{"title":"Go Science Classroom Series School Project \u0026 Demonstration kits","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGo Science Classroom Series\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is the flagship range of educational products from Go Science, specially designed for school projects, STEM learning and classroom demonstrations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDeveloped for students in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGrades 7 to 12\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, the series features curriculum-aligned project and demonstration kits that support practical understanding, science exhibitions, classroom presentations and viva preparation. Each kit helps students explore key scientific concepts through hands-on learning and clear, presentation-ready models\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"fire-alarm-using-flame-sensor-school-project-demonstration-kit","title":"Fire Alarm School Project and Demonstration Kit using Flame Sensor | Go Science Classroom Series","description":"\u003ch1 data-section-id=\"12uziri\" data-start=\"392\" data-end=\"425\" class=\"PDq2pG_selectionAnchorContainer\"\u003eFire Alarm Using Flame Sensor\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003ch2 data-section-id=\"zw0t12\" data-start=\"426\" data-end=\"473\"\u003ePre-Wired School Project \u0026amp; Demonstration Kit\u003c\/h2\u003e\n\u003ch3 data-section-id=\"1fjfnms\" data-start=\"475\" data-end=\"533\"\u003eSee sensing, switching and alert systems come to life.\u003c\/h3\u003e\n\u003cp data-start=\"535\" data-end=\"617\"\u003eTurn an important fire-safety concept into a live, observable learning experience.\u003c\/p\u003e\n\u003cp data-start=\"535\" data-end=\"617\"\u003e\u003ciframe title=\"\" src=\"https:\/\/www.youtube.com\/embed\/0th0AJA7mhI\" height=\"569\" width=\"1012\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp data-start=\"619\" data-end=\"947\"\u003eThe \u003cstrong data-start=\"623\" data-end=\"684\"\u003eGo Science Classroom Series Fire Alarm Using Flame Sensor\u003c\/strong\u003e brings a flame sensor, relay module and audible buzzer together in one complete pre-wired working model. During a supervised demonstration, students can watch the sensor respond to a flame, hear the relay switch and observe the buzzer produce an immediate alert.\u003c\/p\u003e\n\u003cp data-start=\"949\" data-end=\"1016\"\u003eEvery part of the model contributes to a clear functional sequence:\u003c\/p\u003e\n\u003cp data-start=\"1018\" data-end=\"1054\"\u003e\u003cstrong data-start=\"1018\" data-end=\"1054\"\u003eDetect → Signal → Switch → Alert\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1056\" data-end=\"1318\"\u003eThe pre-wired system gives students a dependable working foundation from which they can observe the concept, run controlled tests, repeat the demonstration, record results, explain the role of each component and develop further ideas based on what they discover.\u003c\/p\u003e\n\u003cp data-start=\"1320\" data-end=\"1547\"\u003eDesigned for \u003cstrong data-start=\"1333\" data-end=\"1348\"\u003eGrades 7–12\u003c\/strong\u003e, the model is suitable for school projects, science exhibitions, classroom demonstrations, practical electronics learning and fire-safety concept presentations\u003c\/p\u003e\n\u003ch2 class=\"PDq2pG_selectionAnchorContainer\" data-end=\"1593\" data-start=\"1554\" data-section-id=\"70zlb1\"\u003eA Working Model Made for Exploration\u003cspan class=\"PDq2pG_selectionAnchor\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp data-end=\"1643\" data-start=\"1595\"\u003eLearning begins the moment the model is powered.\u003c\/p\u003e\n\u003cp data-end=\"1836\" data-start=\"1645\"\u003eConnect a fresh 9V battery, follow the demonstration guide and observe how the complete electronic system responds. The model allows students to move naturally through the scientific process:\u003c\/p\u003e\n\u003cp data-end=\"1899\" data-start=\"1838\"\u003e\u003cstrong data-end=\"1899\" data-start=\"1838\"\u003ePredict. Test. Observe. Repeat. Explain. Explore further.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"2096\" data-start=\"1901\"\u003eStudents can investigate how the sensor reacts, identify the sequence of events, compare results under different conditions and connect each physical response to the electronic concept behind it.\u003c\/p\u003e\n\u003cp data-end=\"2146\" data-start=\"2098\"\u003eThe model provides an accessible way to explore:\u003c\/p\u003e\n\u003cul data-end=\"2383\" data-start=\"2148\"\u003e\n\u003cli data-end=\"2163\" data-start=\"2148\" data-section-id=\"1u362m8\"\u003eFlame sensing\u003c\/li\u003e\n\u003cli data-end=\"2184\" data-start=\"2164\" data-section-id=\"tv2rwm\"\u003eInfrared detection\u003c\/li\u003e\n\u003cli data-end=\"2205\" data-start=\"2185\" data-section-id=\"1ev7z6z\"\u003eElectrical signals\u003c\/li\u003e\n\u003cli data-end=\"2229\" data-start=\"2206\" data-section-id=\"1annusl\"\u003eRelay-based switching\u003c\/li\u003e\n\u003cli data-end=\"2254\" data-start=\"2230\" data-section-id=\"kmttuc\"\u003eAudible alert circuits\u003c\/li\u003e\n\u003cli data-end=\"2281\" data-start=\"2255\" data-section-id=\"pa6asc\"\u003eInput and output systems\u003c\/li\u003e\n\u003cli data-end=\"2302\" data-start=\"2282\" data-section-id=\"14788d2\"\u003eAutomatic response\u003c\/li\u003e\n\u003cli data-end=\"2323\" data-start=\"2303\" data-section-id=\"1ozq0zc\"\u003eCircuit protection\u003c\/li\u003e\n\u003cli data-end=\"2357\" data-start=\"2324\" data-section-id=\"1vsbfq1\"\u003eObservation and troubleshooting\u003c\/li\u003e\n\u003cli data-end=\"2383\" data-start=\"2358\" data-section-id=\"r99ipp\"\u003eSensor-based automation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-end=\"11501\" data-start=\"11481\" data-section-id=\"1hjr29d\"\u003eWhat’s in this preassembled Kit?\u003c\/h1\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"An infographic detailing the contents of a Classroom Series by Go Science pre-assembled model kit, showing 10 different components arranged in a grid with icons and labels on a white background.Go Science Classroom Series Fire Alarm Using Flame Sensor School Project \u0026amp; Demonstration Model kit content\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0647\/4442\/3471\/files\/Go_Science_Classroom_Series_Fire_Alarm_Using_Flame_Sensor_School_Project_Demonstration_Model_kit_content_480x480.jpg?v=1784565944\"\u003e\u003c\/div\u003e\n\u003cp\u003eThese form the part of preassembled, pre wired kit.\u003c\/p\u003e\n\u003cul data-end=\"11880\" data-start=\"11503\"\u003e\n\u003cli data-end=\"11524\" data-start=\"11503\" data-section-id=\"1ry9y5j\"\u003eFlame sensor module\u003c\/li\u003e\n\u003cli data-end=\"11542\" data-start=\"11525\" data-section-id=\"1xxec4y\"\u003e5V relay module\u003c\/li\u003e\n\u003cli data-end=\"11561\" data-start=\"11543\" data-section-id=\"1i8s15z\"\u003e5V active buzzer\u003c\/li\u003e\n\u003cli data-end=\"11604\" data-start=\"11562\" data-section-id=\"ruatwo\"\u003eInline reverse-polarity protection diode\u003c\/li\u003e\n\u003cli data-end=\"11639\" data-start=\"11605\" data-section-id=\"1crsto3\"\u003eHouse model with contextual base\u003c\/li\u003e\n\u003cli data-end=\"11672\" data-start=\"11640\" data-section-id=\"st90l0\"\u003eWooden component-support block\u003c\/li\u003e\n\u003cli data-end=\"11707\" data-start=\"11673\" data-section-id=\"zjevfo\"\u003ePre-wired electrical connections\u003c\/li\u003e\n\u003cli data-end=\"11732\" data-start=\"11708\" data-section-id=\"myf71m\"\u003eBattery snap connector\u003c\/li\u003e\n\u003cli data-end=\"11761\" data-start=\"11733\" data-section-id=\"tpibow\"\u003eDigital instruction manual\u003c\/li\u003e\n\u003cli data-end=\"11786\" data-start=\"11762\" data-section-id=\"lq9y63\"\u003eDemonstration guidance\u003c\/li\u003e\n\u003cli data-end=\"11808\" data-start=\"11787\" data-section-id=\"cvpsyn\"\u003eSafety instructions\u003c\/li\u003e\n\u003cli data-end=\"11834\" data-start=\"11809\" data-section-id=\"s1r7wf\"\u003eTroubleshooting support\u003c\/li\u003e\n\u003cli data-end=\"11880\" data-start=\"11835\" data-section-id=\"acpo6r\"\u003eObservation and concept-learning activities\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"11903\" data-start=\"11882\" data-section-id=\"1whrv7q\"\u003ePower Requirement\u003c\/h3\u003e\n\u003cp data-end=\"11939\" data-start=\"11905\"\u003eRequires one fresh \u003cstrong data-end=\"11938\" data-start=\"11924\"\u003e9V battery\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-end=\"11969\" data-start=\"11941\"\u003e\u003cstrong data-end=\"11969\" data-start=\"11941\"\u003eBattery is not included.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3 data-end=\"12003\" data-start=\"11971\" data-section-id=\"mq38qi\"\u003eApproximate Model Dimensions\u003c\/h3\u003e\n\u003cp data-end=\"12029\" data-start=\"12005\"\u003e\u003cstrong data-end=\"12029\" data-start=\"12005\"\u003e16 cm × 11 cm × 6 cm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"12127\" data-start=\"12031\"\u003eThe contents, battery requirement and dimensions are documented in the supplied product manual.\u003c\/p\u003e\n\u003ch1 class=\"PDq2pG_selectionAnchorContainer\" data-end=\"2406\" data-start=\"2390\" data-section-id=\"1hvzd94\"\u003eWhy Pre-Wired?\u003cspan class=\"PDq2pG_selectionAnchor\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003ch2 data-end=\"2450\" data-start=\"2408\" data-section-id=\"12vgu7p\"\u003eBegin with a proven working foundation.\u003c\/h2\u003e\n\u003cp data-end=\"2590\" data-start=\"2452\"\u003eThe complete sensing and alert pathway is arranged in advance so that students can experience the system as one coordinated working model.\u003c\/p\u003e\n\u003cp data-end=\"2673\" data-start=\"2592\"\u003eThis makes it possible to focus directly on the heart of the learning experience:\u003c\/p\u003e\n\u003ch3 data-end=\"2697\" data-start=\"2675\" data-section-id=\"10ed74w\"\u003eObserve the System\u003c\/h3\u003e\n\u003cp data-end=\"2790\" data-start=\"2699\"\u003eWatch the sensor indicator respond, hear the relay activate and listen to the buzzer sound.\u003c\/p\u003e\n\u003ch3 data-end=\"2813\" data-start=\"2792\" data-section-id=\"4kkpv4\"\u003eFollow the Signal\u003c\/h3\u003e\n\u003cp data-end=\"2922\" data-start=\"2815\"\u003eTrace the functional journey from flame detection to electrical signal, relay switching and audible output.\u003c\/p\u003e\n\u003ch3 data-end=\"2937\" data-start=\"2924\" data-section-id=\"1hil7qi\"\u003eRun Tests\u003c\/h3\u003e\n\u003cp data-end=\"3088\" data-start=\"2939\"\u003eRepeat the demonstration under controlled conditions and observe how distance, direction, lighting and sensor positioning may influence the response.\u003c\/p\u003e\n\u003ch3 data-end=\"3109\" data-start=\"3090\" data-section-id=\"1r77zul\"\u003eRecord Findings\u003c\/h3\u003e\n\u003cp data-end=\"3202\" data-start=\"3111\"\u003eCreate an observation table, compare test results and describe the behaviour of the system.\u003c\/p\u003e\n\u003ch3 data-end=\"3227\" data-start=\"3204\" data-section-id=\"8tks60\"\u003eExplain the Concept\u003c\/h3\u003e\n\u003cp data-end=\"3357\" data-start=\"3229\"\u003eUse the visible working sequence to confidently explain the project during a classroom presentation, science exhibition or viva.\u003c\/p\u003e\n\u003ch3 data-end=\"3382\" data-start=\"3359\" data-section-id=\"188z5ac\"\u003eBuild Upon the Idea\u003c\/h3\u003e\n\u003cp data-end=\"3551\" data-start=\"3384\"\u003eUse the working model as a foundation for discussing additional indicators, sensor systems, automation concepts, robotics applications and future electronics projects.\u003c\/p\u003e\n\u003cp data-end=\"3730\" data-start=\"3553\"\u003eThe pre-wired design transforms the model into a \u003cstrong data-end=\"3644\" data-start=\"3602\"\u003eready-to-investigate learning platform\u003c\/strong\u003e—one that can be demonstrated, questioned, tested, understood and explored repeatedly.\u003c\/p\u003e\n\u003chr data-end=\"3735\" data-start=\"3732\"\u003e\n\u003ch1 data-end=\"3772\" data-start=\"3737\" data-section-id=\"19y3zfv\"\u003eWatch the Complete System Respond\u003c\/h1\u003e\n\u003ch2 data-end=\"3786\" data-start=\"3774\" data-section-id=\"10c3ut9\"\u003e1. Detect\u003c\/h2\u003e\n\u003cp data-end=\"3823\" data-start=\"3788\"\u003eThe flame sensor acts as the input.\u003c\/p\u003e\n\u003cp data-end=\"3985\" data-start=\"3825\"\u003eWhen a small flame is introduced within the detection area during an adult-supervised test, the sensor responds to infrared radiation associated with the flame.\u003c\/p\u003e\n\u003ch2 data-end=\"3999\" data-start=\"3987\" data-section-id=\"6psk4n\"\u003e2. Signal\u003c\/h2\u003e\n\u003cp data-end=\"4078\" data-start=\"4001\"\u003eThe sensor converts the detected condition into an electrical trigger signal.\u003c\/p\u003e\n\u003cp data-end=\"4176\" data-start=\"4080\"\u003eThis demonstrates how a sensor communicates information to another part of an electronic system.\u003c\/p\u003e\n\u003ch2 data-end=\"4190\" data-start=\"4178\" data-section-id=\"1ie9o8a\"\u003e3. Switch\u003c\/h2\u003e\n\u003cp data-end=\"4228\" data-start=\"4192\"\u003eThe signal reaches the relay module.\u003c\/p\u003e\n\u003cp data-end=\"4340\" data-start=\"4230\"\u003eThe relay activates with a distinct mechanical click and changes the state of its internal switching contacts.\u003c\/p\u003e\n\u003ch2 data-end=\"4353\" data-start=\"4342\" data-section-id=\"14e66fl\"\u003e4. Alert\u003c\/h2\u003e\n\u003cp data-end=\"4394\" data-start=\"4355\"\u003eThe relay completes the buzzer circuit.\u003c\/p\u003e\n\u003cp data-end=\"4486\" data-start=\"4396\"\u003eThe active buzzer produces a clear audible warning, representing the output of the system.\u003c\/p\u003e\n\u003ch2 data-end=\"4499\" data-start=\"4488\" data-section-id=\"pmuv3f\"\u003e5. Reset\u003c\/h2\u003e\n\u003cp data-end=\"4584\" data-start=\"4501\"\u003eWhen the flame is extinguished and removed, the sensor returns to its normal state.\u003c\/p\u003e\n\u003cp data-end=\"4640\" data-start=\"4586\"\u003eThe relay releases and the buzzer stops automatically.\u003c\/p\u003e\n\u003cp data-end=\"4782\" data-start=\"4642\"\u003eThis complete response helps students understand how several electronic components work together to sense a condition and produce an action.\u003c\/p\u003e\n\u003ch1 data-end=\"4820\" data-start=\"4789\" data-section-id=\"jzi4u9\"\u003eExplore the Role of the Relay\u003c\/h1\u003e\n\u003ch2 data-end=\"4861\" data-start=\"4822\" data-section-id=\"1dnwe7k\"\u003eHear electrical switching in action.\u003c\/h2\u003e\n\u003cp data-end=\"4951\" data-start=\"4863\"\u003eThe relay introduces an important control stage between the flame sensor and the buzzer.\u003c\/p\u003e\n\u003cp data-end=\"5086\" data-start=\"4953\"\u003eRather than treating the project as a single response, students can observe it as a connected system with separate functional stages:\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\" data-end=\"5554\" data-start=\"5088\"\u003e\n\u003cthead data-end=\"5124\" data-start=\"5088\"\u003e\n\u003ctr data-end=\"5124\" data-start=\"5088\"\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"5096\" data-start=\"5088\"\u003eStage\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"5108\" data-start=\"5096\"\u003eComponent\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"md\" data-end=\"5124\" data-start=\"5108\"\u003eWhat It Does\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-end=\"5554\" data-start=\"5139\"\u003e\n\u003ctr data-end=\"5206\" data-start=\"5139\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"5151\" data-start=\"5139\"\u003e\u003cstrong data-end=\"5150\" data-start=\"5141\"\u003eInput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"5166\" data-start=\"5151\"\u003eFlame sensor\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"5206\" data-start=\"5166\"\u003eResponds to radiation from the flame\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"5276\" data-start=\"5207\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"5220\" data-start=\"5207\"\u003e\u003cstrong data-end=\"5219\" data-start=\"5209\"\u003eSignal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"5236\" data-start=\"5220\"\u003eSensor output\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"5276\" data-start=\"5236\"\u003eSends the detected condition forward\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"5349\" data-start=\"5277\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"5293\" data-start=\"5277\"\u003e\u003cstrong data-end=\"5292\" data-start=\"5279\"\u003eSwitching\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"5308\" data-start=\"5293\"\u003eRelay module\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"5349\" data-start=\"5308\"\u003eOpens or completes the output circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"5409\" data-start=\"5350\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"5363\" data-start=\"5350\"\u003e\u003cstrong data-end=\"5362\" data-start=\"5352\"\u003eOutput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"5379\" data-start=\"5363\"\u003eActive buzzer\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"5409\" data-start=\"5379\"\u003eProduces the audible alert\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"5494\" data-start=\"5410\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"5427\" data-start=\"5410\"\u003e\u003cstrong data-end=\"5426\" data-start=\"5412\"\u003eProtection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"5442\" data-start=\"5427\"\u003eInline diode\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"5494\" data-start=\"5442\"\u003eHelps guard the circuit against reverse polarity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"5554\" data-start=\"5495\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"5507\" data-start=\"5495\"\u003e\u003cstrong data-end=\"5506\" data-start=\"5497\"\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"5520\" data-start=\"5507\"\u003e9V battery\u003c\/td\u003e\n\u003ctd data-end=\"5554\" data-start=\"5520\" data-col-size=\"md\"\u003ePowers the demonstration model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-end=\"5670\" data-start=\"5556\"\u003eThe relay’s indicator and mechanical clicking action give students a physical sign that switching has taken place.\u003c\/p\u003e\n\u003cp data-end=\"5693\" data-start=\"5672\"\u003eStudents can explore:\u003c\/p\u003e\n\u003cul data-end=\"6052\" data-start=\"5695\"\u003e\n\u003cli data-end=\"5739\" data-start=\"5695\" data-section-id=\"1bxhd4f\"\u003eHow an electrical signal activates a relay\u003c\/li\u003e\n\u003cli data-end=\"5780\" data-start=\"5740\" data-section-id=\"18pttue\"\u003eHow an electromagnetic switch operates\u003c\/li\u003e\n\u003cli data-end=\"5809\" data-start=\"5781\" data-section-id=\"nynzz\"\u003eThe role of the relay coil\u003c\/li\u003e\n\u003cli data-end=\"5863\" data-start=\"5810\" data-section-id=\"cp2umr\"\u003eCommon, Normally Open and Normally Closed terminals\u003c\/li\u003e\n\u003cli data-end=\"5910\" data-start=\"5864\" data-section-id=\"1pholhd\"\u003eHow a Normally Open circuit becomes complete\u003c\/li\u003e\n\u003cli data-end=\"5957\" data-start=\"5911\" data-section-id=\"almwke\"\u003eThe difference between sensing and switching\u003c\/li\u003e\n\u003cli data-end=\"6001\" data-start=\"5958\" data-section-id=\"yg6nd7\"\u003eHow one circuit stage can control another\u003c\/li\u003e\n\u003cli data-end=\"6052\" data-start=\"6002\" data-section-id=\"1o6mjr3\"\u003eHow automatic systems respond to changing inputs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-end=\"6105\" data-start=\"6059\" data-section-id=\"hui467\"\u003eA Real-World Context Students Can Understand\u003c\/h1\u003e\n\u003ch2 data-end=\"6162\" data-start=\"6107\" data-section-id=\"1hkudai\"\u003eFrom individual components to one meaningful system.\u003c\/h2\u003e\n\u003cp data-end=\"6305\" data-start=\"6164\"\u003eThe model places the electronics within a house-based fire-warning scenario, giving every component a clear purpose within the demonstration.\u003c\/p\u003e\n\u003cul data-end=\"6630\" data-start=\"6307\"\u003e\n\u003cli data-end=\"6355\" data-start=\"6307\" data-section-id=\"fu4ze8\"\u003eThe \u003cstrong data-end=\"6322\" data-start=\"6313\"\u003ehouse\u003c\/strong\u003e creates the application context.\u003c\/li\u003e\n\u003cli data-end=\"6410\" data-start=\"6356\" data-section-id=\"17mivyv\"\u003eThe \u003cstrong data-end=\"6378\" data-start=\"6362\"\u003eflame sensor\u003c\/strong\u003e represents the detection stage.\u003c\/li\u003e\n\u003cli data-end=\"6468\" data-start=\"6411\" data-section-id=\"16i2iv5\"\u003eThe \u003cstrong data-end=\"6426\" data-start=\"6417\"\u003erelay\u003c\/strong\u003e represents the automatic switching stage.\u003c\/li\u003e\n\u003cli data-end=\"6516\" data-start=\"6469\" data-section-id=\"zfph3w\"\u003eThe \u003cstrong data-end=\"6485\" data-start=\"6475\"\u003ebuzzer\u003c\/strong\u003e represents the warning output.\u003c\/li\u003e\n\u003cli data-end=\"6561\" data-start=\"6517\" data-section-id=\"1h9hehi\"\u003eThe \u003cstrong data-end=\"6534\" data-start=\"6523\"\u003ebattery\u003c\/strong\u003e supplies electrical power.\u003c\/li\u003e\n\u003cli data-end=\"6630\" data-start=\"6562\" data-section-id=\"d7mqay\"\u003eThe \u003cstrong data-end=\"6588\" data-start=\"6568\"\u003eprotection diode\u003c\/strong\u003e introduces the concept of circuit safety.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"6753\" data-start=\"6632\"\u003eThis contextual arrangement makes it easier for students to connect electronic functions with a recognisable application.\u003c\/p\u003e\n\u003cp data-end=\"6818\" data-start=\"6755\"\u003eThey can explain not only the name of each component, but also:\u003c\/p\u003e\n\u003cul data-end=\"6973\" data-start=\"6820\"\u003e\n\u003cli data-end=\"6839\" data-start=\"6820\" data-section-id=\"lc0tb6\"\u003eWhy it is present\u003c\/li\u003e\n\u003cli data-end=\"6870\" data-start=\"6840\" data-section-id=\"28tgwb\"\u003eWhat information it receives\u003c\/li\u003e\n\u003cli data-end=\"6896\" data-start=\"6871\" data-section-id=\"48jtur\"\u003eWhat action it performs\u003c\/li\u003e\n\u003cli data-end=\"6935\" data-start=\"6897\" data-section-id=\"1digr98\"\u003eHow it interacts with the next stage\u003c\/li\u003e\n\u003cli data-end=\"6973\" data-start=\"6936\" data-section-id=\"1gvknrx\"\u003eHow all the stages operate together\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-end=\"7006\" data-start=\"6980\" data-section-id=\"z0ux1z\"\u003eTest. Observe. Discover.\u003c\/h1\u003e\n\u003cp data-end=\"7065\" data-start=\"7008\"\u003eThe model can support multiple supervised investigations.\u003c\/p\u003e\n\u003ch2 data-end=\"7089\" data-start=\"7067\" data-section-id=\"101n6ta\"\u003eFlame-Distance Test\u003c\/h2\u003e\n\u003cp data-end=\"7165\" data-start=\"7091\"\u003ePresent the flame at different safe distances within the instructed range.\u003c\/p\u003e\n\u003cp data-end=\"7239\" data-start=\"7167\"\u003eObserve whether the sensor responds consistently and record the results.\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\" data-end=\"7424\" data-start=\"7241\"\u003e\n\u003cthead data-end=\"7313\" data-start=\"7241\"\u003e\n\u003ctr data-end=\"7313\" data-start=\"7241\"\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"7248\" data-start=\"7241\"\u003eTest\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"7259\" data-start=\"7248\"\u003eDistance\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"7277\" data-start=\"7259\"\u003eSensor Response\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"7295\" data-start=\"7277\"\u003eRelay Activated\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"7313\" data-start=\"7295\"\u003eBuzzer Sounded\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-end=\"7424\" data-start=\"7337\"\u003e\n\u003ctr data-end=\"7358\" data-start=\"7337\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7341\" data-start=\"7337\"\u003e1\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7348\" data-start=\"7341\"\u003e5 cm\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7351\" data-start=\"7348\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7354\" data-start=\"7351\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7358\" data-start=\"7354\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"7380\" data-start=\"7359\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7363\" data-start=\"7359\"\u003e2\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7370\" data-start=\"7363\"\u003e6 cm\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7373\" data-start=\"7370\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7376\" data-start=\"7373\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7380\" data-start=\"7376\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"7402\" data-start=\"7381\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7385\" data-start=\"7381\"\u003e3\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7392\" data-start=\"7385\"\u003e7 cm\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7395\" data-start=\"7392\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7398\" data-start=\"7395\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7402\" data-start=\"7398\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"7424\" data-start=\"7403\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7407\" data-start=\"7403\"\u003e4\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7414\" data-start=\"7407\"\u003e8 cm\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7417\" data-start=\"7414\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7420\" data-start=\"7417\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"7424\" data-start=\"7420\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 data-end=\"7449\" data-start=\"7426\" data-section-id=\"1wkx9cg\"\u003eDetection-Angle Test\u003c\/h2\u003e\n\u003cp data-end=\"7540\" data-start=\"7451\"\u003eKeep the distance similar while changing the direction from which the flame is presented.\u003c\/p\u003e\n\u003cp data-end=\"7595\" data-start=\"7542\"\u003eObserve how sensor alignment influences the response.\u003c\/p\u003e\n\u003ch2 data-end=\"7622\" data-start=\"7597\" data-section-id=\"ksbw02\"\u003eResponse-Sequence Test\u003c\/h2\u003e\n\u003cp data-end=\"7657\" data-start=\"7624\"\u003eFollow the exact order of events:\u003c\/p\u003e\n\u003col data-end=\"7875\" data-start=\"7659\"\u003e\n\u003cli data-end=\"7702\" data-start=\"7659\" data-section-id=\"1xgud19\"\u003eFlame enters the sensor’s viewing area\u003c\/li\u003e\n\u003cli data-end=\"7733\" data-start=\"7703\" data-section-id=\"5fbz58\"\u003eSensor indicator responds\u003c\/li\u003e\n\u003cli data-end=\"7775\" data-start=\"7734\" data-section-id=\"zkosyn\"\u003eElectrical trigger reaches the relay\u003c\/li\u003e\n\u003cli data-end=\"7796\" data-start=\"7776\" data-section-id=\"qmt7xy\"\u003eRelay activates\u003c\/li\u003e\n\u003cli data-end=\"7815\" data-start=\"7797\" data-section-id=\"1425p4e\"\u003eBuzzer sounds\u003c\/li\u003e\n\u003cli data-end=\"7837\" data-start=\"7816\" data-section-id=\"1jgmlnq\"\u003eFlame is removed\u003c\/li\u003e\n\u003cli data-end=\"7857\" data-start=\"7838\" data-section-id=\"gii91h\"\u003eRelay releases\u003c\/li\u003e\n\u003cli data-end=\"7875\" data-start=\"7858\" data-section-id=\"dmztnc\"\u003eBuzzer stops\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 data-end=\"7898\" data-start=\"7877\" data-section-id=\"1sczom\"\u003eRepeatability Test\u003c\/h2\u003e\n\u003cp data-end=\"7950\" data-start=\"7900\"\u003eRepeat the demonstration under similar conditions.\u003c\/p\u003e\n\u003cp data-end=\"8023\" data-start=\"7952\"\u003eCompare whether the system produces the same sequence during each test.\u003c\/p\u003e\n\u003ch2 data-end=\"8053\" data-start=\"8025\" data-section-id=\"xpsgjw\"\u003eAmbient-Light Observation\u003c\/h2\u003e\n\u003cp data-end=\"8116\" data-start=\"8055\"\u003eObserve the model under different indoor lighting conditions.\u003c\/p\u003e\n\u003cp data-end=\"8219\" data-start=\"8118\"\u003eDiscuss why an optical sensor may respond differently depending on the surrounding light environment.\u003c\/p\u003e\n\u003ch2 data-end=\"8247\" data-start=\"8221\" data-section-id=\"etvoll\"\u003eSensitivity Exploration\u003c\/h2\u003e\n\u003cp data-end=\"8364\" data-start=\"8249\"\u003eUnder teacher guidance, observe how the sensor’s onboard sensitivity adjustment influences its detection behaviour.\u003c\/p\u003e\n\u003cp data-end=\"8419\" data-start=\"8366\"\u003eAdjustments should be small, controlled and recorded.\u003c\/p\u003e\n\u003ch1 data-end=\"8452\" data-start=\"8426\" data-section-id=\"grc2aq\"\u003eLearn Through Every Test\u003c\/h1\u003e\n\u003cp data-end=\"8515\" data-start=\"8454\"\u003eEach demonstration can develop more than technical knowledge.\u003c\/p\u003e\n\u003cp data-end=\"8535\" data-start=\"8517\"\u003eStudents practise:\u003c\/p\u003e\n\u003ch3 data-end=\"8552\" data-start=\"8537\" data-section-id=\"u5c77o\"\u003eObservation\u003c\/h3\u003e\n\u003cp data-end=\"8631\" data-start=\"8554\"\u003eNoticing indicators, sounds, switching behaviour and changes in system state.\u003c\/p\u003e\n\u003ch3 data-end=\"8647\" data-start=\"8633\" data-section-id=\"13gk4ur\"\u003ePrediction\u003c\/h3\u003e\n\u003cp data-end=\"8717\" data-start=\"8649\"\u003eThinking about how the model may respond before carrying out a test.\u003c\/p\u003e\n\u003ch3 data-end=\"8736\" data-start=\"8719\" data-section-id=\"9q41t2\"\u003eInvestigation\u003c\/h3\u003e\n\u003cp data-end=\"8808\" data-start=\"8738\"\u003eChanging one test condition while keeping other conditions controlled.\u003c\/p\u003e\n\u003ch3 data-end=\"8823\" data-start=\"8810\" data-section-id=\"11ix9fv\"\u003eRecording\u003c\/h3\u003e\n\u003cp data-end=\"8883\" data-start=\"8825\"\u003eDocumenting distances, conditions, responses and outcomes.\u003c\/p\u003e\n\u003ch3 data-end=\"8899\" data-start=\"8885\" data-section-id=\"1htc6jj\"\u003eComparison\u003c\/h3\u003e\n\u003cp data-end=\"8952\" data-start=\"8901\"\u003eLooking for differences and patterns between tests.\u003c\/p\u003e\n\u003ch3 data-end=\"8967\" data-start=\"8954\" data-section-id=\"1qizxky\"\u003eReasoning\u003c\/h3\u003e\n\u003cp data-end=\"9024\" data-start=\"8969\"\u003eExplaining why a particular response may have occurred.\u003c\/p\u003e\n\u003ch3 data-end=\"9045\" data-start=\"9026\" data-section-id=\"1l0k266\"\u003eTroubleshooting\u003c\/h3\u003e\n\u003cp data-end=\"9169\" data-start=\"9047\"\u003eChecking the battery, sensor direction, surrounding light, flame distance and visible connections when the result changes.\u003c\/p\u003e\n\u003ch3 data-end=\"9188\" data-start=\"9171\" data-section-id=\"8qstqe\"\u003eCommunication\u003c\/h3\u003e\n\u003cp data-end=\"9278\" data-start=\"9190\"\u003ePresenting the complete concept clearly to teachers, classmates and exhibition visitors.\u003c\/p\u003e\n\u003ch3 data-end=\"9293\" data-start=\"9280\" data-section-id=\"an1rjz\"\u003eExtension\u003c\/h3\u003e\n\u003cp data-end=\"9371\" data-start=\"9295\"\u003eUsing the original model to develop new questions and further project ideas.\u003c\/p\u003e\n\u003ch1 data-end=\"9407\" data-start=\"9378\" data-section-id=\"1x4ls0c\"\u003eReverse-Polarity Protection\u003c\/h1\u003e\n\u003ch2 data-end=\"9456\" data-start=\"9409\" data-section-id=\"155rxbv\"\u003eExplore how a diode helps protect a circuit.\u003c\/h2\u003e\n\u003cp data-end=\"9542\" data-start=\"9458\"\u003eThe model includes an inline protection diode within its pre-wired power connection.\u003c\/p\u003e\n\u003cp data-end=\"9734\" data-start=\"9544\"\u003eA diode allows electrical current to flow primarily in one direction. In this model, it helps block reverse current if the battery connector is accidentally attached with incorrect polarity.\u003c\/p\u003e\n\u003cp data-end=\"9764\" data-start=\"9736\"\u003eThis introduces students to:\u003c\/p\u003e\n\u003cul data-end=\"9988\" data-start=\"9766\"\u003e\n\u003cli data-end=\"9798\" data-start=\"9766\" data-section-id=\"1cb3pnz\"\u003ePositive and negative polarity\u003c\/li\u003e\n\u003cli data-end=\"9826\" data-start=\"9799\" data-section-id=\"11opif3\"\u003eDirection of current flow\u003c\/li\u003e\n\u003cli data-end=\"9850\" data-start=\"9827\" data-section-id=\"19kr6iw\"\u003eBasic diode behaviour\u003c\/li\u003e\n\u003cli data-end=\"9880\" data-start=\"9851\" data-section-id=\"1oumn2a\"\u003eReverse-polarity protection\u003c\/li\u003e\n\u003cli data-end=\"9933\" data-start=\"9881\" data-section-id=\"1fnvl5l\"\u003eThe importance of protecting electronic components\u003c\/li\u003e\n\u003cli data-end=\"9988\" data-start=\"9934\" data-section-id=\"jrp5r5\"\u003eHow protection features are integrated into circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"10156\" data-start=\"9990\"\u003eThe protection diode is an additional safeguard. The battery should always be attached carefully and in the correct orientation.\u003c\/p\u003e\n\u003ch1 data-end=\"10185\" data-start=\"10163\" data-section-id=\"1hhrn0b\"\u003eExplore Key Concepts\u003c\/h1\u003e\n\u003cp data-end=\"10247\" data-start=\"10187\"\u003eThe model supports learning across several connected topics:\u003c\/p\u003e\n\u003ch3 data-end=\"10267\" data-start=\"10249\" data-section-id=\"yeuig4\"\u003eSensor Science\u003c\/h3\u003e\n\u003cul data-end=\"10377\" data-start=\"10269\"\u003e\n\u003cli data-end=\"10284\" data-start=\"10269\" data-section-id=\"1u362m8\"\u003eFlame sensing\u003c\/li\u003e\n\u003cli data-end=\"10305\" data-start=\"10285\" data-section-id=\"o3f5qi\"\u003eInfrared radiation\u003c\/li\u003e\n\u003cli data-end=\"10325\" data-start=\"10306\" data-section-id=\"1q7mhsb\"\u003eOptical detection\u003c\/li\u003e\n\u003cli data-end=\"10356\" data-start=\"10326\" data-section-id=\"sae08e\"\u003eDetection distance and angle\u003c\/li\u003e\n\u003cli data-end=\"10377\" data-start=\"10357\" data-section-id=\"1inbocz\"\u003eSensor sensitivity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"10402\" data-start=\"10379\" data-section-id=\"ttzhd4\"\u003eElectrical Circuits\u003c\/h3\u003e\n\u003cul data-end=\"10515\" data-start=\"10404\"\u003e\n\u003cli data-end=\"10418\" data-start=\"10404\" data-section-id=\"y1gkec\"\u003ePower supply\u003c\/li\u003e\n\u003cli data-end=\"10447\" data-start=\"10419\" data-section-id=\"195x17i\"\u003eComplete and open circuits\u003c\/li\u003e\n\u003cli data-end=\"10466\" data-start=\"10448\" data-section-id=\"dgk7tc\"\u003eCurrent pathways\u003c\/li\u003e\n\u003cli data-end=\"10493\" data-start=\"10467\" data-section-id=\"1drqp0h\"\u003eInput and output devices\u003c\/li\u003e\n\u003cli data-end=\"10515\" data-start=\"10494\" data-section-id=\"39uggy\"\u003eElectrical polarity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"10542\" data-start=\"10517\" data-section-id=\"ziwh08\"\u003eSwitching and Control\u003c\/h3\u003e\n\u003cul data-end=\"10661\" data-start=\"10544\"\u003e\n\u003cli data-end=\"10562\" data-start=\"10544\" data-section-id=\"1bqq2nz\"\u003eRelay activation\u003c\/li\u003e\n\u003cli data-end=\"10590\" data-start=\"10563\" data-section-id=\"oqlsiq\"\u003eElectromagnetic switching\u003c\/li\u003e\n\u003cli data-end=\"10615\" data-start=\"10591\" data-section-id=\"1loylah\"\u003eNormally Open contacts\u003c\/li\u003e\n\u003cli data-end=\"10643\" data-start=\"10616\" data-section-id=\"rul43h\"\u003eSignal-controlled outputs\u003c\/li\u003e\n\u003cli data-end=\"10661\" data-start=\"10644\" data-section-id=\"1u2wq00\"\u003eAutomatic reset\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"10690\" data-start=\"10663\" data-section-id=\"p18gl1\"\u003ePractical Investigation\u003c\/h3\u003e\n\u003cul data-end=\"10796\" data-start=\"10692\"\u003e\n\u003cli data-end=\"10712\" data-start=\"10692\" data-section-id=\"lvdpv8\"\u003eControlled testing\u003c\/li\u003e\n\u003cli data-end=\"10728\" data-start=\"10713\" data-section-id=\"1at15ml\"\u003eRepeatability\u003c\/li\u003e\n\u003cli data-end=\"10749\" data-start=\"10729\" data-section-id=\"emq8pz\"\u003eObservation tables\u003c\/li\u003e\n\u003cli data-end=\"10778\" data-start=\"10750\" data-section-id=\"sggcpd\"\u003eCause-and-effect reasoning\u003c\/li\u003e\n\u003cli data-end=\"10796\" data-start=\"10779\" data-section-id=\"z1z1u8\"\u003eTroubleshooting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"10818\" data-start=\"10798\" data-section-id=\"196f7pc\"\u003eSystems Thinking\u003c\/h3\u003e\n\u003cul data-end=\"10879\" data-start=\"10820\"\u003e\n\u003cli data-end=\"10827\" data-start=\"10820\" data-section-id=\"16tcxy6\"\u003eInput\u003c\/li\u003e\n\u003cli data-end=\"10836\" data-start=\"10828\" data-section-id=\"644nau\"\u003eSignal\u003c\/li\u003e\n\u003cli data-end=\"10846\" data-start=\"10837\" data-section-id=\"60q8hb\"\u003eControl\u003c\/li\u003e\n\u003cli data-end=\"10855\" data-start=\"10847\" data-section-id=\"1sl0047\"\u003eOutput\u003c\/li\u003e\n\u003cli data-end=\"10868\" data-start=\"10856\" data-section-id=\"iy0c17\"\u003eProtection\u003c\/li\u003e\n\u003cli data-end=\"10879\" data-start=\"10869\" data-section-id=\"g8pbqj\"\u003eResponse\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-end=\"10921\" data-start=\"10886\" data-section-id=\"1hdonrc\"\u003eBuilt for Confident Demonstration\u003c\/h1\u003e\n\u003cp data-end=\"10998\" data-start=\"10923\"\u003eThe model’s visual layout and clear response sequence make it suitable for:\u003c\/p\u003e\n\u003cul data-end=\"11370\" data-start=\"11000\"\u003e\n\u003cli data-end=\"11025\" data-start=\"11000\" data-section-id=\"cas5ce\"\u003eSchool science projects\u003c\/li\u003e\n\u003cli data-end=\"11047\" data-start=\"11026\" data-section-id=\"kiq2zo\"\u003eScience exhibitions\u003c\/li\u003e\n\u003cli data-end=\"11074\" data-start=\"11048\" data-section-id=\"1e0u4lr\"\u003eClassroom demonstrations\u003c\/li\u003e\n\u003cli data-end=\"11101\" data-start=\"11075\" data-section-id=\"uye3vc\"\u003eSTEM learning activities\u003c\/li\u003e\n\u003cli data-end=\"11132\" data-start=\"11102\" data-section-id=\"98xdlg\"\u003eElectronics concept sessions\u003c\/li\u003e\n\u003cli data-end=\"11162\" data-start=\"11133\" data-section-id=\"a6beu\"\u003eFlame-sensor demonstrations\u003c\/li\u003e\n\u003cli data-end=\"11195\" data-start=\"11163\" data-section-id=\"gkjo0y\"\u003eRelay-switching demonstrations\u003c\/li\u003e\n\u003cli data-end=\"11233\" data-start=\"11196\" data-section-id=\"1reeqb3\"\u003eFire-safety awareness presentations\u003c\/li\u003e\n\u003cli data-end=\"11262\" data-start=\"11234\" data-section-id=\"kers16\"\u003eProject report preparation\u003c\/li\u003e\n\u003cli data-end=\"11293\" data-start=\"11263\" data-section-id=\"197c059\"\u003eObservation-based activities\u003c\/li\u003e\n\u003cli data-end=\"11316\" data-start=\"11294\" data-section-id=\"1hyftfx\"\u003ePractical assessment\u003c\/li\u003e\n\u003cli data-end=\"11337\" data-start=\"11317\" data-section-id=\"5srcjh\"\u003eOral presentations\u003c\/li\u003e\n\u003cli data-end=\"11356\" data-start=\"11338\" data-section-id=\"15rfreh\"\u003eViva preparation\u003c\/li\u003e\n\u003cli data-end=\"11370\" data-start=\"11357\" data-section-id=\"11hgo15\"\u003eGrades 7–12\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"11474\" data-start=\"11372\"\u003eStudents can demonstrate the system and explain the complete concept using the model in front of them.\u003c\/p\u003e\n\u003ch1 data-end=\"12161\" data-start=\"12134\" data-section-id=\"kts086\"\u003eBuild Upon the Foundation\u003c\/h1\u003e\n\u003cp data-end=\"12269\" data-start=\"12163\"\u003eOnce students understand the original sensing and alert sequence, the model can inspire further questions:\u003c\/p\u003e\n\u003cul data-end=\"12719\" data-start=\"12271\"\u003e\n\u003cli data-end=\"12307\" data-start=\"12271\" data-section-id=\"1kypqxh\"\u003eCould a visual indicator be added?\u003c\/li\u003e\n\u003cli data-end=\"12357\" data-start=\"12308\" data-section-id=\"1qbkb9a\"\u003eCould the system activate more than one output?\u003c\/li\u003e\n\u003cli data-end=\"12400\" data-start=\"12358\" data-section-id=\"gzpp5f\"\u003eCould another type of sensor be studied?\u003c\/li\u003e\n\u003cli data-end=\"12431\" data-start=\"12401\" data-section-id=\"p3a34a\"\u003eCould the response be timed?\u003c\/li\u003e\n\u003cli data-end=\"12474\" data-start=\"12432\" data-section-id=\"1namlk\"\u003eCould an event be displayed or recorded?\u003c\/li\u003e\n\u003cli data-end=\"12524\" data-start=\"12475\" data-section-id=\"kukiyl\"\u003eCould the concept connect to a microcontroller?\u003c\/li\u003e\n\u003cli data-end=\"12575\" data-start=\"12525\" data-section-id=\"1vr2g09\"\u003eCould the sensor input guide a robotic response?\u003c\/li\u003e\n\u003cli data-end=\"12615\" data-start=\"12576\" data-section-id=\"1ar1qm8\"\u003eCould multiple sensors work together?\u003c\/li\u003e\n\u003cli data-end=\"12667\" data-start=\"12616\" data-section-id=\"c3kfn8\"\u003eHow would smoke, heat and flame detection differ?\u003c\/li\u003e\n\u003cli data-end=\"12719\" data-start=\"12668\" data-section-id=\"c2cyyf\"\u003eHow could a larger contextual model be developed?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"12846\" data-start=\"12721\"\u003eThese questions encourage students to move from observing an existing system to imagining how future systems may be designed.\u003c\/p\u003e\n\u003cp data-end=\"12945\" data-start=\"12848\"\u003eAdditional functions would require suitable components, technical knowledge and teacher guidance.\u003c\/p\u003e\n\u003ch1 data-end=\"12994\" data-start=\"12952\" data-section-id=\"1sdrx7j\"\u003eThis Concept Can Also Be Used to Explore\u003c\/h1\u003e\n\u003cp data-end=\"13096\" data-start=\"12996\"\u003eThe sensing, switching and alert sequence demonstrated by this model can support discussions around:\u003c\/p\u003e\n\u003cul data-end=\"13606\" data-start=\"13098\"\u003e\n\u003cli data-end=\"13133\" data-start=\"13098\" data-section-id=\"jjcsw5\"\u003eSensor-controlled warning systems\u003c\/li\u003e\n\u003cli data-end=\"13166\" data-start=\"13134\" data-section-id=\"1412uee\"\u003eAutomatic flame-alert concepts\u003c\/li\u003e\n\u003cli data-end=\"13199\" data-start=\"13167\" data-section-id=\"6rgrru\"\u003eRelay-operated buzzer circuits\u003c\/li\u003e\n\u003cli data-end=\"13236\" data-start=\"13200\" data-section-id=\"19v1q39\"\u003eSmart-building monitoring concepts\u003c\/li\u003e\n\u003cli data-end=\"13274\" data-start=\"13237\" data-section-id=\"9m2oi4\"\u003eHome fire-safety awareness displays\u003c\/li\u003e\n\u003cli data-end=\"13307\" data-start=\"13275\" data-section-id=\"l1zfg4\"\u003eLaboratory monitoring concepts\u003c\/li\u003e\n\u003cli data-end=\"13345\" data-start=\"13308\" data-section-id=\"nbed3y\"\u003eIndustrial furnace warning concepts\u003c\/li\u003e\n\u003cli data-end=\"13374\" data-start=\"13346\" data-section-id=\"yqvz8i\"\u003eServer-room alert concepts\u003c\/li\u003e\n\u003cli data-end=\"13411\" data-start=\"13375\" data-section-id=\"1lmzunn\"\u003eForest-fire early-warning concepts\u003c\/li\u003e\n\u003cli data-end=\"13447\" data-start=\"13412\" data-section-id=\"15ekilh\"\u003eFirefighting robot input concepts\u003c\/li\u003e\n\u003cli data-end=\"13488\" data-start=\"13448\" data-section-id=\"138aw9u\"\u003eAutomatic hazard-notification concepts\u003c\/li\u003e\n\u003cli data-end=\"13520\" data-start=\"13489\" data-section-id=\"1qfcw97\"\u003eInfrared sensing applications\u003c\/li\u003e\n\u003cli data-end=\"13550\" data-start=\"13521\" data-section-id=\"1i1fml5\"\u003eMulti-stage control systems\u003c\/li\u003e\n\u003cli data-end=\"13576\" data-start=\"13551\" data-section-id=\"r99ipp\"\u003eSensor-based automation\u003c\/li\u003e\n\u003cli data-end=\"13606\" data-start=\"13577\" data-section-id=\"1gospzq\"\u003eInput-process-output models\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"13763\" data-start=\"13608\"\u003eThese are \u003cstrong data-end=\"13652\" data-start=\"13618\"\u003eeducational concept extensions\u003c\/strong\u003e based on the model’s working principle. They are not built-in real-world applications of the supplied product.\u003c\/p\u003e\n\u003ch1 data-end=\"13799\" data-start=\"13770\" data-section-id=\"158v5je\"\u003eA Complete Learning Journey\u003c\/h1\u003e\n\u003ch2 data-end=\"13822\" data-start=\"13801\" data-section-id=\"da482p\"\u003eSee the concept.\u003c\/h2\u003e\n\u003ch2 data-end=\"13846\" data-start=\"13823\" data-section-id=\"peke1p\"\u003eFollow the signal.\u003c\/h2\u003e\n\u003ch2 data-end=\"13868\" data-start=\"13847\" data-section-id=\"1ewj59a\"\u003eHear the switch.\u003c\/h2\u003e\n\u003ch2 data-end=\"13892\" data-start=\"13869\" data-section-id=\"184o9lz\"\u003eTest the response.\u003c\/h2\u003e\n\u003ch2 data-end=\"13917\" data-start=\"13893\" data-section-id=\"1ixk6pc\"\u003eExplain the system.\u003c\/h2\u003e\n\u003ch2 data-end=\"13941\" data-start=\"13918\" data-section-id=\"1e6rqbt\"\u003eBuild upon the idea.\u003c\/h2\u003e\n\u003cp data-end=\"14197\" data-start=\"13943\"\u003eThe Go Science Fire Alarm Using Flame Sensor gives students a working foundation for exploring how electronic systems detect, decide and respond—turning an abstract circuit concept into something they can observe, investigate and confidently demonstrate.\u003c\/p\u003e\n\u003ch2 data-end=\"14251\" data-start=\"14204\" data-section-id=\"8xdtun\"\u003eImportant Educational and Safety Information\u003c\/h2\u003e\n\u003cp data-end=\"14329\" data-start=\"14253\"\u003eThis product is an educational demonstration model and science teaching aid.\u003c\/p\u003e\n\u003cul data-end=\"14850\" data-start=\"14331\"\u003e\n\u003cli data-end=\"14374\" data-start=\"14331\" data-section-id=\"1pppkqx\"\u003eAdult or teacher supervision is required.\u003c\/li\u003e\n\u003cli data-end=\"14433\" data-start=\"14375\" data-section-id=\"rjk80\"\u003eOnly an adult or teacher should handle the flame source.\u003c\/li\u003e\n\u003cli data-end=\"14492\" data-start=\"14434\" data-section-id=\"u39eqd\"\u003eUse the model on a flat, dry and heat-resistant surface.\u003c\/li\u003e\n\u003cli data-end=\"14541\" data-start=\"14493\" data-section-id=\"5ehael\"\u003eKeep loose paper and flammable materials away.\u003c\/li\u003e\n\u003cli data-end=\"14602\" data-start=\"14542\" data-section-id=\"1ppntn0\"\u003eMaintain the recommended distance of approximately 5–8 cm.\u003c\/li\u003e\n\u003cli data-end=\"14656\" data-start=\"14603\" data-section-id=\"53eb70\"\u003eNever allow the flame to touch the sensor or model.\u003c\/li\u003e\n\u003cli data-end=\"14721\" data-start=\"14657\" data-section-id=\"5zqt2v\"\u003eExtinguish the flame immediately after observing the response.\u003c\/li\u003e\n\u003cli data-end=\"14754\" data-start=\"14722\" data-section-id=\"4azv71\"\u003eKeep each demonstration brief.\u003c\/li\u003e\n\u003cli data-end=\"14806\" data-start=\"14755\" data-section-id=\"1jpxvo\"\u003eDisconnect the battery immediately after testing.\u003c\/li\u003e\n\u003cli data-end=\"14850\" data-start=\"14807\" data-section-id=\"1q3jecb\"\u003eStore the model with the battery removed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"14994\" data-start=\"14852\"\u003eThe model is not intended for use as a certified fire alarm, smoke detector, heat detector, building-protection system or life-safety device.\u003c\/p\u003e\n\u003ch2 data-end=\"14251\" data-start=\"14204\" data-section-id=\"8xdtun\"\u003eNo Return\/Exchange\/refund\u003c\/h2\u003e","brand":"Go Science","offers":[{"title":"Default Title","offer_id":45642661429295,"sku":"2671814292802","price":649.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/4442\/3471\/files\/Go_Science_Classroom_Series_Fire_Alarm_Using_Flame_Sensor_School_Project_Demonstration_Model_kit_box_front_image.jpg?v=1784570786"},{"product_id":"soil-moisture-detection-school-project-and-demonstration-kit","title":"Smart Soil Moisture Detection School project \u0026 demonstration kit using Sensor Go Science Classroom Series","description":"\u003ch1 data-section-id=\"15or0hs\" data-start=\"595\" data-end=\"655\" class=\"PDq2pG_selectionAnchorContainer\"\u003eSmart Soil Moisture Detection Using Soil Moisture Sensor Go Science Classroom Series\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003ch2 data-section-id=\"7zs5vb\" data-start=\"656\" data-end=\"717\"\u003ePre-Wired Smart Farming School Project \u0026amp; Demonstration Kit\u003c\/h2\u003e\n\u003ch3 data-section-id=\"lm21ma\" data-start=\"719\" data-end=\"771\"\u003eSee soil conditions become an electronic signal.\u003c\/h3\u003e\n\u003cp data-start=\"773\" data-end=\"886\"\u003eTurn soil moisture, electrical conductivity and electronic switching into a live, observable learning experience.\u003c\/p\u003e\n\u003cp data-start=\"773\" data-end=\"886\"\u003e\u003ciframe width=\"1012\" height=\"569\" src=\"https:\/\/www.youtube.com\/embed\/Cgluj3yZOgs\" title=\"\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp data-start=\"773\" data-end=\"886\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"888\" data-end=\"1115\"\u003eThe \u003cstrong data-start=\"892\" data-end=\"959\"\u003eGo Science Classroom Series Smart Soil Moisture Detection Model\u003c\/strong\u003e brings a soil-moisture probe, comparator module, BC547 transistor switching circuit and audible buzzer together on one complete pre-wired working platform.\u003c\/p\u003e\n\u003cp data-start=\"1117\" data-end=\"1265\"\u003eStudents can prepare separate dry and wet soil samples, move the probe between them and observe how the system responds to changing soil conditions:\u003c\/p\u003e\n\u003cp data-start=\"1267\" data-end=\"1344\"\u003e\u003cstrong data-start=\"1267\" data-end=\"1344\"\u003eCheck the Soil → Compare Moisture → Switch the Circuit → Produce an Alert\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1346\" data-end=\"1386\"\u003eIn the model’s configured demonstration:\u003c\/p\u003e\n\u003cp data-start=\"1388\" data-end=\"1438\"\u003e\u003cstrong data-start=\"1388\" data-end=\"1411\"\u003eDry Soil → Alarm On\u003c\/strong\u003e\u003cbr data-start=\"1411\" data-end=\"1414\"\u003e\u003cstrong data-start=\"1414\" data-end=\"1438\"\u003eWet Soil → Alarm Off\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1440\" data-end=\"1768\"\u003eThe model helps students explore how soil conditions can be sensed, compared against an adjustable threshold and converted into an automatic electronic response. It provides a practical foundation for understanding soil-moisture monitoring, electrical conductivity, transistor switching, smart farming and responsible water use.\u003c\/p\u003e\n\u003cp data-start=\"1770\" data-end=\"2035\"\u003eDesigned for \u003cstrong data-start=\"1783\" data-end=\"1798\"\u003eGrades 7–12\u003c\/strong\u003e, the model is suitable for school projects, science exhibitions, classroom demonstrations, practical electronics activities and smart-agriculture presentations.\u003c\/p\u003e\n\u003ch1 data-section-id=\"nh62sj\" data-start=\"23683\" data-end=\"23707\"\u003eProduct Specifications\u003c\/h1\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"23709\" data-end=\"24416\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"23709\" data-end=\"23736\"\u003e\n\u003ctr data-start=\"23709\" data-end=\"23736\"\u003e\n\u003cth data-start=\"23709\" data-end=\"23725\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"23725\" data-end=\"23736\" data-col-size=\"md\" class=\"last:pe-10\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"23747\" data-end=\"24416\"\u003e\n\u003ctr data-start=\"23747\" data-end=\"23791\"\u003e\n\u003ctd data-start=\"23747\" data-end=\"23762\" data-col-size=\"sm\"\u003eProduct type\u003c\/td\u003e\n\u003ctd data-start=\"23762\" data-end=\"23791\" data-col-size=\"md\"\u003eEducational working model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23792\" data-end=\"23828\"\u003e\n\u003ctd data-start=\"23792\" data-end=\"23813\" data-col-size=\"sm\"\u003eRecommended grades\u003c\/td\u003e\n\u003ctd data-start=\"23813\" data-end=\"23828\" data-col-size=\"md\"\u003eGrades 7–12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23829\" data-end=\"23869\"\u003e\n\u003ctd data-start=\"23829\" data-end=\"23846\" data-col-size=\"sm\"\u003ePrimary sensor\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"23846\" data-end=\"23869\"\u003eSoil-moisture probe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23870\" data-end=\"23919\"\u003e\n\u003ctd data-start=\"23870\" data-end=\"23887\" data-col-size=\"sm\"\u003eControl module\u003c\/td\u003e\n\u003ctd data-start=\"23887\" data-end=\"23919\" data-col-size=\"md\"\u003eAdjustable comparator module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23920\" data-end=\"23966\"\u003e\n\u003ctd data-start=\"23920\" data-end=\"23942\" data-col-size=\"sm\"\u003eSwitching component\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"23942\" data-end=\"23966\"\u003eBC547 NPN transistor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23967\" data-end=\"23996\"\u003e\n\u003ctd data-start=\"23967\" data-end=\"23976\" data-col-size=\"sm\"\u003eOutput\u003c\/td\u003e\n\u003ctd data-start=\"23976\" data-end=\"23996\" data-col-size=\"md\"\u003e5V active buzzer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23997\" data-end=\"24058\"\u003e\n\u003ctd data-start=\"23997\" data-end=\"24024\" data-col-size=\"sm\"\u003eDemonstration conditions\u003c\/td\u003e\n\u003ctd data-start=\"24024\" data-end=\"24058\" data-col-size=\"md\"\u003eUser-prepared dry and wet soil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"24059\" data-end=\"24110\"\u003e\n\u003ctd data-start=\"24059\" data-end=\"24081\" data-col-size=\"sm\"\u003eContainers included\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"24081\" data-end=\"24110\"\u003eYes, two empty containers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"24111\" data-end=\"24133\"\u003e\n\u003ctd data-start=\"24111\" data-end=\"24127\" data-col-size=\"sm\"\u003eSoil included\u003c\/td\u003e\n\u003ctd data-start=\"24127\" data-end=\"24133\" data-col-size=\"md\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"24134\" data-end=\"24171\"\u003e\n\u003ctd data-start=\"24134\" data-end=\"24153\" data-col-size=\"sm\"\u003eBattery required\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"24153\" data-end=\"24171\"\u003eOne 9V battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"24172\" data-end=\"24197\"\u003e\n\u003ctd data-start=\"24172\" data-end=\"24191\" data-col-size=\"sm\"\u003eBattery included\u003c\/td\u003e\n\u003ctd data-start=\"24191\" data-end=\"24197\" data-col-size=\"md\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"24198\" data-end=\"24245\"\u003e\n\u003ctd data-start=\"24198\" data-end=\"24215\" data-col-size=\"sm\"\u003eDigital manual\u003c\/td\u003e\n\u003ctd data-start=\"24215\" data-end=\"24245\" data-col-size=\"md\"\u003eIncluded through QR access\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"24246\" data-end=\"24316\"\u003e\n\u003ctd data-start=\"24246\" data-end=\"24268\" data-col-size=\"sm\"\u003eVideo demonstration\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"24268\" data-end=\"24316\"\u003eIncluded through gallery, YouTube and box QR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"24317\" data-end=\"24360\"\u003e\n\u003ctd data-start=\"24317\" data-end=\"24342\" data-col-size=\"sm\"\u003eApproximate dimensions\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"24342\" data-end=\"24360\"\u003e16 × 11 × 5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"24361\" data-end=\"24416\"\u003e\n\u003ctd data-start=\"24361\" data-end=\"24376\" data-col-size=\"sm\"\u003eIntended use\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"24376\" data-end=\"24416\"\u003eSupervised educational demonstration, School project\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"24418\" data-end=\"24615\"\u003eThe supplied documentation confirms the electronic components, dimensions, battery requirement and demonstration process.\u003c\/p\u003e\n\u003ch1 data-section-id=\"cdsp2y\" data-start=\"2042\" data-end=\"2081\"\u003eA Complete Guided Learning Experience\u003c\/h1\u003e\n\u003ch2 data-section-id=\"19qh524\" data-start=\"2083\" data-end=\"2154\"\u003eWorking model, digital manual and video demonstration—all connected.\u003c\/h2\u003e\n\u003cp data-start=\"2156\" data-end=\"2310\"\u003eEvery Go Science Classroom Series kit is supported by a guided learning experience that helps students understand, test and confidently present the model.\u003c\/p\u003e\n\u003cp data-start=\"2312\" data-end=\"2340\"\u003eThis kit includes access to:\u003c\/p\u003e\n\u003cul data-start=\"2342\" data-end=\"2698\"\u003e\n\u003cli data-section-id=\"12k1qd3\" data-start=\"2342\" data-end=\"2393\"\u003eA detailed full-colour digital instruction manual\u003c\/li\u003e\n\u003cli data-section-id=\"s8g5m3\" data-start=\"2394\" data-end=\"2452\"\u003eIllustrated component and working-principle explanations\u003c\/li\u003e\n\u003cli data-section-id=\"1runxt8\" data-start=\"2453\" data-end=\"2500\"\u003eStep-by-step setup and demonstration guidance\u003c\/li\u003e\n\u003cli data-section-id=\"1jrdr8q\" data-start=\"2501\" data-end=\"2554\"\u003eA complete video demonstration of the working model\u003c\/li\u003e\n\u003cli data-section-id=\"66badr\" data-start=\"2555\" data-end=\"2605\"\u003eQR access for convenient viewing and downloading\u003c\/li\u003e\n\u003cli data-section-id=\"6lea8i\" data-start=\"2606\" data-end=\"2652\"\u003eSafety, care and troubleshooting information\u003c\/li\u003e\n\u003cli data-section-id=\"i3obxa\" data-start=\"2653\" data-end=\"2698\"\u003eConcept recap and Certificate of Completion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2700\" data-end=\"2758\"\u003eThe learning journey is designed to take students through:\u003c\/p\u003e\n\u003cp data-start=\"2760\" data-end=\"2840\"\u003e\u003cstrong data-start=\"2760\" data-end=\"2840\"\u003eExplore → Understand → Prepare → Watch → Test → Observe → Explain → Complete\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2842\" data-end=\"3087\"\u003eStudents can first understand the model through the manual and video, then operate it under supervision, repeat the demonstration, record observations and use the learning material while preparing for a school presentation or science exhibition.\u003c\/p\u003e\n\u003ch1 data-section-id=\"uc35dk\" data-start=\"3094\" data-end=\"3140\"\u003eDetailed Full-Colour Digital Manual Included\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1v8fnau\" data-start=\"3142\" data-end=\"3184\"\u003eScan, learn and return whenever needed.\u003c\/h2\u003e\n\u003cp data-start=\"3186\" data-end=\"3293\"\u003eA QR code supplied inside the kit provides access to the dedicated digital instruction and learning manual.\u003c\/p\u003e\n\u003cp data-start=\"3295\" data-end=\"3396\"\u003eStudents can open the manual on a phone, tablet or computer and download it for future access during:\u003c\/p\u003e\n\u003cul data-start=\"3398\" data-end=\"3587\"\u003e\n\u003cli data-section-id=\"15f03x6\" data-start=\"3398\" data-end=\"3427\"\u003eInitial project preparation\u003c\/li\u003e\n\u003cli data-section-id=\"18qs540\" data-start=\"3428\" data-end=\"3441\"\u003eModel setup\u003c\/li\u003e\n\u003cli data-section-id=\"12uzkgd\" data-start=\"3442\" data-end=\"3462\"\u003eClassroom learning\u003c\/li\u003e\n\u003cli data-section-id=\"1r1jg2w\" data-start=\"3463\" data-end=\"3481\"\u003eRepeated testing\u003c\/li\u003e\n\u003cli data-section-id=\"37hn7n\" data-start=\"3482\" data-end=\"3514\"\u003eScience-exhibition preparation\u003c\/li\u003e\n\u003cli data-section-id=\"1vdr806\" data-start=\"3515\" data-end=\"3539\"\u003eProject-report writing\u003c\/li\u003e\n\u003cli data-section-id=\"15rfreh\" data-start=\"3540\" data-end=\"3558\"\u003eViva preparation\u003c\/li\u003e\n\u003cli data-section-id=\"1j1lfo5\" data-start=\"3559\" data-end=\"3587\"\u003eRevision and concept recap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3589\" data-end=\"3718\"\u003eThe current manual contains \u003cstrong data-start=\"3617\" data-end=\"3652\"\u003e18 colourful, illustrated pages\u003c\/strong\u003e created specifically for the Smart Soil Moisture Detection model.\u003c\/p\u003e\n\u003cp data-start=\"3720\" data-end=\"3732\"\u003eIt includes:\u003c\/p\u003e\n\u003cul data-start=\"3734\" data-end=\"4182\"\u003e\n\u003cli data-section-id=\"k0cysw\" data-start=\"3734\" data-end=\"3770\"\u003eA visual introduction to the model\u003c\/li\u003e\n\u003cli data-section-id=\"chofvq\" data-start=\"3771\" data-end=\"3816\"\u003eA complete guide to the supplied components\u003c\/li\u003e\n\u003cli data-section-id=\"1jaxau3\" data-start=\"3817\" data-end=\"3857\"\u003eExplanation of the soil-moisture probe\u003c\/li\u003e\n\u003cli data-section-id=\"k0zcj8\" data-start=\"3858\" data-end=\"3885\"\u003eComparator-module working\u003c\/li\u003e\n\u003cli data-section-id=\"v9hpve\" data-start=\"3886\" data-end=\"3923\"\u003eBC547 transistor-switching concepts\u003c\/li\u003e\n\u003cli data-section-id=\"a0zdeb\" data-start=\"3924\" data-end=\"3958\"\u003eWet-soil and dry-soil comparison\u003c\/li\u003e\n\u003cli data-section-id=\"55jebk\" data-start=\"3959\" data-end=\"4012\"\u003eIllustrated step-by-step demonstration instructions\u003c\/li\u003e\n\u003cli data-section-id=\"18b0q38\" data-start=\"4013\" data-end=\"4044\"\u003eSafety and operating guidance\u003c\/li\u003e\n\u003cli data-section-id=\"n1um3j\" data-start=\"4045\" data-end=\"4095\"\u003eSmart-farming and water-conservation connections\u003c\/li\u003e\n\u003cli data-section-id=\"sdg2wu\" data-start=\"4096\" data-end=\"4128\"\u003eFun facts and learning prompts\u003c\/li\u003e\n\u003cli data-section-id=\"1rf3i7h\" data-start=\"4129\" data-end=\"4144\"\u003eConcept recap\u003c\/li\u003e\n\u003cli data-section-id=\"m72qjv\" data-start=\"4145\" data-end=\"4182\"\u003ePrintable Certificate of Completion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4184\" data-end=\"4515\"\u003eThe manual’s component guide appears on page 5, the working sequence and wet-versus-dry comparison on pages 6–7, the illustrated operating steps on pages 8–11, learning facts on pages 12–13, safety guidance on page 14, the concept recap on page 15 and the Certificate of Completion on page 17.\u003c\/p\u003e\n\u003ch1 data-section-id=\"19mroy9\" data-start=\"4522\" data-end=\"4565\"\u003eStep-by-Step Video Demonstration Included\u003c\/h1\u003e\n\u003ch2 data-section-id=\"g98ii3\" data-start=\"4567\" data-end=\"4617\"\u003eWatch the actual model before running the test.\u003c\/h2\u003e\n\u003cp data-start=\"4619\" data-end=\"4728\"\u003eEvery kit also provides access to a dedicated video demonstration showing the model and its working sequence.\u003c\/p\u003e\n\u003cp data-start=\"4730\" data-end=\"4775\"\u003eThe video helps students visually understand:\u003c\/p\u003e\n\u003cul data-start=\"4777\" data-end=\"5128\"\u003e\n\u003cli data-section-id=\"t7qbu5\" data-start=\"4777\" data-end=\"4804\"\u003eThe complete model layout\u003c\/li\u003e\n\u003cli data-section-id=\"abmh4x\" data-start=\"4805\" data-end=\"4830\"\u003eThe soil-moisture probe\u003c\/li\u003e\n\u003cli data-section-id=\"1bfqndp\" data-start=\"4831\" data-end=\"4866\"\u003eThe comparator and driver circuit\u003c\/li\u003e\n\u003cli data-section-id=\"ssr8q4\" data-start=\"4867\" data-end=\"4901\"\u003eThe two demonstration containers\u003c\/li\u003e\n\u003cli data-section-id=\"2is6a\" data-start=\"4902\" data-end=\"4933\"\u003eCorrect 9V battery connection\u003c\/li\u003e\n\u003cli data-section-id=\"1nw86uu\" data-start=\"4934\" data-end=\"4975\"\u003ePreparation of wet and dry soil samples\u003c\/li\u003e\n\u003cli data-section-id=\"m37e5n\" data-start=\"4976\" data-end=\"4993\"\u003eProbe placement\u003c\/li\u003e\n\u003cli data-section-id=\"1kq8ti8\" data-start=\"4994\" data-end=\"5017\"\u003eThe wet-soil response\u003c\/li\u003e\n\u003cli data-section-id=\"c5rptm\" data-start=\"5018\" data-end=\"5047\"\u003eThe dry-soil alarm response\u003c\/li\u003e\n\u003cli data-section-id=\"1iimhta\" data-start=\"5048\" data-end=\"5085\"\u003eHow to move between test conditions\u003c\/li\u003e\n\u003cli data-section-id=\"148guki\" data-start=\"5086\" data-end=\"5128\"\u003eHow to conclude the demonstration safely\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"5130\" data-end=\"5195\"\u003eThe demonstration video can be accessed in three convenient ways:\u003c\/p\u003e\n\u003ch3 data-section-id=\"1nmiu3p\" data-start=\"5197\" data-end=\"5216\"\u003eProduct Gallery\u003c\/h3\u003e\n\u003cp data-start=\"5218\" data-end=\"5378\"\u003eThe video is included with the product images on the Go Science product page, allowing parents, teachers and students to view the working model before purchase.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1iuekfw\" data-start=\"5380\" data-end=\"5410\"\u003eGo Science YouTube Channel\u003c\/h3\u003e\n\u003cp data-start=\"5412\" data-end=\"5542\"\u003eThe demonstration is also available through the official Go Science YouTube presence for convenient viewing, sharing and revision.\u003c\/p\u003e\n\u003ch3 data-section-id=\"mu6kxf\" data-start=\"5544\" data-end=\"5570\"\u003eQR Code on the Kit Box\u003c\/h3\u003e\n\u003cp data-start=\"5572\" data-end=\"5671\"\u003eA QR code printed on the side of the product box provides direct access to the demonstration video.\u003c\/p\u003e\n\u003cp data-start=\"5673\" data-end=\"5760\"\u003eStudents can scan the code whenever they need to revisit the setup or working sequence.\u003c\/p\u003e\n\u003cp data-start=\"5762\" data-end=\"5828\"\u003eThis makes support available before, during and after the project:\u003c\/p\u003e\n\u003cp data-start=\"5830\" data-end=\"5880\"\u003e\u003cstrong data-start=\"5830\" data-end=\"5880\"\u003eScan → Watch → Prepare → Demonstrate → Rewatch\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"5882\" data-end=\"5972\"\u003eInternet access and a compatible QR-scanning device are required to open the online video.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1hjr29d\" data-start=\"22373\" data-end=\"22393\"\u003eWhat’s in the preassembled Kit?\u003c\/h1\u003e\n\u003cul data-start=\"22395\" data-end=\"23151\"\u003e\n\u003cli data-section-id=\"1f6019q\" data-start=\"22395\" data-end=\"22423\"\u003eSoil-moisture sensor probe\u003c\/li\u003e\n\u003cli data-section-id=\"1s084mr\" data-start=\"22424\" data-end=\"22481\"\u003eComparator control module with adjustable potentiometer\u003c\/li\u003e\n\u003cli data-section-id=\"n07chm\" data-start=\"22482\" data-end=\"22519\"\u003eCustom general-purpose driver board\u003c\/li\u003e\n\u003cli data-section-id=\"17tk8bu\" data-start=\"22520\" data-end=\"22560\"\u003eBC547 NPN transistor-switching circuit\u003c\/li\u003e\n\u003cli data-section-id=\"1i8s15z\" data-start=\"22561\" data-end=\"22579\"\u003e5V active buzzer\u003c\/li\u003e\n\u003cli data-section-id=\"ifabg4\" data-start=\"22580\" data-end=\"22621\"\u003eTwo empty soil-demonstration containers\u003c\/li\u003e\n\u003cli data-section-id=\"zjevfo\" data-start=\"22622\" data-end=\"22656\"\u003ePre-wired electrical connections\u003c\/li\u003e\n\u003cli data-section-id=\"myf71m\" data-start=\"22657\" data-end=\"22681\"\u003eBattery snap connector\u003c\/li\u003e\n\u003cli data-section-id=\"11gqn54\" data-start=\"22682\" data-end=\"22713\"\u003eWooden component-support base\u003c\/li\u003e\n\u003cli data-section-id=\"133sdq5\" data-start=\"22714\" data-end=\"22750\"\u003eDecorative artificial-grass layout\u003c\/li\u003e\n\u003cli data-section-id=\"19u4i7m\" data-start=\"22751\" data-end=\"22791\"\u003eReady-to-use educational working model\u003c\/li\u003e\n\u003cli data-section-id=\"1a44xy5\" data-start=\"22792\" data-end=\"22834\"\u003eQR access to the detailed digital manual\u003c\/li\u003e\n\u003cli data-section-id=\"lqau8x\" data-start=\"22835\" data-end=\"22892\"\u003eDetailed 18-page full-colour digital instruction manual\u003c\/li\u003e\n\u003cli data-section-id=\"1gzewut\" data-start=\"22893\" data-end=\"22948\"\u003eQR access to the video demonstration from the kit box\u003c\/li\u003e\n\u003cli data-section-id=\"18cz6pz\" data-start=\"22949\" data-end=\"22983\"\u003eStep-by-step video demonstration\u003c\/li\u003e\n\u003cli data-section-id=\"1frz05\" data-start=\"22984\" data-end=\"23014\"\u003eIllustrated testing guidance\u003c\/li\u003e\n\u003cli data-section-id=\"1k61quu\" data-start=\"23015\" data-end=\"23061\"\u003eComponent and working-principle explanations\u003c\/li\u003e\n\u003cli data-section-id=\"61qkjs\" data-start=\"23062\" data-end=\"23105\"\u003eSafety, care and troubleshooting guidance\u003c\/li\u003e\n\u003cli data-section-id=\"i3obxa\" data-start=\"23106\" data-end=\"23151\"\u003eConcept recap and Certificate of Completion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-section-id=\"1rc8kfz\" data-start=\"23158\" data-end=\"23179\"\u003eRequired Separately\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1kc5asn\" data-start=\"23181\" data-end=\"23194\"\u003e9V Battery\u003c\/h2\u003e\n\u003cp data-start=\"23196\" data-end=\"23236\"\u003eThe model requires one fresh 9V battery.\u003c\/p\u003e\n\u003cp data-start=\"23238\" data-end=\"23266\"\u003e\u003cstrong data-start=\"23238\" data-end=\"23266\"\u003eBattery is not included.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 data-section-id=\"xt59fv\" data-start=\"23268\" data-end=\"23295\"\u003eDry and Wet Soil Samples\u003c\/h2\u003e\n\u003cp data-start=\"23297\" data-end=\"23331\"\u003eSoil is not supplied with the kit.\u003c\/p\u003e\n\u003cp data-start=\"23333\" data-end=\"23352\"\u003eUsers must prepare:\u003c\/p\u003e\n\u003cul data-start=\"23354\" data-end=\"23437\"\u003e\n\u003cli data-section-id=\"1sdv0zy\" data-start=\"23354\" data-end=\"23407\"\u003eOne suitable dry soil, dry earth or dry sand sample\u003c\/li\u003e\n\u003cli data-section-id=\"1d8z2me\" data-start=\"23408\" data-end=\"23437\"\u003eOne evenly damp soil sample\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"23439\" data-end=\"23520\"\u003eOnly small quantities are required for the two supplied demonstration containers.\u003c\/p\u003e\n\u003cp data-start=\"23522\" data-end=\"23676\"\u003eThe soil shown in product photographs, packaging artwork, manuals and videos is used to illustrate the demonstration and is not included with the product.\u003c\/p\u003e\n\u003ch1 data-section-id=\"558def\" data-start=\"5979\" data-end=\"6029\"\u003eLearn Before, During and After the Demonstration\u003c\/h1\u003e\n\u003ch2 data-section-id=\"kockww\" data-start=\"6031\" data-end=\"6058\"\u003eBefore the Demonstration\u003c\/h2\u003e\n\u003cp data-start=\"6060\" data-end=\"6073\"\u003eStudents can:\u003c\/p\u003e\n\u003cul data-start=\"6075\" data-end=\"6317\"\u003e\n\u003cli data-section-id=\"7z06io\" data-start=\"6075\" data-end=\"6101\"\u003eWatch the complete video\u003c\/li\u003e\n\u003cli data-section-id=\"1c0gjpf\" data-start=\"6102\" data-end=\"6127\"\u003eRead the digital manual\u003c\/li\u003e\n\u003cli data-section-id=\"ld6fzy\" data-start=\"6128\" data-end=\"6154\"\u003eIdentify every component\u003c\/li\u003e\n\u003cli data-section-id=\"8hw4k6\" data-start=\"6155\" data-end=\"6198\"\u003ePrepare suitable dry and wet soil samples\u003c\/li\u003e\n\u003cli data-section-id=\"w44uyx\" data-start=\"6199\" data-end=\"6239\"\u003eUnderstand correct battery orientation\u003c\/li\u003e\n\u003cli data-section-id=\"16qd9ud\" data-start=\"6240\" data-end=\"6276\"\u003eReview the wet-versus-dry response\u003c\/li\u003e\n\u003cli data-section-id=\"1om0sbw\" data-start=\"6277\" data-end=\"6317\"\u003eLearn the safety and care instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"3854je\" data-start=\"6319\" data-end=\"6346\"\u003eDuring the Demonstration\u003c\/h2\u003e\n\u003cp data-start=\"6348\" data-end=\"6361\"\u003eStudents can:\u003c\/p\u003e\n\u003cul data-start=\"6363\" data-end=\"6632\"\u003e\n\u003cli data-section-id=\"1l7xzq\" data-start=\"6363\" data-end=\"6400\"\u003eFollow the illustrated instructions\u003c\/li\u003e\n\u003cli data-section-id=\"1tqcf2a\" data-start=\"6401\" data-end=\"6430\"\u003eRefer to the video sequence\u003c\/li\u003e\n\u003cli data-section-id=\"1t8j0lj\" data-start=\"6431\" data-end=\"6459\"\u003eInsert the probe correctly\u003c\/li\u003e\n\u003cli data-section-id=\"7fxm5f\" data-start=\"6460\" data-end=\"6493\"\u003eCompare the two soil conditions\u003c\/li\u003e\n\u003cli data-section-id=\"1h9d6ki\" data-start=\"6494\" data-end=\"6527\"\u003eObserve the comparator response\u003c\/li\u003e\n\u003cli data-section-id=\"13m1coi\" data-start=\"6528\" data-end=\"6561\"\u003eListen for the dry-soil warning\u003c\/li\u003e\n\u003cli data-section-id=\"1ir12bp\" data-start=\"6562\" data-end=\"6592\"\u003eMove between test conditions\u003c\/li\u003e\n\u003cli data-section-id=\"uib35y\" data-start=\"6593\" data-end=\"6632\"\u003eRepeat the activity under supervision\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1b727ih\" data-start=\"6634\" data-end=\"6660\"\u003eDuring the Presentation\u003c\/h2\u003e\n\u003cp data-start=\"6662\" data-end=\"6721\"\u003eStudents can use the supplied learning material to explain:\u003c\/p\u003e\n\u003cul data-start=\"6723\" data-end=\"6956\"\u003e\n\u003cli data-section-id=\"sfkrx5\" data-start=\"6723\" data-end=\"6746\"\u003eSoil-moisture sensing\u003c\/li\u003e\n\u003cli data-section-id=\"1i5wxmh\" data-start=\"6747\" data-end=\"6772\"\u003eElectrical conductivity\u003c\/li\u003e\n\u003cli data-section-id=\"1i10pan\" data-start=\"6773\" data-end=\"6797\"\u003eResistance differences\u003c\/li\u003e\n\u003cli data-section-id=\"1fxv32e\" data-start=\"6798\" data-end=\"6821\"\u003eComparator thresholds\u003c\/li\u003e\n\u003cli data-section-id=\"bkk33h\" data-start=\"6822\" data-end=\"6838\"\u003eDigital output\u003c\/li\u003e\n\u003cli data-section-id=\"ymi66c\" data-start=\"6839\" data-end=\"6867\"\u003eBC547 transistor switching\u003c\/li\u003e\n\u003cli data-section-id=\"1j49ae\" data-start=\"6868\" data-end=\"6893\"\u003eAudible warning systems\u003c\/li\u003e\n\u003cli data-section-id=\"hkqe8d\" data-start=\"6894\" data-end=\"6922\"\u003eSmart-farming applications\u003c\/li\u003e\n\u003cli data-section-id=\"1bgjait\" data-start=\"6923\" data-end=\"6956\"\u003eResponsible irrigation concepts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"17rgp99\" data-start=\"6958\" data-end=\"6984\"\u003eAfter the Demonstration\u003c\/h2\u003e\n\u003cp data-start=\"6986\" data-end=\"6999\"\u003eStudents can:\u003c\/p\u003e\n\u003cul data-start=\"7001\" data-end=\"7209\"\u003e\n\u003cli data-section-id=\"1nb87e6\" data-start=\"7001\" data-end=\"7027\"\u003eReview the concept recap\u003c\/li\u003e\n\u003cli data-section-id=\"1p58i4q\" data-start=\"7028\" data-end=\"7055\"\u003eRewatch the demonstration\u003c\/li\u003e\n\u003cli data-section-id=\"imivit\" data-start=\"7056\" data-end=\"7091\"\u003eRevisit the troubleshooting guide\u003c\/li\u003e\n\u003cli data-section-id=\"1ewhr65\" data-start=\"7092\" data-end=\"7127\"\u003ePrepare their project explanation\u003c\/li\u003e\n\u003cli data-section-id=\"1k47d88\" data-start=\"7128\" data-end=\"7159\"\u003eComplete their project report\u003c\/li\u003e\n\u003cli data-section-id=\"12ppub5\" data-start=\"7160\" data-end=\"7209\"\u003eDownload or print the Certificate of Completion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-section-id=\"1rda9dp\" data-start=\"7216\" data-end=\"7254\"\u003eFrom Soil Condition to Audible Alert\u003c\/h1\u003e\n\u003ch2 data-section-id=\"hy085y\" data-start=\"7256\" data-end=\"7319\"\u003eExplore how sensing, comparison and switching work together.\u003c\/h2\u003e\n\u003cp data-start=\"7321\" data-end=\"7399\"\u003eThe model presents soil-moisture detection as one connected functional system.\u003c\/p\u003e\n\u003cp data-start=\"7401\" data-end=\"7708\"\u003eThe probe responds to the electrical condition of the prepared soil sample. The comparator module evaluates that response against an adjustable threshold. Its output then controls a BC547 transistor switching circuit, which determines whether the active buzzer remains silent or produces a dry-soil warning.\u003c\/p\u003e\n\u003cp data-start=\"7710\" data-end=\"7751\"\u003eStudents can follow the complete pathway:\u003c\/p\u003e\n\u003cp data-start=\"7753\" data-end=\"7811\"\u003e\u003cstrong data-start=\"7753\" data-end=\"7811\"\u003eSoil → Probe → Comparator → Transistor Switch → Buzzer\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"7813\" data-end=\"7958\"\u003eEach component performs a specific role, allowing students to understand how multiple electronic stages combine to produce an automatic response.\u003c\/p\u003e\n\u003chr data-start=\"7960\" data-end=\"7963\"\u003e\n\u003ch1 data-section-id=\"c01vee\" data-start=\"7965\" data-end=\"7999\"\u003ePre-Wired for Direct Exploration\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1sfjur0\" data-start=\"8001\" data-end=\"8045\"\u003eBegin with a complete working foundation.\u003c\/h2\u003e\n\u003cp data-start=\"8047\" data-end=\"8215\"\u003eThe sensing probe, comparator module, transistor driver circuit, buzzer and battery connection are integrated into a pre-wired and pre-assembled demonstration platform.\u003c\/p\u003e\n\u003cp data-start=\"8217\" data-end=\"8302\"\u003eThis working foundation allows students to move directly into meaningful exploration:\u003c\/p\u003e\n\u003cul data-start=\"8304\" data-end=\"8781\"\u003e\n\u003cli data-section-id=\"apikx7\" data-start=\"8304\" data-end=\"8350\"\u003ePrepare and compare dry and wet soil samples\u003c\/li\u003e\n\u003cli data-section-id=\"15e6qbi\" data-start=\"8351\" data-end=\"8393\"\u003eObserve the sensor and module indicators\u003c\/li\u003e\n\u003cli data-section-id=\"17lv0po\" data-start=\"8394\" data-end=\"8433\"\u003eFollow the signal through every stage\u003c\/li\u003e\n\u003cli data-section-id=\"1vbfi2m\" data-start=\"8434\" data-end=\"8461\"\u003eHear the dry-soil warning\u003c\/li\u003e\n\u003cli data-section-id=\"8bc6vg\" data-start=\"8462\" data-end=\"8495\"\u003eConduct repeated demonstrations\u003c\/li\u003e\n\u003cli data-section-id=\"1cody8w\" data-start=\"8496\" data-end=\"8551\"\u003eObserve how threshold adjustment affects the response\u003c\/li\u003e\n\u003cli data-section-id=\"1w6ag4f\" data-start=\"8552\" data-end=\"8581\"\u003eRecord and compare findings\u003c\/li\u003e\n\u003cli data-section-id=\"1l119d7\" data-start=\"8582\" data-end=\"8623\"\u003eInvestigate changes in system behaviour\u003c\/li\u003e\n\u003cli data-section-id=\"1ddthmq\" data-start=\"8624\" data-end=\"8666\"\u003eUnderstand the purpose of each component\u003c\/li\u003e\n\u003cli data-section-id=\"1i9j9c5\" data-start=\"8667\" data-end=\"8702\"\u003eTroubleshoot unexpected responses\u003c\/li\u003e\n\u003cli data-section-id=\"1chop77\" data-start=\"8703\" data-end=\"8743\"\u003eExplain the complete model confidently\u003c\/li\u003e\n\u003cli data-section-id=\"1v6rmnp\" data-start=\"8744\" data-end=\"8781\"\u003eDevelop further smart-farming ideas\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"8783\" data-end=\"8811\"\u003eThe model is designed to be:\u003c\/p\u003e\n\u003cp data-start=\"8813\" data-end=\"8883\"\u003e\u003cstrong data-start=\"8813\" data-end=\"8883\"\u003eObserved → Tested → Retested → Understood → Explained → Built Upon\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch1 data-section-id=\"19y3zfv\" data-start=\"8890\" data-end=\"8925\"\u003eWatch the Complete System Respond\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1dsemj2\" data-start=\"8927\" data-end=\"8957\"\u003e1. Prepare the Soil Samples\u003c\/h2\u003e\n\u003cp data-start=\"8959\" data-end=\"9067\"\u003ePrepare one container with sufficiently dry soil or dry sand and the second container with evenly damp soil.\u003c\/p\u003e\n\u003cp data-start=\"9069\" data-end=\"9140\"\u003eThe soil samples are used to create two contrasting testing conditions.\u003c\/p\u003e\n\u003ch2 data-section-id=\"lttxbz\" data-start=\"9142\" data-end=\"9162\"\u003e2. Check the Soil\u003c\/h2\u003e\n\u003cp data-start=\"9164\" data-end=\"9227\"\u003eInsert the soil-moisture probe gently into one prepared sample.\u003c\/p\u003e\n\u003cp data-start=\"9229\" data-end=\"9342\"\u003eIts exposed conductive tracks interact with the surrounding soil and respond to the electrical path between them.\u003c\/p\u003e\n\u003ch2 data-section-id=\"dptypn\" data-start=\"9344\" data-end=\"9380\"\u003e3. Compare the Moisture Condition\u003c\/h2\u003e\n\u003cp data-start=\"9382\" data-end=\"9436\"\u003eThe probe sends its response to the comparator module.\u003c\/p\u003e\n\u003cp data-start=\"9438\" data-end=\"9547\"\u003eThe module compares the probe response against the threshold selected through its onboard adjustment control.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1u3sp2z\" data-start=\"9549\" data-end=\"9577\"\u003e4. Send the Output Signal\u003c\/h2\u003e\n\u003cp data-start=\"9579\" data-end=\"9693\"\u003eAfter comparing the condition with the selected threshold, the comparator module changes its digital output state.\u003c\/p\u003e\n\u003cp data-start=\"9695\" data-end=\"9756\"\u003eThis output is directed toward the transistor driver circuit.\u003c\/p\u003e\n\u003ch2 data-section-id=\"8x0izq\" data-start=\"9758\" data-end=\"9782\"\u003e5. Switch the Circuit\u003c\/h2\u003e\n\u003cp data-start=\"9784\" data-end=\"9883\"\u003eThe signal reaches the custom general-purpose driver board containing the \u003cstrong data-start=\"9858\" data-end=\"9882\"\u003eBC547 NPN transistor\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"9885\" data-end=\"9963\"\u003eThe transistor operates as an electronic switch controlling the active buzzer.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1rmn9b1\" data-start=\"9965\" data-end=\"9991\"\u003e6. Produce the Response\u003c\/h2\u003e\n\u003cp data-start=\"9993\" data-end=\"10135\"\u003eWhen the probe is placed in the prepared dry-soil sample, the model’s configured circuit activates the buzzer and produces an audible warning.\u003c\/p\u003e\n\u003cp data-start=\"10137\" data-end=\"10244\"\u003eWhen the probe is placed in sufficiently wet soil, the circuit changes state and the buzzer remains silent.\u003c\/p\u003e\n\u003cp data-start=\"10246\" data-end=\"10271\"\u003eThe complete response is:\u003c\/p\u003e\n\u003cp data-start=\"10273\" data-end=\"10361\"\u003e\u003cstrong data-start=\"10273\" data-end=\"10361\"\u003eProbe checks soil → Module compares moisture → Transistor switches → Buzzer responds\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"10363\" data-end=\"10536\"\u003eThe supplied documentation and box artwork confirm the configured dry-soil and wet-soil response.\u003c\/p\u003e\n\u003ch1 data-section-id=\"72izqu\" data-start=\"10543\" data-end=\"10576\"\u003eExplore the Soil-Moisture Probe\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1q7d5so\" data-start=\"10578\" data-end=\"10631\"\u003eObserve how moisture affects electrical behaviour.\u003c\/h2\u003e\n\u003cp data-start=\"10633\" data-end=\"10696\"\u003eThe soil-moisture probe contains two exposed conductive tracks.\u003c\/p\u003e\n\u003cp data-start=\"10698\" data-end=\"10801\"\u003eWhen inserted into soil, the electrical path between these tracks changes according to factors such as:\u003c\/p\u003e\n\u003cul data-start=\"10803\" data-end=\"10961\"\u003e\n\u003cli data-section-id=\"1w961c\" data-start=\"10803\" data-end=\"10819\"\u003eMoisture level\u003c\/li\u003e\n\u003cli data-section-id=\"fkjj6x\" data-start=\"10820\" data-end=\"10838\"\u003eSoil composition\u003c\/li\u003e\n\u003cli data-section-id=\"2co973\" data-start=\"10839\" data-end=\"10852\"\u003eProbe depth\u003c\/li\u003e\n\u003cli data-section-id=\"enhr4r\" data-start=\"10853\" data-end=\"10869\"\u003eProbe position\u003c\/li\u003e\n\u003cli data-section-id=\"1xcfojy\" data-start=\"10870\" data-end=\"10893\"\u003eDistribution of water\u003c\/li\u003e\n\u003cli data-section-id=\"7rtz8j\" data-start=\"10894\" data-end=\"10930\"\u003eContact between the probe and soil\u003c\/li\u003e\n\u003cli data-section-id=\"1junwpv\" data-start=\"10931\" data-end=\"10961\"\u003eComparator threshold setting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"10963\" data-end=\"11118\"\u003eMoist soil generally provides a stronger conductive path between the tracks. Drier soil generally provides greater resistance and a weaker conductive path.\u003c\/p\u003e\n\u003cp data-start=\"11120\" data-end=\"11223\"\u003eThe probe provides the initial input that the comparator module uses to determine the model’s response.\u003c\/p\u003e\n\u003cp data-start=\"11225\" data-end=\"11246\"\u003eStudents can explore:\u003c\/p\u003e\n\u003cul data-start=\"11248\" data-end=\"11503\"\u003e\n\u003cli data-section-id=\"cfgf1b\" data-start=\"11248\" data-end=\"11263\"\u003eSoil moisture\u003c\/li\u003e\n\u003cli data-section-id=\"1xj47yr\" data-start=\"11264\" data-end=\"11293\"\u003eDry and wet soil conditions\u003c\/li\u003e\n\u003cli data-section-id=\"1i5wxmh\" data-start=\"11294\" data-end=\"11319\"\u003eElectrical conductivity\u003c\/li\u003e\n\u003cli data-section-id=\"1t6gcam\" data-start=\"11320\" data-end=\"11340\"\u003eResistance changes\u003c\/li\u003e\n\u003cli data-section-id=\"l3m4gs\" data-start=\"11341\" data-end=\"11367\"\u003eConductive sensor tracks\u003c\/li\u003e\n\u003cli data-section-id=\"8oz888\" data-start=\"11368\" data-end=\"11382\"\u003eSensor input\u003c\/li\u003e\n\u003cli data-section-id=\"z9zj77\" data-start=\"11383\" data-end=\"11413\"\u003eMoisture-dependent behaviour\u003c\/li\u003e\n\u003cli data-section-id=\"oed5wi\" data-start=\"11414\" data-end=\"11446\"\u003eCause-and-effect relationships\u003c\/li\u003e\n\u003cli data-section-id=\"jzq0p8\" data-start=\"11447\" data-end=\"11503\"\u003ePhysical conditions translated into electronic signals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"11505\" data-end=\"11652\"\u003eThis model demonstrates a threshold-based comparison between prepared test samples. It does not provide a calibrated numerical moisture percentage.\u003c\/p\u003e\n\u003ch1 data-section-id=\"gu7who\" data-start=\"11659\" data-end=\"11691\"\u003eDiscover the Comparator Module\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1i4in8z\" data-start=\"11693\" data-end=\"11749\"\u003eSee how a threshold helps the system make a decision.\u003c\/h2\u003e\n\u003cp data-start=\"11751\" data-end=\"11852\"\u003eThe comparator module receives the probe response and compares it with an adjustable reference level.\u003c\/p\u003e\n\u003cp data-start=\"11854\" data-end=\"12023\"\u003eThis introduces an important electronic concept: a sensor may produce a changing response, while a comparator determines when that response crosses a selected threshold.\u003c\/p\u003e\n\u003cp data-start=\"12025\" data-end=\"12046\"\u003eStudents can observe:\u003c\/p\u003e\n\u003cul data-start=\"12048\" data-end=\"12246\"\u003e\n\u003cli data-section-id=\"1eeie4i\" data-start=\"12048\" data-end=\"12079\"\u003eThe probe providing the input\u003c\/li\u003e\n\u003cli data-section-id=\"sojsre\" data-start=\"12080\" data-end=\"12113\"\u003eThe module evaluating the input\u003c\/li\u003e\n\u003cli data-section-id=\"qncnt0\" data-start=\"12114\" data-end=\"12144\"\u003eThe indicator changing state\u003c\/li\u003e\n\u003cli data-section-id=\"gf73t7\" data-start=\"12145\" data-end=\"12196\"\u003eThe digital output controlling the driver circuit\u003c\/li\u003e\n\u003cli data-section-id=\"15t63bw\" data-start=\"12197\" data-end=\"12246\"\u003eThe buzzer responding to the selected threshold\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"12248\" data-end=\"12360\"\u003eThe onboard potentiometer allows the response point to be adjusted carefully under adult or teacher supervision.\u003c\/p\u003e\n\u003cp data-start=\"12362\" data-end=\"12387\"\u003eStudents can investigate:\u003c\/p\u003e\n\u003cul data-start=\"12389\" data-end=\"12682\"\u003e\n\u003cli data-section-id=\"gthrza\" data-start=\"12389\" data-end=\"12432\"\u003eAt what condition does the output change?\u003c\/li\u003e\n\u003cli data-section-id=\"1mf1p7i\" data-start=\"12433\" data-end=\"12476\"\u003eHow does the threshold affect the buzzer?\u003c\/li\u003e\n\u003cli data-section-id=\"ai8vj0\" data-start=\"12477\" data-end=\"12537\"\u003eWhy do different soil samples produce different responses?\u003c\/li\u003e\n\u003cli data-section-id=\"7u1hmw\" data-start=\"12538\" data-end=\"12578\"\u003eDoes probe depth influence the result?\u003c\/li\u003e\n\u003cli data-section-id=\"17auqc9\" data-start=\"12579\" data-end=\"12635\"\u003eDoes unevenly distributed moisture affect the reading?\u003c\/li\u003e\n\u003cli data-section-id=\"1pfdkab\" data-start=\"12636\" data-end=\"12682\"\u003eHow can the model be reset and tested again?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-section-id=\"jlmo5v\" data-start=\"12689\" data-end=\"12725\"\u003eExplore BC547 Transistor Switching\u003c\/h1\u003e\n\u003ch2 data-section-id=\"13m0lu4\" data-start=\"12727\" data-end=\"12777\"\u003eTurn a control signal into an audible response.\u003c\/h2\u003e\n\u003cp data-start=\"12779\" data-end=\"12898\"\u003eThe model includes a custom general-purpose driver board fitted with a \u003cstrong data-start=\"12850\" data-end=\"12874\"\u003eBC547 NPN transistor\u003c\/strong\u003e and a 5V active buzzer.\u003c\/p\u003e\n\u003cp data-start=\"12900\" data-end=\"12997\"\u003eThe transistor acts as an electronic switch between the comparator output and the buzzer circuit.\u003c\/p\u003e\n\u003cp data-start=\"12999\" data-end=\"13031\"\u003eIn the configured demonstration:\u003c\/p\u003e\n\u003col data-start=\"13033\" data-end=\"13285\"\u003e\n\u003cli data-section-id=\"zy3dn1\" data-start=\"13033\" data-end=\"13077\"\u003eThe probe responds to the soil condition.\u003c\/li\u003e\n\u003cli data-section-id=\"16n873a\" data-start=\"13078\" data-end=\"13120\"\u003eThe comparator evaluates that response.\u003c\/li\u003e\n\u003cli data-section-id=\"1ilyqoe\" data-start=\"13121\" data-end=\"13186\"\u003eThe comparator sends its digital output to the driver circuit.\u003c\/li\u003e\n\u003cli data-section-id=\"1k2rh48\" data-start=\"13187\" data-end=\"13239\"\u003eThe BC547 transistor changes its switching state.\u003c\/li\u003e\n\u003cli data-section-id=\"116t1qt\" data-start=\"13240\" data-end=\"13285\"\u003eThe buzzer is activated or remains silent.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"13287\" data-end=\"13308\"\u003eStudents can explore:\u003c\/p\u003e\n\u003cul data-start=\"13310\" data-end=\"13621\"\u003e\n\u003cli data-section-id=\"py529u\" data-start=\"13310\" data-end=\"13327\"\u003eNPN transistors\u003c\/li\u003e\n\u003cli data-section-id=\"12gl320\" data-start=\"13328\" data-end=\"13350\"\u003eElectronic switching\u003c\/li\u003e\n\u003cli data-section-id=\"vgh6c8\" data-start=\"13351\" data-end=\"13390\"\u003eBase, collector and emitter terminals\u003c\/li\u003e\n\u003cli data-section-id=\"11bcsuz\" data-start=\"13391\" data-end=\"13422\"\u003eCut-off and saturation states\u003c\/li\u003e\n\u003cli data-section-id=\"13unzqm\" data-start=\"13423\" data-end=\"13458\"\u003eSignal-controlled output circuits\u003c\/li\u003e\n\u003cli data-section-id=\"7j5oe5\" data-start=\"13459\" data-end=\"13482\"\u003eSolid-state switching\u003c\/li\u003e\n\u003cli data-section-id=\"1e5hjna\" data-start=\"13483\" data-end=\"13517\"\u003eInput, control and output stages\u003c\/li\u003e\n\u003cli data-section-id=\"1cb5uhx\" data-start=\"13518\" data-end=\"13561\"\u003eHow one electronic stage controls another\u003c\/li\u003e\n\u003cli data-section-id=\"16zzlv8\" data-start=\"13562\" data-end=\"13621\"\u003eHow circuits respond automatically to changing conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-section-id=\"16vl6my\" data-start=\"13628\" data-end=\"13654\"\u003eCompare Dry and Wet Soil\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1u54mg9\" data-start=\"13656\" data-end=\"13712\"\u003eTwo contrasting samples create a clear demonstration.\u003c\/h2\u003e\n\u003cp data-start=\"13714\" data-end=\"13803\"\u003eThe kit includes two empty testing containers that students can prepare for the activity.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1s8a9lk\" data-start=\"13805\" data-end=\"13831\"\u003eDry-Soil Demonstration\u003c\/h3\u003e\n\u003cp data-start=\"13833\" data-end=\"13911\"\u003eFill one container with sufficiently dry soil, dry earth or suitable dry sand.\u003c\/p\u003e\n\u003cp data-start=\"13913\" data-end=\"13964\"\u003eInsert the cleaned and dried probe into the sample.\u003c\/p\u003e\n\u003cp data-start=\"13966\" data-end=\"14091\"\u003eThe higher-resistance condition changes the comparator output and activates the model’s transistor-controlled buzzer circuit.\u003c\/p\u003e\n\u003cp data-start=\"14093\" data-end=\"14170\"\u003eThe audible alert represents a dry-soil or watering-required warning concept.\u003c\/p\u003e\n\u003ch3 data-section-id=\"f5aqoh\" data-start=\"14172\" data-end=\"14198\"\u003eWet-Soil Demonstration\u003c\/h3\u003e\n\u003cp data-start=\"14200\" data-end=\"14251\"\u003ePrepare the second container with evenly damp soil.\u003c\/p\u003e\n\u003cp data-start=\"14253\" data-end=\"14346\"\u003eRemove the probe from the dry sample, clean it if required and insert it into the wet sample.\u003c\/p\u003e\n\u003cp data-start=\"14348\" data-end=\"14550\"\u003eThe increased moisture changes the conductive path between the probe tracks. The comparator and transistor circuit respond accordingly, keeping the buzzer silent in the model’s configured demonstration.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1iqce5r\" data-start=\"14552\" data-end=\"14572\"\u003eReset and Repeat\u003c\/h3\u003e\n\u003cp data-start=\"14574\" data-end=\"14632\"\u003eRemove the probe, wipe it clean and repeat the comparison.\u003c\/p\u003e\n\u003cp data-start=\"14634\" data-end=\"14761\"\u003eThe two-container format allows students to move between contrasting conditions and observe how the system responds and resets.\u003c\/p\u003e\n\u003ch1 data-section-id=\"kzdfrs\" data-start=\"14768\" data-end=\"14811\"\u003eUnderstand the Complete Functional System\u003c\/h1\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"14813\" data-end=\"15569\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"14813\" data-end=\"14852\"\u003e\n\u003ctr data-start=\"14813\" data-end=\"14852\"\u003e\n\u003cth data-start=\"14813\" data-end=\"14828\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSystem stage\u003c\/th\u003e\n\u003cth data-start=\"14828\" data-end=\"14840\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eComponent\u003c\/th\u003e\n\u003cth data-start=\"14840\" data-end=\"14852\" data-col-size=\"md\" class=\"last:pe-10\"\u003eFunction\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"14867\" data-end=\"15569\"\u003e\n\u003ctr data-start=\"14867\" data-end=\"14962\"\u003e\n\u003ctd data-start=\"14867\" data-end=\"14879\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"14869\" data-end=\"14878\"\u003eInput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"14879\" data-end=\"14901\"\u003eSoil-moisture probe\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"14901\" data-end=\"14962\"\u003eResponds to the electrical condition of the prepared soil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"14963\" data-end=\"15060\"\u003e\n\u003ctd data-start=\"14963\" data-end=\"14980\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"14965\" data-end=\"14979\"\u003eComparison\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"14980\" data-end=\"15000\"\u003eComparator module\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"15000\" data-end=\"15060\"\u003eCompares the probe response with an adjustable threshold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"15061\" data-end=\"15146\"\u003e\n\u003ctd data-start=\"15061\" data-end=\"15074\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"15063\" data-end=\"15073\"\u003eSignal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"15074\" data-end=\"15091\"\u003eDigital output\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"15091\" data-end=\"15146\"\u003eCarries the result to the transistor driver circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"15147\" data-end=\"15228\"\u003e\n\u003ctd data-start=\"15147\" data-end=\"15163\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"15149\" data-end=\"15162\"\u003eSwitching\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"15163\" data-end=\"15182\"\u003eBC547 transistor\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"15182\" data-end=\"15228\"\u003eControls the buzzer circuit electronically\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"15229\" data-end=\"15298\"\u003e\n\u003ctd data-start=\"15229\" data-end=\"15242\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"15231\" data-end=\"15241\"\u003eOutput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"15242\" data-end=\"15258\"\u003eActive buzzer\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"15258\" data-end=\"15298\"\u003eProduces an audible dry-soil warning\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"15299\" data-end=\"15376\"\u003e\n\u003ctd data-start=\"15299\" data-end=\"15311\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"15301\" data-end=\"15310\"\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"15311\" data-end=\"15324\" data-col-size=\"sm\"\u003e9V battery\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"15324\" data-end=\"15376\"\u003eSupplies electrical energy for the demonstration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"15377\" data-end=\"15469\"\u003e\n\u003ctd data-start=\"15377\" data-end=\"15399\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"15379\" data-end=\"15398\"\u003eTest conditions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"15399\" data-end=\"15422\"\u003eTwo empty containers\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"15422\" data-end=\"15469\"\u003eHold user-prepared dry and wet soil samples\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"15470\" data-end=\"15569\"\u003e\n\u003ctd data-start=\"15470\" data-end=\"15493\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"15472\" data-end=\"15492\"\u003eLearning support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"15493\" data-end=\"15512\"\u003eManual and video\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"15512\" data-end=\"15569\"\u003eGuide setup, testing, explanation and troubleshooting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr data-start=\"15571\" data-end=\"15574\"\u003e\n\u003ch1 data-section-id=\"1qd7y5i\" data-start=\"15576\" data-end=\"15625\"\u003eA Smart-Farming Context Students Can Understand\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1wwt4mq\" data-start=\"15627\" data-end=\"15694\"\u003eConnect soil science with electronics and responsible water use.\u003c\/h2\u003e\n\u003cp data-start=\"15696\" data-end=\"15805\"\u003eThe agricultural layout and testing containers provide a clear application context for the electronic system.\u003c\/p\u003e\n\u003cp data-start=\"15807\" data-end=\"15870\"\u003eEach element represents a stage within a smart-farming concept:\u003c\/p\u003e\n\u003cul data-start=\"15872\" data-end=\"16247\"\u003e\n\u003cli data-section-id=\"cff3xn\" data-start=\"15872\" data-end=\"15940\"\u003eThe \u003cstrong data-start=\"15878\" data-end=\"15903\"\u003eprepared soil samples\u003c\/strong\u003e represent changing field conditions.\u003c\/li\u003e\n\u003cli data-section-id=\"1b44csc\" data-start=\"15941\" data-end=\"15975\"\u003eThe \u003cstrong data-start=\"15947\" data-end=\"15956\"\u003eprobe\u003c\/strong\u003e observes the soil.\u003c\/li\u003e\n\u003cli data-section-id=\"ofxb7h\" data-start=\"15976\" data-end=\"16027\"\u003eThe \u003cstrong data-start=\"15982\" data-end=\"16003\"\u003ecomparator module\u003c\/strong\u003e evaluates the response.\u003c\/li\u003e\n\u003cli data-section-id=\"16x9h3n\" data-start=\"16028\" data-end=\"16085\"\u003eThe \u003cstrong data-start=\"16034\" data-end=\"16054\"\u003eBC547 transistor\u003c\/strong\u003e performs electronic switching.\u003c\/li\u003e\n\u003cli data-section-id=\"pux2o\" data-start=\"16086\" data-end=\"16139\"\u003eThe \u003cstrong data-start=\"16092\" data-end=\"16102\"\u003ebuzzer\u003c\/strong\u003e communicates the dry-soil condition.\u003c\/li\u003e\n\u003cli data-section-id=\"tqqd5u\" data-start=\"16140\" data-end=\"16183\"\u003eThe \u003cstrong data-start=\"16146\" data-end=\"16157\"\u003ebattery\u003c\/strong\u003e powers the demonstration.\u003c\/li\u003e\n\u003cli data-section-id=\"xn02p6\" data-start=\"16184\" data-end=\"16247\"\u003eThe \u003cstrong data-start=\"16190\" data-end=\"16210\"\u003emanual and video\u003c\/strong\u003e guide the complete learning process.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"16249\" data-end=\"16284\"\u003eThe project helps students connect:\u003c\/p\u003e\n\u003cul data-start=\"16286\" data-end=\"16496\"\u003e\n\u003cli data-section-id=\"pb2soy\" data-start=\"16286\" data-end=\"16302\"\u003eSoil condition\u003c\/li\u003e\n\u003cli data-section-id=\"1vac02e\" data-start=\"16303\" data-end=\"16329\"\u003ePlant water requirements\u003c\/li\u003e\n\u003cli data-section-id=\"1u8gvzi\" data-start=\"16330\" data-end=\"16355\"\u003eSensor-based monitoring\u003c\/li\u003e\n\u003cli data-section-id=\"160z1pi\" data-start=\"16356\" data-end=\"16378\"\u003eThreshold comparison\u003c\/li\u003e\n\u003cli data-section-id=\"12gl320\" data-start=\"16379\" data-end=\"16401\"\u003eElectronic switching\u003c\/li\u003e\n\u003cli data-section-id=\"iffeh3\" data-start=\"16402\" data-end=\"16418\"\u003eAudible alerts\u003c\/li\u003e\n\u003cli data-section-id=\"nxvz11\" data-start=\"16419\" data-end=\"16446\"\u003eSmart-irrigation concepts\u003c\/li\u003e\n\u003cli data-section-id=\"1t57twa\" data-start=\"16447\" data-end=\"16470\"\u003eResponsible water use\u003c\/li\u003e\n\u003cli data-section-id=\"69st0u\" data-start=\"16471\" data-end=\"16496\"\u003eAgricultural automation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"16498\" data-end=\"16643\"\u003eThe model is an educational representation of these concepts. It is not a calibrated agricultural instrument or commercial irrigation controller.\u003c\/p\u003e\n\u003ch1 data-section-id=\"z0ux1z\" data-start=\"16650\" data-end=\"16676\"\u003eTest. Observe. Discover.\u003c\/h1\u003e\n\u003ch2 data-section-id=\"j670rs\" data-start=\"16678\" data-end=\"16708\"\u003eDry and Wet Comparison Test\u003c\/h2\u003e\n\u003cp data-start=\"16710\" data-end=\"16752\"\u003ePrepare one dry sample and one wet sample.\u003c\/p\u003e\n\u003cp data-start=\"16754\" data-end=\"16812\"\u003ePlace the probe in each condition and record the response.\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"16814\" data-end=\"17004\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"16814\" data-end=\"16882\"\u003e\n\u003ctr data-start=\"16814\" data-end=\"16882\"\u003e\n\u003cth data-start=\"16814\" data-end=\"16821\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eTest\u003c\/th\u003e\n\u003cth data-start=\"16821\" data-end=\"16842\" data-col-size=\"sm\" class=\"last:pe-10\"\u003ePrepared condition\u003c\/th\u003e\n\u003cth data-start=\"16842\" data-end=\"16863\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eIndicator response\u003c\/th\u003e\n\u003cth data-start=\"16863\" data-end=\"16882\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eBuzzer response\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"16901\" data-end=\"17004\"\u003e\n\u003ctr data-start=\"16901\" data-end=\"16923\"\u003e\n\u003ctd data-start=\"16901\" data-end=\"16905\" data-col-size=\"sm\"\u003e1\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"16905\" data-end=\"16916\"\u003eWet soil\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"16916\" data-end=\"16919\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"16919\" data-end=\"16923\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"16924\" data-end=\"16946\"\u003e\n\u003ctd data-start=\"16924\" data-end=\"16928\" data-col-size=\"sm\"\u003e2\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"16928\" data-end=\"16939\"\u003eDry soil\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"16939\" data-end=\"16942\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"16942\" data-end=\"16946\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"16947\" data-end=\"16975\"\u003e\n\u003ctd data-start=\"16947\" data-end=\"16951\" data-col-size=\"sm\"\u003e3\u003c\/td\u003e\n\u003ctd data-start=\"16951\" data-end=\"16968\" data-col-size=\"sm\"\u003eWet soil again\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"16968\" data-end=\"16971\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"16971\" data-end=\"16975\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"16976\" data-end=\"17004\"\u003e\n\u003ctd data-start=\"16976\" data-end=\"16980\" data-col-size=\"sm\"\u003e4\u003c\/td\u003e\n\u003ctd data-start=\"16980\" data-end=\"16997\" data-col-size=\"sm\"\u003eDry soil again\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"16997\" data-end=\"17000\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"17000\" data-end=\"17004\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 data-section-id=\"ehikfq\" data-start=\"17006\" data-end=\"17029\"\u003eMoisture-Change Test\u003c\/h2\u003e\n\u003cp data-start=\"17031\" data-end=\"17110\"\u003eBegin with a relatively dry sample and add small, measured quantities of water.\u003c\/p\u003e\n\u003cp data-start=\"17112\" data-end=\"17132\"\u003eAfter each addition:\u003c\/p\u003e\n\u003col data-start=\"17134\" data-end=\"17313\"\u003e\n\u003cli data-section-id=\"7jt2it\" data-start=\"17134\" data-end=\"17157\"\u003eMix the soil evenly.\u003c\/li\u003e\n\u003cli data-section-id=\"1kve6yr\" data-start=\"17158\" data-end=\"17210\"\u003eInsert the probe to approximately the same depth.\u003c\/li\u003e\n\u003cli data-section-id=\"nqr7f2\" data-start=\"17211\" data-end=\"17243\"\u003eObserve the module indicator.\u003c\/li\u003e\n\u003cli data-section-id=\"17n4vu\" data-start=\"17244\" data-end=\"17269\"\u003eListen for the buzzer.\u003c\/li\u003e\n\u003cli data-section-id=\"139h7fp\" data-start=\"17270\" data-end=\"17313\"\u003eRecord whether the system changed state.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 data-section-id=\"1sam77x\" data-start=\"17315\" data-end=\"17341\"\u003eProbe-Depth Observation\u003c\/h2\u003e\n\u003cp data-start=\"17343\" data-end=\"17410\"\u003eInsert the probe to different controlled depths in the same sample.\u003c\/p\u003e\n\u003cp data-start=\"17412\" data-end=\"17468\"\u003eObserve whether probe placement influences the response.\u003c\/p\u003e\n\u003ch2 data-section-id=\"qys3um\" data-start=\"17470\" data-end=\"17491\"\u003eSoil-Position Test\u003c\/h2\u003e\n\u003cp data-start=\"17493\" data-end=\"17544\"\u003eTest different positions within the same container.\u003c\/p\u003e\n\u003cp data-start=\"17546\" data-end=\"17624\"\u003eThis can help students understand that moisture may not be distributed evenly.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1sczom\" data-start=\"17626\" data-end=\"17647\"\u003eRepeatability Test\u003c\/h2\u003e\n\u003cp data-start=\"17649\" data-end=\"17711\"\u003eReturn the probe to the same prepared condition several times.\u003c\/p\u003e\n\u003cp data-start=\"17713\" data-end=\"17769\"\u003eRecord whether the model produces a consistent response.\u003c\/p\u003e\n\u003ch2 data-section-id=\"25ttwz\" data-start=\"17771\" data-end=\"17795\"\u003eThreshold Exploration\u003c\/h2\u003e\n\u003cp data-start=\"17797\" data-end=\"17889\"\u003eUnder adult or teacher supervision, make a small adjustment to the comparator potentiometer.\u003c\/p\u003e\n\u003cp data-start=\"17891\" data-end=\"17951\"\u003eRepeat the tests and observe how the response point changes.\u003c\/p\u003e\n\u003cp data-start=\"17953\" data-end=\"18049\"\u003eOnly small adjustments should be made, and the original position should be noted before testing.\u003c\/p\u003e\n\u003ch1 data-section-id=\"grc2aq\" data-start=\"18056\" data-end=\"18082\"\u003eLearn Through Every Test\u003c\/h1\u003e\n\u003ch3 data-section-id=\"y9l8or\" data-start=\"18084\" data-end=\"18095\"\u003ePredict\u003c\/h3\u003e\n\u003cp data-start=\"18097\" data-end=\"18142\"\u003eWill the buzzer sound in the selected sample?\u003c\/p\u003e\n\u003ch3 data-section-id=\"74yqa7\" data-start=\"18144\" data-end=\"18153\"\u003eWatch\u003c\/h3\u003e\n\u003cp data-start=\"18155\" data-end=\"18203\"\u003eReview the video demonstration before beginning.\u003c\/p\u003e\n\u003ch3 data-section-id=\"ynqv2o\" data-start=\"18205\" data-end=\"18213\"\u003eTest\u003c\/h3\u003e\n\u003cp data-start=\"18215\" data-end=\"18260\"\u003eInsert the probe into the prepared condition.\u003c\/p\u003e\n\u003ch3 data-section-id=\"sizzw\" data-start=\"18262\" data-end=\"18273\"\u003eObserve\u003c\/h3\u003e\n\u003cp data-start=\"18275\" data-end=\"18327\"\u003eWatch the module indicator and listen to the buzzer.\u003c\/p\u003e\n\u003ch3 data-section-id=\"pjpz2j\" data-start=\"18329\" data-end=\"18339\"\u003eRecord\u003c\/h3\u003e\n\u003cp data-start=\"18341\" data-end=\"18417\"\u003eDocument the sample condition, probe position, threshold setting and result.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1ob2s0x\" data-start=\"18419\" data-end=\"18430\"\u003eCompare\u003c\/h3\u003e\n\u003cp data-start=\"18432\" data-end=\"18465\"\u003eMove between dry and wet samples.\u003c\/p\u003e\n\u003ch3 data-section-id=\"14mypyj\" data-start=\"18467\" data-end=\"18478\"\u003eAnalyse\u003c\/h3\u003e\n\u003cp data-start=\"18480\" data-end=\"18533\"\u003eIdentify why the output changed or remained the same.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1bn6r32\" data-start=\"18535\" data-end=\"18551\"\u003eTroubleshoot\u003c\/h3\u003e\n\u003cp data-start=\"18553\" data-end=\"18650\"\u003eCheck the battery, soil preparation, probe cleanliness, wire connections and sensitivity setting.\u003c\/p\u003e\n\u003ch3 data-section-id=\"16njeap\" data-start=\"18652\" data-end=\"18663\"\u003eExplain\u003c\/h3\u003e\n\u003cp data-start=\"18665\" data-end=\"18748\"\u003eDescribe how the probe, comparator, transistor and buzzer form one complete system.\u003c\/p\u003e\n\u003ch3 data-section-id=\"gd19q8\" data-start=\"18750\" data-end=\"18760\"\u003eExtend\u003c\/h3\u003e\n\u003cp data-start=\"18762\" data-end=\"18855\"\u003eDevelop additional questions about irrigation, sensor technology and agricultural automation.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1hhrn0b\" data-start=\"18862\" data-end=\"18884\"\u003eExplore Key Concepts\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1q47602\" data-start=\"18886\" data-end=\"18903\"\u003eSoil and Water\u003c\/h2\u003e\n\u003cul data-start=\"18905\" data-end=\"19036\"\u003e\n\u003cli data-section-id=\"cfgf1b\" data-start=\"18905\" data-end=\"18920\"\u003eSoil moisture\u003c\/li\u003e\n\u003cli data-section-id=\"1y43shf\" data-start=\"18921\" data-end=\"18939\"\u003eDry and wet soil\u003c\/li\u003e\n\u003cli data-section-id=\"1hq99j\" data-start=\"18940\" data-end=\"18960\"\u003eWater distribution\u003c\/li\u003e\n\u003cli data-section-id=\"uyw83y\" data-start=\"18961\" data-end=\"18980\"\u003eSoil conductivity\u003c\/li\u003e\n\u003cli data-section-id=\"k6pdxl\" data-start=\"18981\" data-end=\"19012\"\u003eMoisture-dependent resistance\u003c\/li\u003e\n\u003cli data-section-id=\"1t57twa\" data-start=\"19013\" data-end=\"19036\"\u003eResponsible water use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1ec13w5\" data-start=\"19038\" data-end=\"19058\"\u003eSensor Technology\u003c\/h2\u003e\n\u003cul data-start=\"19060\" data-end=\"19192\"\u003e\n\u003cli data-section-id=\"13tgcyz\" data-start=\"19060\" data-end=\"19082\"\u003eSoil-moisture probes\u003c\/li\u003e\n\u003cli data-section-id=\"2rubkr\" data-start=\"19083\" data-end=\"19098\"\u003eSensor inputs\u003c\/li\u003e\n\u003cli data-section-id=\"102bvg0\" data-start=\"19099\" data-end=\"19120\"\u003eThreshold detection\u003c\/li\u003e\n\u003cli data-section-id=\"yv2u8b\" data-start=\"19121\" data-end=\"19141\"\u003eComparator modules\u003c\/li\u003e\n\u003cli data-section-id=\"p42fua\" data-start=\"19142\" data-end=\"19166\"\u003eAdjustable sensitivity\u003c\/li\u003e\n\u003cli data-section-id=\"1p4i5vy\" data-start=\"19167\" data-end=\"19192\"\u003eDigital output response\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1jf5fit\" data-start=\"19194\" data-end=\"19217\"\u003eElectronic Switching\u003c\/h2\u003e\n\u003cul data-start=\"19219\" data-end=\"19365\"\u003e\n\u003cli data-section-id=\"1ykeubq\" data-start=\"19219\" data-end=\"19241\"\u003eBC547 NPN transistor\u003c\/li\u003e\n\u003cli data-section-id=\"1pra1qn\" data-start=\"19242\" data-end=\"19271\"\u003eBase, collector and emitter\u003c\/li\u003e\n\u003cli data-section-id=\"kmpven\" data-start=\"19272\" data-end=\"19296\"\u003eCut-off and saturation\u003c\/li\u003e\n\u003cli data-section-id=\"7j5oe5\" data-start=\"19297\" data-end=\"19320\"\u003eSolid-state switching\u003c\/li\u003e\n\u003cli data-section-id=\"1e16dpr\" data-start=\"19321\" data-end=\"19337\"\u003eBuzzer control\u003c\/li\u003e\n\u003cli data-section-id=\"1g0srvu\" data-start=\"19338\" data-end=\"19365\"\u003eInput and output circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1umaqkk\" data-start=\"19367\" data-end=\"19383\"\u003eSmart Farming\u003c\/h2\u003e\n\u003cul data-start=\"19385\" data-end=\"19545\"\u003e\n\u003cli data-section-id=\"zhtp37\" data-start=\"19385\" data-end=\"19412\"\u003eSoil-condition monitoring\u003c\/li\u003e\n\u003cli data-section-id=\"ke8one\" data-start=\"19413\" data-end=\"19440\"\u003eDry-soil warning concepts\u003c\/li\u003e\n\u003cli data-section-id=\"zn4b9p\" data-start=\"19441\" data-end=\"19470\"\u003eIrrigation decision support\u003c\/li\u003e\n\u003cli data-section-id=\"69st0u\" data-start=\"19471\" data-end=\"19496\"\u003eAgricultural automation\u003c\/li\u003e\n\u003cli data-section-id=\"kobsnu\" data-start=\"19497\" data-end=\"19522\"\u003eResource-aware watering\u003c\/li\u003e\n\u003cli data-section-id=\"nhx3cq\" data-start=\"19523\" data-end=\"19545\"\u003eSensor-based farming\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"bhz16e\" data-start=\"19547\" data-end=\"19573\"\u003ePractical Investigation\u003c\/h2\u003e\n\u003cul data-start=\"19575\" data-end=\"19692\"\u003e\n\u003cli data-section-id=\"lvdpv8\" data-start=\"19575\" data-end=\"19595\"\u003eControlled testing\u003c\/li\u003e\n\u003cli data-section-id=\"1at15ml\" data-start=\"19596\" data-end=\"19611\"\u003eRepeatability\u003c\/li\u003e\n\u003cli data-section-id=\"a5q2ep\" data-start=\"19612\" data-end=\"19624\"\u003eComparison\u003c\/li\u003e\n\u003cli data-section-id=\"emq8pz\" data-start=\"19625\" data-end=\"19645\"\u003eObservation tables\u003c\/li\u003e\n\u003cli data-section-id=\"z1z1u8\" data-start=\"19646\" data-end=\"19663\"\u003eTroubleshooting\u003c\/li\u003e\n\u003cli data-section-id=\"sggcpd\" data-start=\"19664\" data-end=\"19692\"\u003eCause-and-effect reasoning\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-section-id=\"1hdonrc\" data-start=\"19699\" data-end=\"19734\"\u003eBuilt for Confident Demonstration\u003c\/h1\u003e\n\u003cp data-start=\"19736\" data-end=\"19847\"\u003eThe clear wet-versus-dry comparison, audible response and guided learning material make the model suitable for:\u003c\/p\u003e\n\u003cul data-start=\"19849\" data-end=\"20273\"\u003e\n\u003cli data-section-id=\"cas5ce\" data-start=\"19849\" data-end=\"19874\"\u003eSchool science projects\u003c\/li\u003e\n\u003cli data-section-id=\"kiq2zo\" data-start=\"19875\" data-end=\"19896\"\u003eScience exhibitions\u003c\/li\u003e\n\u003cli data-section-id=\"1e0u4lr\" data-start=\"19897\" data-end=\"19923\"\u003eClassroom demonstrations\u003c\/li\u003e\n\u003cli data-section-id=\"kkwfgh\" data-start=\"19924\" data-end=\"19953\"\u003eSmart-farming presentations\u003c\/li\u003e\n\u003cli data-section-id=\"u46i5f\" data-start=\"19954\" data-end=\"19979\"\u003eSoil-science activities\u003c\/li\u003e\n\u003cli data-section-id=\"14gkifv\" data-start=\"19980\" data-end=\"20009\"\u003eWater-conservation projects\u003c\/li\u003e\n\u003cli data-section-id=\"jrudvs\" data-start=\"20010\" data-end=\"20033\"\u003eSensor demonstrations\u003c\/li\u003e\n\u003cli data-section-id=\"19vnjrc\" data-start=\"20034\" data-end=\"20071\"\u003eTransistor-switching demonstrations\u003c\/li\u003e\n\u003cli data-section-id=\"1r8cg9r\" data-start=\"20072\" data-end=\"20108\"\u003eElectrical-conductivity activities\u003c\/li\u003e\n\u003cli data-section-id=\"2o0ax5\" data-start=\"20109\" data-end=\"20146\"\u003eAgricultural-technology discussions\u003c\/li\u003e\n\u003cli data-section-id=\"1v9xwk3\" data-start=\"20147\" data-end=\"20162\"\u003eSTEM learning\u003c\/li\u003e\n\u003cli data-section-id=\"1nl6elw\" data-start=\"20163\" data-end=\"20186\"\u003eExperiential learning\u003c\/li\u003e\n\u003cli data-section-id=\"1o2e6vp\" data-start=\"20187\" data-end=\"20211\"\u003eProject-based learning\u003c\/li\u003e\n\u003cli data-section-id=\"4tplyf\" data-start=\"20212\" data-end=\"20240\"\u003eProject-report preparation\u003c\/li\u003e\n\u003cli data-section-id=\"15rfreh\" data-start=\"20241\" data-end=\"20259\"\u003eViva preparation\u003c\/li\u003e\n\u003cli data-section-id=\"11hgo15\" data-start=\"20260\" data-end=\"20273\"\u003eGrades 7–12\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-section-id=\"14d3cd5\" data-start=\"20280\" data-end=\"20311\"\u003eSuggested Student Explanation\u003c\/h1\u003e\n\u003cblockquote data-start=\"20313\" data-end=\"20904\"\u003e\n\u003cp data-start=\"20315\" data-end=\"20904\"\u003e“This is a smart soil-moisture detection working model. The probe checks the electrical condition of the prepared soil sample and sends its response to the comparator module. The comparator compares this response with an adjustable threshold. Its digital output controls a BC547 transistor, which acts as an electronic switch for the buzzer. In this model, dry soil activates the warning buzzer, while sufficiently wet soil keeps the alarm off. The project demonstrates soil-moisture sensing, electrical conductivity, threshold comparison, transistor switching and smart-farming concepts.”\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch1 data-section-id=\"kts086\" data-start=\"20911\" data-end=\"20938\"\u003eBuild Upon the Foundation\u003c\/h1\u003e\n\u003cp data-start=\"20940\" data-end=\"21046\"\u003eOnce students understand the original sensing and alert sequence, the model can inspire further questions:\u003c\/p\u003e\n\u003cul data-start=\"21048\" data-end=\"21564\"\u003e\n\u003cli data-section-id=\"wodnv7\" data-start=\"21048\" data-end=\"21097\"\u003eCould an LED provide a visual dry-soil warning?\u003c\/li\u003e\n\u003cli data-section-id=\"mff2vz\" data-start=\"21098\" data-end=\"21135\"\u003eCould another output be controlled?\u003c\/li\u003e\n\u003cli data-section-id=\"1ope7fj\" data-start=\"21136\" data-end=\"21181\"\u003eCould a relay respond to the sensor signal?\u003c\/li\u003e\n\u003cli data-section-id=\"16l2ly7\" data-start=\"21182\" data-end=\"21223\"\u003eCould a model water pump be introduced?\u003c\/li\u003e\n\u003cli data-section-id=\"eda1iv\" data-start=\"21224\" data-end=\"21270\"\u003eCould a second probe compare another sample?\u003c\/li\u003e\n\u003cli data-section-id=\"1etvha9\" data-start=\"21271\" data-end=\"21310\"\u003eCould different soil types be tested?\u003c\/li\u003e\n\u003cli data-section-id=\"1aomf9j\" data-start=\"21311\" data-end=\"21353\"\u003eCould moisture be displayed numerically?\u003c\/li\u003e\n\u003cli data-section-id=\"1ufcg9j\" data-start=\"21354\" data-end=\"21393\"\u003eCould readings be recorded over time?\u003c\/li\u003e\n\u003cli data-section-id=\"1wtmo30\" data-start=\"21394\" data-end=\"21447\"\u003eCould a microcontroller introduce irrigation logic?\u003c\/li\u003e\n\u003cli data-section-id=\"6cx5nk\" data-start=\"21448\" data-end=\"21507\"\u003eCould underwatering and overwatering both be represented?\u003c\/li\u003e\n\u003cli data-section-id=\"1un6kfm\" data-start=\"21508\" data-end=\"21564\"\u003eCould the concept be expanded into a greenhouse model?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"21566\" data-end=\"21680\"\u003eThese are further learning directions. Additional components, modifications and suitable guidance may be required.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1sdrx7j\" data-start=\"21687\" data-end=\"21729\"\u003eThis Concept Can Also Be Used to Explore\u003c\/h1\u003e\n\u003cul data-start=\"21731\" data-end=\"22226\"\u003e\n\u003cli data-section-id=\"nxvz11\" data-start=\"21731\" data-end=\"21758\"\u003eSmart-irrigation concepts\u003c\/li\u003e\n\u003cli data-section-id=\"wi8hks\" data-start=\"21759\" data-end=\"21793\"\u003eAutomatic plant-watering systems\u003c\/li\u003e\n\u003cli data-section-id=\"c3t4sv\" data-start=\"21794\" data-end=\"21820\"\u003eDry-soil warning systems\u003c\/li\u003e\n\u003cli data-section-id=\"v8l1rn\" data-start=\"21821\" data-end=\"21855\"\u003eAgricultural moisture monitoring\u003c\/li\u003e\n\u003cli data-section-id=\"wjpddn\" data-start=\"21856\" data-end=\"21879\"\u003eGreenhouse monitoring\u003c\/li\u003e\n\u003cli data-section-id=\"4t2a9l\" data-start=\"21880\" data-end=\"21908\"\u003eGarden-watering indicators\u003c\/li\u003e\n\u003cli data-section-id=\"gb8pr3\" data-start=\"21909\" data-end=\"21939\"\u003ePlant overwatering awareness\u003c\/li\u003e\n\u003cli data-section-id=\"3ytcp5\" data-start=\"21940\" data-end=\"21971\"\u003eSoil-conductivity comparisons\u003c\/li\u003e\n\u003cli data-section-id=\"1erat82\" data-start=\"21972\" data-end=\"22005\"\u003eThreshold-based control systems\u003c\/li\u003e\n\u003cli data-section-id=\"1c3y0\" data-start=\"22006\" data-end=\"22037\"\u003eTransistor-switching projects\u003c\/li\u003e\n\u003cli data-section-id=\"ge7di7\" data-start=\"22038\" data-end=\"22068\"\u003eWater-level warning concepts\u003c\/li\u003e\n\u003cli data-section-id=\"civedg\" data-start=\"22069\" data-end=\"22102\"\u003eLiquid-conductivity experiments\u003c\/li\u003e\n\u003cli data-section-id=\"4wimmq\" data-start=\"22103\" data-end=\"22136\"\u003eSensor-controlled pump concepts\u003c\/li\u003e\n\u003cli data-section-id=\"1bt4gvl\" data-start=\"22137\" data-end=\"22169\"\u003ePrecision-agriculture concepts\u003c\/li\u003e\n\u003cli data-section-id=\"1k5z7ks\" data-start=\"22170\" data-end=\"22200\"\u003eInput-process-output systems\u003c\/li\u003e\n\u003cli data-section-id=\"69st0u\" data-start=\"22201\" data-end=\"22226\"\u003eAgricultural automation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"22228\" data-end=\"22366\"\u003eThese are educational concept extensions based on the working principle. They are not additional built-in functions of the supplied model.\u003c\/p\u003e\n\u003cp data-start=\"23522\" data-end=\"23676\"\u003e \u003c\/p\u003e\n\u003ch1 data-section-id=\"158v5je\" data-start=\"24622\" data-end=\"24651\"\u003eA Complete Learning Journey\u003c\/h1\u003e\n\u003ch2 data-section-id=\"4j6q80\" data-start=\"24653\" data-end=\"24672\"\u003eScan the code.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1ns05dq\" data-start=\"24673\" data-end=\"24702\"\u003eWatch the demonstration.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1sl89mi\" data-start=\"24703\" data-end=\"24724\"\u003eRead the manual.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"8prnty\" data-start=\"24725\" data-end=\"24750\"\u003ePrepare the samples.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1fybfnx\" data-start=\"24751\" data-end=\"24771\"\u003eCheck the soil.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"vkjubq\" data-start=\"24772\" data-end=\"24799\"\u003eCompare the condition.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"peke1p\" data-start=\"24800\" data-end=\"24823\"\u003eFollow the signal.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1nwmmw6\" data-start=\"24824\" data-end=\"24846\"\u003eHear the warning.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"cxp7xy\" data-start=\"24847\" data-end=\"24870\"\u003eRecord the result.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1ixk6pc\" data-start=\"24871\" data-end=\"24895\"\u003eExplain the system.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1e6rqbt\" data-start=\"24896\" data-end=\"24919\"\u003eBuild upon the idea.\u003c\/h2\u003e\n\u003cp data-start=\"24921\" data-end=\"25141\"\u003eThe \u003cstrong data-start=\"24925\" data-end=\"24975\"\u003eGo Science Smart Soil Moisture Detection Model\u003c\/strong\u003e transforms soil condition, conductivity and electronic switching into a guided working experience students can observe, test, understand and confidently demonstrate.\u003c\/p\u003e\n\u003ch1 data-section-id=\"4evk91\" data-start=\"25148\" data-end=\"25193\"\u003eImportant Educational and Usage Information\u003c\/h1\u003e\n\u003cp data-start=\"25195\" data-end=\"25271\"\u003eThis product is an educational demonstration model and science teaching aid.\u003c\/p\u003e\n\u003cul data-start=\"25273\" data-end=\"26296\"\u003e\n\u003cli data-section-id=\"10qu1jp\" data-start=\"25273\" data-end=\"25319\"\u003eAdult or teacher supervision is recommended.\u003c\/li\u003e\n\u003cli data-section-id=\"1hik5aa\" data-start=\"25320\" data-end=\"25356\"\u003eSoil and battery are not included.\u003c\/li\u003e\n\u003cli data-section-id=\"8qmybi\" data-start=\"25357\" data-end=\"25416\"\u003ePrepare soil samples separately before the demonstration.\u003c\/li\u003e\n\u003cli data-section-id=\"12wxji1\" data-start=\"25417\" data-end=\"25481\"\u003eUse only small soil quantities inside the supplied containers.\u003c\/li\u003e\n\u003cli data-section-id=\"1wqddiv\" data-start=\"25482\" data-end=\"25578\"\u003eKeep excess water away from the comparator module, driver board, buzzer and battery terminals.\u003c\/li\u003e\n\u003cli data-section-id=\"1v31brs\" data-start=\"25579\" data-end=\"25638\"\u003eDo not pour water directly over any electronic component.\u003c\/li\u003e\n\u003cli data-section-id=\"1bd50oy\" data-start=\"25639\" data-end=\"25676\"\u003eInsert and remove the probe gently.\u003c\/li\u003e\n\u003cli data-section-id=\"1csd6nz\" data-start=\"25677\" data-end=\"25731\"\u003eWipe the probe clean and dry after wet-soil testing.\u003c\/li\u003e\n\u003cli data-section-id=\"1qrxyv4\" data-start=\"25732\" data-end=\"25780\"\u003eDo not bend, scrape or force the probe tracks.\u003c\/li\u003e\n\u003cli data-section-id=\"1d8ephb\" data-start=\"25781\" data-end=\"25821\"\u003eKeep every buzzer demonstration brief.\u003c\/li\u003e\n\u003cli data-section-id=\"6igmin\" data-start=\"25822\" data-end=\"25883\"\u003eConnect the battery using the correct terminal orientation.\u003c\/li\u003e\n\u003cli data-section-id=\"rpavuh\" data-start=\"25884\" data-end=\"25938\"\u003eDisconnect the battery immediately after every test.\u003c\/li\u003e\n\u003cli data-section-id=\"bupwvs\" data-start=\"25939\" data-end=\"25991\"\u003eDo not store the model with the battery connected.\u003c\/li\u003e\n\u003cli data-section-id=\"jemqog\" data-start=\"25992\" data-end=\"26040\"\u003eEmpty and clean the containers before packing.\u003c\/li\u003e\n\u003cli data-section-id=\"ihqw1l\" data-start=\"26041\" data-end=\"26083\"\u003eStore the model in a cool and dry place.\u003c\/li\u003e\n\u003cli data-section-id=\"2gvr7g\" data-start=\"26084\" data-end=\"26227\"\u003eProduct appearance, wire routing, component placement and assembly details may vary slightly due to manufacturing and component availability.\u003c\/li\u003e\n\u003cli data-section-id=\"1c5xcd5\" data-start=\"26228\" data-end=\"26296\"\u003eInternet access is required to open online manual and video links.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"26298\" data-end=\"26466\"\u003eThis model is not intended for use as a calibrated agricultural instrument, automatic irrigation controller, commercial smart-farming system or water-management device.\u003c\/p\u003e\n\u003cp data-start=\"26298\" data-end=\"26466\"\u003e\u003cstrong data-start=\"28912\" data-end=\"28949\"\u003eReturn, Refund \u0026amp; Exchange Notice:\u003c\/strong\u003e This educational working model contains tested and sensitive electronic components. Kits that have been opened, powered, activated, tested, used, altered or exposed to soil, moisture or water are not eligible for return, refund or exchanged. Battery and soil are not included. Please review the product description, included contents, dimensions, power requirement, demonstration video and usage instructions carefully before purchase.\u003c\/p\u003e","brand":"Go Science","offers":[{"title":"Default Title","offer_id":45647654453295,"sku":"2671814292804","price":649.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/4442\/3471\/files\/Go_Science_Classroom_Series_Smart_Soil_Moisture_Detection_kit_for_School_Project_Demonstration_box_image_front.jpg?v=1784636852"},{"product_id":"gas-alert-alarm-school-project-demonstration-kit","title":"Gas Alert Alarm School Project \u0026 Demonstration kit using MQ135 Sensor Go Science Classroom Series","description":"\u003ch1 data-section-id=\"1mm61kw\" data-start=\"0\" data-end=\"42\" class=\"PDq2pG_selectionAnchorContainer\"\u003eGas Alert Alarm School Project \u0026amp; Demonstration kit Using MQ135 Gas Sensor\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003ch2 data-section-id=\"xwwxex\" data-start=\"43\" data-end=\"102\"\u003ePre-Wired Relay-Based School Project \u0026amp; Demonstration Kit\u003c\/h2\u003e\n\u003ch3 data-section-id=\"vwyq32\" data-start=\"104\" data-end=\"187\"\u003eSee gas sensing, threshold response and automatic alert switching come to life.\u003c\/h3\u003e\n\u003cp data-start=\"189\" data-end=\"320\"\u003eTurn gas-sensor technology, semiconductor behaviour and relay-controlled alert systems into a live, observable learning experience.\u003c\/p\u003e\n\u003cp data-start=\"189\" data-end=\"320\"\u003e\u003ciframe width=\"1012\" height=\"569\" src=\"https:\/\/www.youtube.com\/embed\/ALmAUoj1hAA\" title=\"\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp data-start=\"322\" data-end=\"561\"\u003eThe \u003cstrong data-start=\"326\" data-end=\"373\"\u003eGo Science Classroom Series Gas Alert Alarm\u003c\/strong\u003e brings an MQ135 gas sensor module, adjustable comparator circuit, 5V relay module, active buzzer and reverse-polarity protection diode together on one complete pre-wired working platform.\u003c\/p\u003e\n\u003cp data-start=\"563\" data-end=\"872\"\u003eDuring a carefully supervised demonstration, the MQ135 sensor responds to the presence of suitable gas or vapour near its sensing surface. When the sensor response crosses the selected threshold, its digital output activates the relay. The relay switches the buzzer circuit and produces a clear audible alert.\u003c\/p\u003e\n\u003cp data-start=\"874\" data-end=\"927\"\u003eStudents can follow the complete functional sequence:\u003c\/p\u003e\n\u003cp data-start=\"929\" data-end=\"1007\"\u003e\u003cstrong data-start=\"929\" data-end=\"1007\"\u003eSense the Air → Compare the Response → Trigger the Relay → Sound the Alert\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1009\" data-end=\"1227\"\u003eThe model provides a practical foundation for exploring gas sensing, sensor circuits, adjustable thresholds, semiconductor technology, electromagnetic relay switching, audible alerts and home-safety awareness concepts.\u003c\/p\u003e\n\u003cp data-start=\"1229\" data-end=\"1483\"\u003eDesigned for \u003cstrong data-start=\"1242\" data-end=\"1257\"\u003eGrades 7–12\u003c\/strong\u003e, it is suitable for school projects, science exhibitions, classroom demonstrations, basic electronics learning and sensor-based safety presentations.\u003c\/p\u003e\n\u003ch1 data-section-id=\"cdsp2y\" data-start=\"1490\" data-end=\"1529\"\u003eA Complete Guided Learning Experience\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1ck03rv\" data-start=\"1531\" data-end=\"1606\"\u003eWorking model, illustrated manual and video demonstration—all connected.\u003c\/h2\u003e\n\u003cp data-start=\"1608\" data-end=\"1805\"\u003eEvery Go Science Classroom Series kit is supported by a guided learning experience that helps students understand the concept, prepare the demonstration and confidently explain the complete system.\u003c\/p\u003e\n\u003cp data-start=\"1807\" data-end=\"1835\"\u003eThis kit includes access to:\u003c\/p\u003e\n\u003cul data-start=\"1837\" data-end=\"2132\"\u003e\n\u003cli data-section-id=\"12k1qd3\" data-start=\"1837\" data-end=\"1888\"\u003eA detailed full-colour digital instruction manual\u003c\/li\u003e\n\u003cli data-section-id=\"1qrzs62\" data-start=\"1889\" data-end=\"1925\"\u003eIllustrated component explanations\u003c\/li\u003e\n\u003cli data-section-id=\"1upmqzk\" data-start=\"1926\" data-end=\"1963\"\u003eStep-by-step demonstration guidance\u003c\/li\u003e\n\u003cli data-section-id=\"1vtz6jq\" data-start=\"1964\" data-end=\"1997\"\u003eA dedicated video demonstration\u003c\/li\u003e\n\u003cli data-section-id=\"1p0ig0z\" data-start=\"1998\" data-end=\"2039\"\u003eQR access to digital learning resources\u003c\/li\u003e\n\u003cli data-section-id=\"6lea8i\" data-start=\"2040\" data-end=\"2086\"\u003eSafety, care and troubleshooting information\u003c\/li\u003e\n\u003cli data-section-id=\"i3obxa\" data-start=\"2087\" data-end=\"2132\"\u003eConcept recap and Certificate of Completion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2134\" data-end=\"2192\"\u003eThe learning journey is designed to take students through:\u003c\/p\u003e\n\u003cp data-start=\"2194\" data-end=\"2267\"\u003e\u003cstrong data-start=\"2194\" data-end=\"2267\"\u003eExplore → Understand → Watch → Prepare → Observe → Explain → Complete\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2269\" data-end=\"2497\"\u003eStudents can first study the working principle through the manual, watch the actual model in the demonstration video and then use both resources while preparing for a school project, classroom presentation or science exhibition.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1hjr29d\" data-start=\"21630\" data-end=\"21650\"\u003eWhat’s in the Kit?\u003c\/h1\u003e\n\u003cul data-start=\"21652\" data-end=\"22335\"\u003e\n\u003cli data-section-id=\"11itsvr\" data-start=\"21652\" data-end=\"21677\"\u003eMQ135 gas-sensor module\u003c\/li\u003e\n\u003cli data-section-id=\"u62o12\" data-start=\"21678\" data-end=\"21709\"\u003eAdjustable comparator circuit\u003c\/li\u003e\n\u003cli data-section-id=\"th34t6\" data-start=\"21710\" data-end=\"21735\"\u003e5V relay\/control module\u003c\/li\u003e\n\u003cli data-section-id=\"1i8s15z\" data-start=\"21736\" data-end=\"21754\"\u003e5V active buzzer\u003c\/li\u003e\n\u003cli data-section-id=\"ruatwo\" data-start=\"21755\" data-end=\"21797\"\u003eInline reverse-polarity protection diode\u003c\/li\u003e\n\u003cli data-section-id=\"vj52rd\" data-start=\"21798\" data-end=\"21819\"\u003eHouse display model\u003c\/li\u003e\n\u003cli data-section-id=\"sj4cwh\" data-start=\"21820\" data-end=\"21852\"\u003eWooden component-support stand\u003c\/li\u003e\n\u003cli data-section-id=\"26qhle\" data-start=\"21853\" data-end=\"21887\"\u003eDecorative artificial-grass base\u003c\/li\u003e\n\u003cli data-section-id=\"zjevfo\" data-start=\"21888\" data-end=\"21922\"\u003ePre-wired electrical connections\u003c\/li\u003e\n\u003cli data-section-id=\"myf71m\" data-start=\"21923\" data-end=\"21947\"\u003eBattery snap connector\u003c\/li\u003e\n\u003cli data-section-id=\"19u4i7m\" data-start=\"21948\" data-end=\"21988\"\u003eReady-to-use educational working model\u003c\/li\u003e\n\u003cli data-section-id=\"1a44xy5\" data-start=\"21989\" data-end=\"22031\"\u003eQR access to the detailed digital manual\u003c\/li\u003e\n\u003cli data-section-id=\"1xp8vqn\" data-start=\"22032\" data-end=\"22089\"\u003eDetailed 16-page full-colour digital instruction manual\u003c\/li\u003e\n\u003cli data-section-id=\"1gzewut\" data-start=\"22090\" data-end=\"22145\"\u003eQR access to the video demonstration from the kit box\u003c\/li\u003e\n\u003cli data-section-id=\"18cz6pz\" data-start=\"22146\" data-end=\"22180\"\u003eStep-by-step video demonstration\u003c\/li\u003e\n\u003cli data-section-id=\"1qrzs62\" data-start=\"22181\" data-end=\"22217\"\u003eIllustrated component explanations\u003c\/li\u003e\n\u003cli data-section-id=\"1u1ht8k\" data-start=\"22218\" data-end=\"22246\"\u003eWorking-principle guidance\u003c\/li\u003e\n\u003cli data-section-id=\"17et7td\" data-start=\"22247\" data-end=\"22289\"\u003eSafety, care and troubleshooting support\u003c\/li\u003e\n\u003cli data-section-id=\"i3obxa\" data-start=\"22290\" data-end=\"22335\"\u003eConcept recap and Certificate of Completion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"22337\" data-end=\"22340\"\u003e\n\u003ch1 data-section-id=\"1rc8kfz\" data-start=\"22342\" data-end=\"22363\"\u003eRequired Separately\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1kc5asn\" data-start=\"22365\" data-end=\"22378\"\u003e9V Battery\u003c\/h2\u003e\n\u003cp data-start=\"22380\" data-end=\"22420\"\u003eThe model requires one fresh 9V battery.\u003c\/p\u003e\n\u003cp data-start=\"22422\" data-end=\"22450\"\u003e\u003cstrong data-start=\"22422\" data-end=\"22450\"\u003eBattery is not included.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 data-section-id=\"4v6ju9\" data-start=\"22452\" data-end=\"22486\"\u003eSupervised Demonstration Source\u003c\/h2\u003e\n\u003cp data-start=\"22488\" data-end=\"22614\"\u003eThe supervised demonstration shown in the supplied manual and video uses a small, brief release from an \u003cstrong data-start=\"22592\" data-end=\"22613\"\u003eunlit gas lighter\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"22616\" data-end=\"22648\"\u003e\u003cstrong data-start=\"22616\" data-end=\"22648\"\u003eGas lighter is not included.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"22650\" data-end=\"22894\"\u003eOnly an adult or teacher may conduct this part of the activity. The lighter must never be ignited, and the demonstration must take place in a well-ventilated environment completely free from flames, sparks, hot surfaces and flammable materials.\u003c\/p\u003e\n\u003ch1 data-section-id=\"nh62sj\" data-start=\"22901\" data-end=\"22925\"\u003eProduct Specifications\u003c\/h1\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"22927\" data-end=\"23763\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"22927\" data-end=\"22954\"\u003e\n\u003ctr data-start=\"22927\" data-end=\"22954\"\u003e\n\u003cth data-start=\"22927\" data-end=\"22943\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"22943\" data-end=\"22954\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"22965\" data-end=\"23763\"\u003e\n\u003ctr data-start=\"22965\" data-end=\"23020\"\u003e\n\u003ctd data-start=\"22965\" data-end=\"22980\" data-col-size=\"sm\"\u003eProduct type\u003c\/td\u003e\n\u003ctd data-start=\"22980\" data-end=\"23020\" data-col-size=\"sm\"\u003eEducational gas-sensor working model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23021\" data-end=\"23057\"\u003e\n\u003ctd data-start=\"23021\" data-end=\"23042\" data-col-size=\"sm\"\u003eRecommended grades\u003c\/td\u003e\n\u003ctd data-start=\"23042\" data-end=\"23057\" data-col-size=\"sm\"\u003eGrades 7–12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23058\" data-end=\"23116\"\u003e\n\u003ctd data-start=\"23058\" data-end=\"23075\" data-col-size=\"sm\"\u003ePrimary sensor\u003c\/td\u003e\n\u003ctd data-start=\"23075\" data-end=\"23116\" data-col-size=\"sm\"\u003eMQ135 semiconductor gas-sensor module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23117\" data-end=\"23169\"\u003e\n\u003ctd data-start=\"23117\" data-end=\"23136\" data-col-size=\"sm\"\u003eDetection format\u003c\/td\u003e\n\u003ctd data-start=\"23136\" data-end=\"23169\" data-col-size=\"sm\"\u003eAdjustable threshold response\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23170\" data-end=\"23211\"\u003e\n\u003ctd data-start=\"23170\" data-end=\"23192\" data-col-size=\"sm\"\u003eSwitching component\u003c\/td\u003e\n\u003ctd data-start=\"23192\" data-end=\"23211\" data-col-size=\"sm\"\u003e5V relay module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23212\" data-end=\"23247\"\u003e\n\u003ctd data-start=\"23212\" data-end=\"23227\" data-col-size=\"sm\"\u003eAlert output\u003c\/td\u003e\n\u003ctd data-start=\"23227\" data-end=\"23247\" data-col-size=\"sm\"\u003e5V active buzzer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23248\" data-end=\"23302\"\u003e\n\u003ctd data-start=\"23248\" data-end=\"23269\" data-col-size=\"sm\"\u003eCircuit protection\u003c\/td\u003e\n\u003ctd data-start=\"23269\" data-end=\"23302\" data-col-size=\"sm\"\u003eInline reverse-polarity diode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23303\" data-end=\"23358\"\u003e\n\u003ctd data-start=\"23303\" data-end=\"23318\" data-col-size=\"sm\"\u003eDisplay type\u003c\/td\u003e\n\u003ctd data-start=\"23318\" data-end=\"23358\" data-col-size=\"sm\"\u003eAudible and indicator-based response\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23359\" data-end=\"23393\"\u003e\n\u003ctd data-start=\"23359\" data-end=\"23387\" data-col-size=\"sm\"\u003eGas concentration display\u003c\/td\u003e\n\u003ctd data-start=\"23387\" data-end=\"23393\" data-col-size=\"sm\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23394\" data-end=\"23421\"\u003e\n\u003ctd data-start=\"23394\" data-end=\"23415\" data-col-size=\"sm\"\u003ePPM or AQI reading\u003c\/td\u003e\n\u003ctd data-start=\"23415\" data-end=\"23421\" data-col-size=\"sm\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23422\" data-end=\"23449\"\u003e\n\u003ctd data-start=\"23422\" data-end=\"23443\" data-col-size=\"sm\"\u003eGas identification\u003c\/td\u003e\n\u003ctd data-start=\"23443\" data-end=\"23449\" data-col-size=\"sm\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23450\" data-end=\"23487\"\u003e\n\u003ctd data-start=\"23450\" data-end=\"23469\" data-col-size=\"sm\"\u003eBattery required\u003c\/td\u003e\n\u003ctd data-start=\"23469\" data-end=\"23487\" data-col-size=\"sm\"\u003eOne 9V battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23488\" data-end=\"23513\"\u003e\n\u003ctd data-start=\"23488\" data-end=\"23507\" data-col-size=\"sm\"\u003eBattery included\u003c\/td\u003e\n\u003ctd data-start=\"23507\" data-end=\"23513\" data-col-size=\"sm\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23514\" data-end=\"23553\"\u003e\n\u003ctd data-start=\"23514\" data-end=\"23547\" data-col-size=\"sm\"\u003eDemonstration lighter included\u003c\/td\u003e\n\u003ctd data-start=\"23547\" data-end=\"23553\" data-col-size=\"sm\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23554\" data-end=\"23601\"\u003e\n\u003ctd data-start=\"23554\" data-end=\"23571\" data-col-size=\"sm\"\u003eDigital manual\u003c\/td\u003e\n\u003ctd data-start=\"23571\" data-end=\"23601\" data-col-size=\"sm\"\u003eIncluded through QR access\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23602\" data-end=\"23663\"\u003e\n\u003ctd data-start=\"23602\" data-end=\"23624\" data-col-size=\"sm\"\u003eVideo demonstration\u003c\/td\u003e\n\u003ctd data-start=\"23624\" data-end=\"23663\" data-col-size=\"sm\"\u003eProduct gallery, YouTube and box QR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23664\" data-end=\"23707\"\u003e\n\u003ctd data-start=\"23664\" data-end=\"23689\" data-col-size=\"sm\"\u003eApproximate dimensions\u003c\/td\u003e\n\u003ctd data-start=\"23689\" data-end=\"23707\" data-col-size=\"sm\"\u003e16 × 11 × 8 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23708\" data-end=\"23763\"\u003e\n\u003ctd data-start=\"23708\" data-end=\"23723\" data-col-size=\"sm\"\u003eIntended use\u003c\/td\u003e\n\u003ctd data-start=\"23723\" data-end=\"23763\" data-col-size=\"sm\"\u003eSupervised educational demonstration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"23765\" data-end=\"23997\"\u003eThe product manual and packaging confirm the MQ135 sensor, relay, buzzer, protection diode, battery requirement, dimensions and educational-use limitations.\u003c\/p\u003e\n\u003ch1 data-section-id=\"uc35dk\" data-start=\"2504\" data-end=\"2550\"\u003eDetailed Full-Colour Digital Manual Included\u003c\/h1\u003e\n\u003ch2 data-section-id=\"44c37o\" data-start=\"2552\" data-end=\"2601\"\u003eScan, explore and demonstrate with confidence.\u003c\/h2\u003e\n\u003cp data-start=\"2603\" data-end=\"2769\"\u003eA QR code provided with the kit gives students access to a dedicated digital instruction and learning manual created specifically for the MQ135 Gas Alert Alarm model.\u003c\/p\u003e\n\u003cp data-start=\"2771\" data-end=\"2848\"\u003eThe manual can be opened on a phone, tablet or computer and revisited during:\u003c\/p\u003e\n\u003cul data-start=\"2850\" data-end=\"3062\"\u003e\n\u003cli data-section-id=\"xwutus\" data-start=\"2850\" data-end=\"2871\"\u003eProject preparation\u003c\/li\u003e\n\u003cli data-section-id=\"8wns25\" data-start=\"2872\" data-end=\"2898\"\u003eComponent identification\u003c\/li\u003e\n\u003cli data-section-id=\"12uzkgd\" data-start=\"2899\" data-end=\"2919\"\u003eClassroom learning\u003c\/li\u003e\n\u003cli data-section-id=\"12y2z1m\" data-start=\"2920\" data-end=\"2941\"\u003eDemonstration setup\u003c\/li\u003e\n\u003cli data-section-id=\"1bnwkld\" data-start=\"2942\" data-end=\"2971\"\u003eScience-exhibition practice\u003c\/li\u003e\n\u003cli data-section-id=\"1vdr806\" data-start=\"2972\" data-end=\"2996\"\u003eProject-report writing\u003c\/li\u003e\n\u003cli data-section-id=\"15rfreh\" data-start=\"2997\" data-end=\"3015\"\u003eViva preparation\u003c\/li\u003e\n\u003cli data-section-id=\"z1z1u8\" data-start=\"3016\" data-end=\"3033\"\u003eTroubleshooting\u003c\/li\u003e\n\u003cli data-section-id=\"1j1lfo5\" data-start=\"3034\" data-end=\"3062\"\u003eRevision and concept recap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3064\" data-end=\"3166\"\u003eThe current manual contains \u003cstrong data-start=\"3092\" data-end=\"3126\"\u003e16 colourful illustrated pages\u003c\/strong\u003e covering the complete learning journey.\u003c\/p\u003e\n\u003cp data-start=\"3168\" data-end=\"3180\"\u003eIt includes:\u003c\/p\u003e\n\u003cul data-start=\"3182\" data-end=\"3645\"\u003e\n\u003cli data-section-id=\"m0ys4z\" data-start=\"3182\" data-end=\"3224\"\u003eAn introduction to the gas-alert concept\u003c\/li\u003e\n\u003cli data-section-id=\"1jt7ipt\" data-start=\"3225\" data-end=\"3268\"\u003eA visual guide to the included components\u003c\/li\u003e\n\u003cli data-section-id=\"11cnjni\" data-start=\"3269\" data-end=\"3299\"\u003eMQ135 gas-sensor explanation\u003c\/li\u003e\n\u003cli data-section-id=\"10ymuix\" data-start=\"3300\" data-end=\"3344\"\u003eRelay-module and protection-diode concepts\u003c\/li\u003e\n\u003cli data-section-id=\"194vlct\" data-start=\"3345\" data-end=\"3387\"\u003eThe complete detection-to-alert sequence\u003c\/li\u003e\n\u003cli data-section-id=\"19wsdpu\" data-start=\"3388\" data-end=\"3430\"\u003eIllustrated setup and operating guidance\u003c\/li\u003e\n\u003cli data-section-id=\"y5dkx\" data-start=\"3431\" data-end=\"3482\"\u003eSensor warm-up and threshold-response information\u003c\/li\u003e\n\u003cli data-section-id=\"16qa3w7\" data-start=\"3483\" data-end=\"3518\"\u003eSupervised demonstration guidance\u003c\/li\u003e\n\u003cli data-section-id=\"s1r7wf\" data-start=\"3519\" data-end=\"3544\"\u003eTroubleshooting support\u003c\/li\u003e\n\u003cli data-section-id=\"1qnorld\" data-start=\"3545\" data-end=\"3591\"\u003eSafe shutdown, care and storage instructions\u003c\/li\u003e\n\u003cli data-section-id=\"1rf3i7h\" data-start=\"3592\" data-end=\"3607\"\u003eConcept recap\u003c\/li\u003e\n\u003cli data-section-id=\"m72qjv\" data-start=\"3608\" data-end=\"3645\"\u003ePrintable Certificate of Completion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3647\" data-end=\"3945\"\u003eThe component guide appears on pages 5–6, the complete working sequence on page 7, setup and supervised testing guidance on pages 8–10, troubleshooting on page 11, storage guidance on page 12, concept recap on page 13 and the completion certificate on page 15.\u003c\/p\u003e\n\u003chr data-start=\"3947\" data-end=\"3950\"\u003e\n\u003ch1 data-section-id=\"19mroy9\" data-start=\"3952\" data-end=\"3995\"\u003eStep-by-Step Video Demonstration Included\u003c\/h1\u003e\n\u003ch2 data-section-id=\"l62o57\" data-start=\"3997\" data-end=\"4059\"\u003eWatch the actual model before conducting the demonstration.\u003c\/h2\u003e\n\u003cp data-start=\"4061\" data-end=\"4181\"\u003eEvery kit also provides access to a dedicated video showing the physical model, its components and its working sequence.\u003c\/p\u003e\n\u003cp data-start=\"4183\" data-end=\"4215\"\u003eThe supplied video demonstrates:\u003c\/p\u003e\n\u003cul data-start=\"4217\" data-end=\"4499\"\u003e\n\u003cli data-section-id=\"1fi8y7h\" data-start=\"4217\" data-end=\"4247\"\u003eThe complete product and box\u003c\/li\u003e\n\u003cli data-section-id=\"7k5l0d\" data-start=\"4248\" data-end=\"4276\"\u003eThe contextual house model\u003c\/li\u003e\n\u003cli data-section-id=\"1ygcfkm\" data-start=\"4277\" data-end=\"4302\"\u003eThe MQ135 sensor module\u003c\/li\u003e\n\u003cli data-section-id=\"1j4r2p6\" data-start=\"4303\" data-end=\"4333\"\u003eThe relay and buzzer circuit\u003c\/li\u003e\n\u003cli data-section-id=\"kgh3sj\" data-start=\"4334\" data-end=\"4361\"\u003eThe pre-wired connections\u003c\/li\u003e\n\u003cli data-section-id=\"108h6x6\" data-start=\"4362\" data-end=\"4386\"\u003eThe battery connection\u003c\/li\u003e\n\u003cli data-section-id=\"wzj5ak\" data-start=\"4387\" data-end=\"4422\"\u003eThe sensor-response demonstration\u003c\/li\u003e\n\u003cli data-section-id=\"1bqq2nz\" data-start=\"4423\" data-end=\"4441\"\u003eRelay activation\u003c\/li\u003e\n\u003cli data-section-id=\"m8mk3p\" data-start=\"4442\" data-end=\"4465\"\u003eAudible buzzer output\u003c\/li\u003e\n\u003cli data-section-id=\"145lw8w\" data-start=\"4466\" data-end=\"4499\"\u003eSafe completion of the activity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4501\" data-end=\"4563\"\u003eThe video is available through three convenient access points:\u003c\/p\u003e\n\u003ch3 data-section-id=\"1nmiu3p\" data-start=\"4565\" data-end=\"4584\"\u003eProduct Gallery\u003c\/h3\u003e\n\u003cp data-start=\"4586\" data-end=\"4757\"\u003eThe demonstration video is included alongside the product images on the Go Science product page, allowing parents, teachers and students to view the model before purchase.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1iuekfw\" data-start=\"4759\" data-end=\"4789\"\u003eGo Science YouTube Channel\u003c\/h3\u003e\n\u003cp data-start=\"4791\" data-end=\"4913\"\u003eThe video is also published through the official Go Science YouTube presence for convenient viewing, sharing and revision.\u003c\/p\u003e\n\u003ch3 data-section-id=\"mu6kxf\" data-start=\"4915\" data-end=\"4941\"\u003eQR Code on the Kit Box\u003c\/h3\u003e\n\u003cp data-start=\"4943\" data-end=\"5097\"\u003eA QR code on the side of the product box provides quick access to the demonstration video whenever students need to revisit the setup or working sequence.\u003c\/p\u003e\n\u003cp data-start=\"5099\" data-end=\"5143\"\u003eThis creates a continuous guided experience:\u003c\/p\u003e\n\u003cp data-start=\"5145\" data-end=\"5195\"\u003e\u003cstrong data-start=\"5145\" data-end=\"5195\"\u003eScan → Watch → Prepare → Demonstrate → Rewatch\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"5197\" data-end=\"5291\"\u003eInternet access and a compatible QR-scanning device are required to open the online resources.\u003c\/p\u003e\n\u003ch1 data-section-id=\"jmeyqj\" data-start=\"5298\" data-end=\"5334\"\u003eFrom Gas Presence to Audible Alert\u003c\/h1\u003e\n\u003ch2 data-section-id=\"hy085y\" data-start=\"5336\" data-end=\"5399\"\u003eExplore how sensing, comparison and switching work together.\u003c\/h2\u003e\n\u003cp data-start=\"5401\" data-end=\"5467\"\u003eThe model presents gas detection as a connected electronic system.\u003c\/p\u003e\n\u003cp data-start=\"5469\" data-end=\"5661\"\u003eThe MQ135 module responds to changes around its heated semiconductor sensing element. Its onboard comparator evaluates the response against the threshold selected using the adjustment control.\u003c\/p\u003e\n\u003cp data-start=\"5663\" data-end=\"5862\"\u003eWhen the response crosses the selected threshold, the module changes its digital output state. This output activates the relay module, which switches the buzzer circuit and produces an audible alert.\u003c\/p\u003e\n\u003cp data-start=\"5864\" data-end=\"5904\"\u003eStudents can trace the complete pathway:\u003c\/p\u003e\n\u003cp data-start=\"5906\" data-end=\"5987\"\u003e\u003cstrong data-start=\"5906\" data-end=\"5987\"\u003eSurrounding Air → MQ135 Sensor → Comparator → Digital Signal → Relay → Buzzer\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"5989\" data-end=\"6140\"\u003eEach stage performs a specific function, allowing students to understand how several electronic components coordinate to produce an automatic response.\u003c\/p\u003e\n\u003chr data-start=\"6142\" data-end=\"6145\"\u003e\n\u003ch1 data-section-id=\"c01vee\" data-start=\"6147\" data-end=\"6181\"\u003ePre-Wired for Direct Exploration\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1sfjur0\" data-start=\"6183\" data-end=\"6227\"\u003eBegin with a complete working foundation.\u003c\/h2\u003e\n\u003cp data-start=\"6229\" data-end=\"6376\"\u003eThe MQ135 sensor, relay module, buzzer, protection diode, battery connector and interconnecting wires are arranged as one pre-wired working system.\u003c\/p\u003e\n\u003cp data-start=\"6378\" data-end=\"6444\"\u003eThis allows students to move directly into meaningful exploration:\u003c\/p\u003e\n\u003cul data-start=\"6446\" data-end=\"6951\"\u003e\n\u003cli data-section-id=\"ve7kda\" data-start=\"6446\" data-end=\"6487\"\u003eIdentify the function of each component\u003c\/li\u003e\n\u003cli data-section-id=\"gwmz1r\" data-start=\"6488\" data-end=\"6528\"\u003eObserve the sensor’s warm-up behaviour\u003c\/li\u003e\n\u003cli data-section-id=\"150uwy0\" data-start=\"6529\" data-end=\"6567\"\u003eUnderstand threshold-based detection\u003c\/li\u003e\n\u003cli data-section-id=\"8nlu3g\" data-start=\"6568\" data-end=\"6616\"\u003eFollow the digital signal from sensor to relay\u003c\/li\u003e\n\u003cli data-section-id=\"2tua64\" data-start=\"6617\" data-end=\"6665\"\u003eHear the relay’s mechanical switching response\u003c\/li\u003e\n\u003cli data-section-id=\"1pp1s4l\" data-start=\"6666\" data-end=\"6692\"\u003eObserve the buzzer alert\u003c\/li\u003e\n\u003cli data-section-id=\"jsa3wg\" data-start=\"6693\" data-end=\"6737\"\u003eConduct repeated supervised demonstrations\u003c\/li\u003e\n\u003cli data-section-id=\"1fvmc0w\" data-start=\"6738\" data-end=\"6777\"\u003eCompare clean-air and test conditions\u003c\/li\u003e\n\u003cli data-section-id=\"5g6rvc\" data-start=\"6778\" data-end=\"6811\"\u003eRecord and explain observations\u003c\/li\u003e\n\u003cli data-section-id=\"mpc2n1\" data-start=\"6812\" data-end=\"6846\"\u003eInvestigate threshold adjustment\u003c\/li\u003e\n\u003cli data-section-id=\"13qmr26\" data-start=\"6847\" data-end=\"6889\"\u003eTroubleshoot changes in system behaviour\u003c\/li\u003e\n\u003cli data-section-id=\"1uih45a\" data-start=\"6890\" data-end=\"6951\"\u003eConnect the model with wider sensor and automation concepts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"6953\" data-end=\"6981\"\u003eThe model is designed to be:\u003c\/p\u003e\n\u003cp data-start=\"6983\" data-end=\"7053\"\u003e\u003cstrong data-start=\"6983\" data-end=\"7053\"\u003eObserved → Tested → Retested → Understood → Explained → Built Upon\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch1 data-section-id=\"19y3zfv\" data-start=\"7060\" data-end=\"7095\"\u003eWatch the Complete System Respond\u003c\/h1\u003e\n\u003ch2 data-section-id=\"17a2hn7\" data-start=\"7097\" data-end=\"7118\"\u003e1. Power the Model\u003c\/h2\u003e\n\u003cp data-start=\"7120\" data-end=\"7189\"\u003eConnect a fresh 9V battery using the supplied battery snap connector.\u003c\/p\u003e\n\u003cp data-start=\"7191\" data-end=\"7275\"\u003eThe sensor module receives power and its onboard heating element begins stabilising.\u003c\/p\u003e\n\u003ch2 data-section-id=\"zmoya2\" data-start=\"7277\" data-end=\"7312\"\u003e2. Allow the Sensor to Stabilise\u003c\/h2\u003e\n\u003cp data-start=\"7314\" data-end=\"7398\"\u003eThe MQ135 sensor requires a brief warm-up period before the classroom demonstration.\u003c\/p\u003e\n\u003cp data-start=\"7400\" data-end=\"7497\"\u003eDuring this time, its internal sensing element begins reaching a more stable operating condition.\u003c\/p\u003e\n\u003ch2 data-section-id=\"iitsrl\" data-start=\"7499\" data-end=\"7532\"\u003e3. Monitor the Surrounding Air\u003c\/h2\u003e\n\u003cp data-start=\"7534\" data-end=\"7576\"\u003eThe MQ135 module acts as the system input.\u003c\/p\u003e\n\u003cp data-start=\"7578\" data-end=\"7659\"\u003eIt responds to changes in the gas or vapour conditions close to its sensing mesh.\u003c\/p\u003e\n\u003ch2 data-section-id=\"cct44i\" data-start=\"7661\" data-end=\"7687\"\u003e4. Compare the Response\u003c\/h2\u003e\n\u003cp data-start=\"7689\" data-end=\"7794\"\u003eThe module’s onboard comparator evaluates the sensor response against the selected sensitivity threshold.\u003c\/p\u003e\n\u003ch2 data-section-id=\"lbxxzw\" data-start=\"7796\" data-end=\"7819\"\u003e5. Trigger the Relay\u003c\/h2\u003e\n\u003cp data-start=\"7821\" data-end=\"7929\"\u003eWhen the response crosses the threshold, the module’s digital output sends a trigger to the 5V relay module.\u003c\/p\u003e\n\u003cp data-start=\"7931\" data-end=\"7995\"\u003eStudents may hear the relay produce a distinct mechanical click.\u003c\/p\u003e\n\u003ch2 data-section-id=\"pju6ix\" data-start=\"7997\" data-end=\"8018\"\u003e6. Sound the Alert\u003c\/h2\u003e\n\u003cp data-start=\"8020\" data-end=\"8059\"\u003eThe relay completes the buzzer circuit.\u003c\/p\u003e\n\u003cp data-start=\"8061\" data-end=\"8148\"\u003eThe active buzzer produces a clear audible alert representing the output of the system.\u003c\/p\u003e\n\u003ch2 data-section-id=\"2v7ns9\" data-start=\"8150\" data-end=\"8161\"\u003e7. Reset\u003c\/h2\u003e\n\u003cp data-start=\"8163\" data-end=\"8300\"\u003eWhen the test vapour disperses into fresh air and the sensor response moves below the threshold, the relay releases and the buzzer stops.\u003c\/p\u003e\n\u003cp data-start=\"8302\" data-end=\"8338\"\u003eThe complete functional sequence is:\u003c\/p\u003e\n\u003cp data-start=\"8340\" data-end=\"8419\"\u003e\u003cstrong data-start=\"8340\" data-end=\"8419\"\u003eGas or Vapour Detected → Threshold Crossed → Relay Activated → Buzzer Alert\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"8421\" data-end=\"8608\"\u003eThe supplied technical manual confirms the use of the MQ135 module, adjustable comparator, relay switching stage, active buzzer and protection diode.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1gz27vy\" data-start=\"8615\" data-end=\"8645\"\u003eExplore the MQ135 Gas Sensor\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1rw69e7\" data-start=\"8647\" data-end=\"8714\"\u003eObserve how a semiconductor sensor responds to its surroundings.\u003c\/h2\u003e\n\u003cp data-start=\"8716\" data-end=\"8813\"\u003eThe MQ135 module contains a heated sensing element based on a tin-dioxide semiconductor material.\u003c\/p\u003e\n\u003cp data-start=\"8815\" data-end=\"9012\"\u003eIts electrical behaviour changes when it is exposed to certain gases and vapours. The sensor module converts this change into an electronic response that can be evaluated by its comparator circuit.\u003c\/p\u003e\n\u003cp data-start=\"9014\" data-end=\"9088\"\u003eThe MQ135 is commonly responsive to several substances, which may include:\u003c\/p\u003e\n\u003cul data-start=\"9090\" data-end=\"9214\"\u003e\n\u003cli data-section-id=\"18v1txc\" data-start=\"9090\" data-end=\"9099\"\u003eAmmonia\u003c\/li\u003e\n\u003cli data-section-id=\"1fzt86l\" data-start=\"9100\" data-end=\"9116\"\u003eAlcohol vapour\u003c\/li\u003e\n\u003cli data-section-id=\"11e5bgr\" data-start=\"9117\" data-end=\"9142\"\u003eBenzene-related vapours\u003c\/li\u003e\n\u003cli data-section-id=\"178irg7\" data-start=\"9143\" data-end=\"9150\"\u003eSmoke\u003c\/li\u003e\n\u003cli data-section-id=\"181u5o9\" data-start=\"9151\" data-end=\"9181\"\u003eNitrogen-oxide-related gases\u003c\/li\u003e\n\u003cli data-section-id=\"ep64z7\" data-start=\"9182\" data-end=\"9214\"\u003eCarbon-dioxide-related changes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"9216\" data-end=\"9445\"\u003eThe response is broad and may be influenced by several gases, vapours and environmental conditions. The model therefore demonstrates \u003cstrong data-start=\"9349\" data-end=\"9388\"\u003egeneral threshold-based gas sensing\u003c\/strong\u003e rather than identifying a particular gas with certainty.\u003c\/p\u003e\n\u003cp data-start=\"9447\" data-end=\"9468\"\u003eStudents can explore:\u003c\/p\u003e\n\u003cul data-start=\"9470\" data-end=\"9738\"\u003e\n\u003cli data-section-id=\"fhmsn1\" data-start=\"9470\" data-end=\"9497\"\u003eSemiconductor gas sensing\u003c\/li\u003e\n\u003cli data-section-id=\"19vwfze\" data-start=\"9498\" data-end=\"9522\"\u003eHeated sensor elements\u003c\/li\u003e\n\u003cli data-section-id=\"n62mfg\" data-start=\"9523\" data-end=\"9556\"\u003eElectrical conductivity changes\u003c\/li\u003e\n\u003cli data-section-id=\"101zx7h\" data-start=\"9557\" data-end=\"9574\"\u003eSensor response\u003c\/li\u003e\n\u003cli data-section-id=\"8fz9i8\" data-start=\"9575\" data-end=\"9600\"\u003eGas and vapour presence\u003c\/li\u003e\n\u003cli data-section-id=\"1mmgjw5\" data-start=\"9601\" data-end=\"9623\"\u003eEnvironmental inputs\u003c\/li\u003e\n\u003cli data-section-id=\"e16b8l\" data-start=\"9624\" data-end=\"9645\"\u003eSignal conditioning\u003c\/li\u003e\n\u003cli data-section-id=\"oed5wi\" data-start=\"9646\" data-end=\"9678\"\u003eCause-and-effect relationships\u003c\/li\u003e\n\u003cli data-section-id=\"d031fo\" data-start=\"9679\" data-end=\"9738\"\u003eHow changing surroundings can create an electronic output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"9740\" data-end=\"9919\"\u003eThe model does not display gas concentration, parts per million, AQI or the identity of a detected gas.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1gkamlt\" data-start=\"9926\" data-end=\"9962\"\u003eDiscover Threshold-Based Detection\u003c\/h1\u003e\n\u003ch2 data-section-id=\"cwgfd0\" data-start=\"9964\" data-end=\"10021\"\u003eSee how an adjustable setting creates a trigger point.\u003c\/h2\u003e\n\u003cp data-start=\"10023\" data-end=\"10111\"\u003eThe onboard comparator checks the changing sensor response against a selected threshold.\u003c\/p\u003e\n\u003cp data-start=\"10113\" data-end=\"10301\"\u003eThis introduces an important electronic concept: a sensor may produce a continuously changing response, while a comparator determines when that response has crossed a chosen trigger level.\u003c\/p\u003e\n\u003cp data-start=\"10303\" data-end=\"10324\"\u003eStudents can observe:\u003c\/p\u003e\n\u003cul data-start=\"10326\" data-end=\"10584\"\u003e\n\u003cli data-section-id=\"4im5ng\" data-start=\"10326\" data-end=\"10369\"\u003eThe sensor producing the initial response\u003c\/li\u003e\n\u003cli data-section-id=\"1mbvbtb\" data-start=\"10370\" data-end=\"10411\"\u003eThe comparator evaluating that response\u003c\/li\u003e\n\u003cli data-section-id=\"3vkqx2\" data-start=\"10412\" data-end=\"10467\"\u003eThe sensitivity control influencing the trigger point\u003c\/li\u003e\n\u003cli data-section-id=\"1gn27ls\" data-start=\"10468\" data-end=\"10503\"\u003eThe digital output changing state\u003c\/li\u003e\n\u003cli data-section-id=\"au0m7x\" data-start=\"10504\" data-end=\"10537\"\u003eThe relay receiving the trigger\u003c\/li\u003e\n\u003cli data-section-id=\"3n8dzt\" data-start=\"10538\" data-end=\"10584\"\u003eThe buzzer responding to the threshold event\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"10586\" data-end=\"10670\"\u003eUnder adult or teacher guidance, small threshold adjustments may be used to explore:\u003c\/p\u003e\n\u003cul data-start=\"10672\" data-end=\"10954\"\u003e\n\u003cli data-section-id=\"1e87ww4\" data-start=\"10672\" data-end=\"10712\"\u003eWhy the buzzer may activate too easily\u003c\/li\u003e\n\u003cli data-section-id=\"1u298y9\" data-start=\"10713\" data-end=\"10768\"\u003eWhy the sensor may require fresh air before resetting\u003c\/li\u003e\n\u003cli data-section-id=\"174bv8p\" data-start=\"10769\" data-end=\"10810\"\u003eHow sensitivity influences the response\u003c\/li\u003e\n\u003cli data-section-id=\"1bs8tia\" data-start=\"10811\" data-end=\"10854\"\u003eWhy ambient conditions can affect sensing\u003c\/li\u003e\n\u003cli data-section-id=\"1dgrkn0\" data-start=\"10855\" data-end=\"10908\"\u003eWhy only one adjustment should be changed at a time\u003c\/li\u003e\n\u003cli data-section-id=\"zsdm18\" data-start=\"10909\" data-end=\"10954\"\u003eHow the model can be reset and tested again\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"10956\" data-end=\"11031\"\u003eThis is a threshold demonstration, not a calibrated measurement instrument.\u003c\/p\u003e\n\u003chr data-start=\"11033\" data-end=\"11036\"\u003e\n\u003ch1 data-section-id=\"1jaeis2\" data-start=\"11038\" data-end=\"11069\"\u003eExplore Relay-Based Switching\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1xeoywh\" data-start=\"11071\" data-end=\"11135\"\u003eHear an electrical signal become a physical switching action.\u003c\/h2\u003e\n\u003cp data-start=\"11137\" data-end=\"11223\"\u003eThe model includes a 5V relay module between the sensor output and the buzzer circuit.\u003c\/p\u003e\n\u003cp data-start=\"11225\" data-end=\"11390\"\u003eWhen the MQ135 module produces the trigger signal, the relay’s internal electromagnetic coil activates. Its contacts change position and complete the buzzer circuit.\u003c\/p\u003e\n\u003cp data-start=\"11392\" data-end=\"11413\"\u003eStudents can explore:\u003c\/p\u003e\n\u003cul data-start=\"11415\" data-end=\"11710\"\u003e\n\u003cli data-section-id=\"xtcmps\" data-start=\"11415\" data-end=\"11439\"\u003eElectromagnetic relays\u003c\/li\u003e\n\u003cli data-section-id=\"1784yj5\" data-start=\"11440\" data-end=\"11453\"\u003eRelay coils\u003c\/li\u003e\n\u003cli data-section-id=\"qngu7r\" data-start=\"11454\" data-end=\"11506\"\u003eCommon, Normally Open and Normally Closed contacts\u003c\/li\u003e\n\u003cli data-section-id=\"1vb81gr\" data-start=\"11507\" data-end=\"11542\"\u003eElectrically controlled switching\u003c\/li\u003e\n\u003cli data-section-id=\"tfjkun\" data-start=\"11543\" data-end=\"11572\"\u003eMechanical switching action\u003c\/li\u003e\n\u003cli data-section-id=\"1g0id1x\" data-start=\"11573\" data-end=\"11600\"\u003eSensor-controlled outputs\u003c\/li\u003e\n\u003cli data-section-id=\"1e5hjna\" data-start=\"11601\" data-end=\"11635\"\u003eInput, control and output stages\u003c\/li\u003e\n\u003cli data-section-id=\"1j6tpp8\" data-start=\"11636\" data-end=\"11681\"\u003eHow one circuit can control another circuit\u003c\/li\u003e\n\u003cli data-section-id=\"1nxmr28\" data-start=\"11682\" data-end=\"11710\"\u003eAutomatic response systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"11712\" data-end=\"11831\"\u003eThe relay’s indicator and mechanical click provide visible and audible evidence that the switching stage has activated.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1x4ls0c\" data-start=\"11838\" data-end=\"11867\"\u003eReverse-Polarity Protection\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1fih18h\" data-start=\"11869\" data-end=\"11927\"\u003eExplore how a diode helps protect an electronic system.\u003c\/h2\u003e\n\u003cp data-start=\"11929\" data-end=\"12033\"\u003eThe model includes an inline protection diode between the battery connection and the electronic circuit.\u003c\/p\u003e\n\u003cp data-start=\"12035\" data-end=\"12253\"\u003eA diode allows current to flow primarily in one direction. If the battery is accidentally connected with reversed polarity, the diode helps block the incorrect current path and protect the sensitive circuit components.\u003c\/p\u003e\n\u003cp data-start=\"12255\" data-end=\"12276\"\u003eStudents can explore:\u003c\/p\u003e\n\u003cul data-start=\"12278\" data-end=\"12478\"\u003e\n\u003cli data-section-id=\"1cb3pnz\" data-start=\"12278\" data-end=\"12310\"\u003ePositive and negative polarity\u003c\/li\u003e\n\u003cli data-section-id=\"11opif3\" data-start=\"12311\" data-end=\"12338\"\u003eDirection of current flow\u003c\/li\u003e\n\u003cli data-section-id=\"2xgtle\" data-start=\"12339\" data-end=\"12356\"\u003eDiode behaviour\u003c\/li\u003e\n\u003cli data-section-id=\"1oumn2a\" data-start=\"12357\" data-end=\"12386\"\u003eReverse-polarity protection\u003c\/li\u003e\n\u003cli data-section-id=\"pr26cn\" data-start=\"12387\" data-end=\"12414\"\u003eCircuit-protection design\u003c\/li\u003e\n\u003cli data-section-id=\"5gkp3s\" data-start=\"12415\" data-end=\"12478\"\u003eWhy electronic components require correct battery orientation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"12480\" data-end=\"12655\"\u003eThe diode provides an additional protective feature. The battery must still always be connected carefully and in the correct orientation.\u003c\/p\u003e\n\u003ch1 data-section-id=\"kzdfrs\" data-start=\"12662\" data-end=\"12705\"\u003eUnderstand the Complete Functional System\u003c\/h1\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"12707\" data-end=\"13487\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"12707\" data-end=\"12746\"\u003e\n\u003ctr data-start=\"12707\" data-end=\"12746\"\u003e\n\u003cth data-start=\"12707\" data-end=\"12722\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSystem stage\u003c\/th\u003e\n\u003cth data-start=\"12722\" data-end=\"12734\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eComponent\u003c\/th\u003e\n\u003cth data-start=\"12734\" data-end=\"12746\" data-col-size=\"md\" class=\"last:pe-10\"\u003eFunction\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"12761\" data-end=\"13487\"\u003e\n\u003ctr data-start=\"12761\" data-end=\"12846\"\u003e\n\u003ctd data-start=\"12761\" data-end=\"12773\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"12763\" data-end=\"12772\"\u003eInput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"12773\" data-end=\"12788\" data-col-size=\"sm\"\u003eMQ135 sensor\u003c\/td\u003e\n\u003ctd data-start=\"12788\" data-end=\"12846\" data-col-size=\"md\"\u003eResponds to changes in nearby gas or vapour conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"12847\" data-end=\"12946\"\u003e\n\u003ctd data-start=\"12847\" data-end=\"12864\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"12849\" data-end=\"12863\"\u003eComparison\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"12864\" data-end=\"12885\" data-col-size=\"sm\"\u003eOnboard comparator\u003c\/td\u003e\n\u003ctd data-start=\"12885\" data-end=\"12946\" data-col-size=\"md\"\u003eCompares the sensor response with an adjustable threshold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"12947\" data-end=\"13020\"\u003e\n\u003ctd data-start=\"12947\" data-end=\"12960\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"12949\" data-end=\"12959\"\u003eSignal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"12960\" data-end=\"12977\" data-col-size=\"sm\"\u003eDigital output\u003c\/td\u003e\n\u003ctd data-start=\"12977\" data-end=\"13020\" data-col-size=\"md\"\u003eCarries the trigger to the relay module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13021\" data-end=\"13086\"\u003e\n\u003ctd data-start=\"13021\" data-end=\"13037\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"13023\" data-end=\"13036\"\u003eSwitching\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"13037\" data-end=\"13055\" data-col-size=\"sm\"\u003e5V relay module\u003c\/td\u003e\n\u003ctd data-start=\"13055\" data-end=\"13086\" data-col-size=\"md\"\u003eControls the buzzer circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13087\" data-end=\"13146\"\u003e\n\u003ctd data-start=\"13087\" data-end=\"13100\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"13089\" data-end=\"13099\"\u003eOutput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"13100\" data-end=\"13116\" data-col-size=\"sm\"\u003eActive buzzer\u003c\/td\u003e\n\u003ctd data-start=\"13116\" data-end=\"13146\" data-col-size=\"md\"\u003eProduces the audible alert\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13147\" data-end=\"13227\"\u003e\n\u003ctd data-start=\"13147\" data-end=\"13164\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"13149\" data-end=\"13163\"\u003eProtection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"13164\" data-end=\"13179\" data-col-size=\"sm\"\u003eInline diode\u003c\/td\u003e\n\u003ctd data-start=\"13179\" data-end=\"13227\" data-col-size=\"md\"\u003eHelps guard against reverse battery polarity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13228\" data-end=\"13293\"\u003e\n\u003ctd data-start=\"13228\" data-end=\"13240\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"13230\" data-end=\"13239\"\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"13240\" data-end=\"13253\" data-col-size=\"sm\"\u003e9V battery\u003c\/td\u003e\n\u003ctd data-start=\"13253\" data-end=\"13293\" data-col-size=\"md\"\u003eSupplies power for the demonstration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13294\" data-end=\"13383\"\u003e\n\u003ctd data-start=\"13294\" data-end=\"13308\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"13296\" data-end=\"13307\"\u003eContext\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"13308\" data-end=\"13322\" data-col-size=\"sm\"\u003eHouse model\u003c\/td\u003e\n\u003ctd data-start=\"13322\" data-end=\"13383\" data-col-size=\"md\"\u003eProvides a recognisable home-safety demonstration setting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13384\" data-end=\"13487\"\u003e\n\u003ctd data-start=\"13384\" data-end=\"13407\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"13386\" data-end=\"13406\"\u003eLearning support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"13407\" data-end=\"13426\" data-col-size=\"sm\"\u003eManual and video\u003c\/td\u003e\n\u003ctd data-start=\"13426\" data-end=\"13487\" data-col-size=\"md\"\u003eGuide setup, observation, explanation and troubleshooting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch1 data-section-id=\"1uro89g\" data-start=\"13494\" data-end=\"13541\"\u003e\u003c\/h1\u003e\n\u003ch1 data-section-id=\"1uro89g\" data-start=\"13494\" data-end=\"13541\"\u003eA Home-Safety Context Students Can Understand\u003c\/h1\u003e\n\u003ch2 data-section-id=\"18u4la6\" data-start=\"13543\" data-end=\"13604\"\u003eConnect sensor technology with a recognisable application.\u003c\/h2\u003e\n\u003cp data-start=\"13606\" data-end=\"13666\"\u003eThe house-based model gives the electronics a clear context.\u003c\/p\u003e\n\u003cp data-start=\"13668\" data-end=\"13727\"\u003eEach element represents a stage within a gas-alert concept:\u003c\/p\u003e\n\u003cul data-start=\"13729\" data-end=\"14114\"\u003e\n\u003cli data-section-id=\"c7nrkv\" data-start=\"13729\" data-end=\"13787\"\u003eThe \u003cstrong data-start=\"13735\" data-end=\"13750\"\u003ehouse model\u003c\/strong\u003e represents the area being monitored.\u003c\/li\u003e\n\u003cli data-section-id=\"1sjvbpb\" data-start=\"13788\" data-end=\"13842\"\u003eThe \u003cstrong data-start=\"13794\" data-end=\"13810\"\u003eMQ135 sensor\u003c\/strong\u003e represents the detection stage.\u003c\/li\u003e\n\u003cli data-section-id=\"oo8v38\" data-start=\"13843\" data-end=\"13898\"\u003eThe \u003cstrong data-start=\"13849\" data-end=\"13863\"\u003ecomparator\u003c\/strong\u003e represents the decision threshold.\u003c\/li\u003e\n\u003cli data-section-id=\"16i2iv5\" data-start=\"13899\" data-end=\"13956\"\u003eThe \u003cstrong data-start=\"13905\" data-end=\"13914\"\u003erelay\u003c\/strong\u003e represents the automatic switching stage.\u003c\/li\u003e\n\u003cli data-section-id=\"6it0ni\" data-start=\"13957\" data-end=\"14012\"\u003eThe \u003cstrong data-start=\"13963\" data-end=\"13973\"\u003ebuzzer\u003c\/strong\u003e represents the audible warning output.\u003c\/li\u003e\n\u003cli data-section-id=\"tqqd5u\" data-start=\"14013\" data-end=\"14056\"\u003eThe \u003cstrong data-start=\"14019\" data-end=\"14030\"\u003ebattery\u003c\/strong\u003e powers the demonstration.\u003c\/li\u003e\n\u003cli data-section-id=\"5war7k\" data-start=\"14057\" data-end=\"14114\"\u003eThe \u003cstrong data-start=\"14063\" data-end=\"14083\"\u003eprotection diode\u003c\/strong\u003e represents circuit protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"14116\" data-end=\"14198\"\u003eThis arrangement helps students explain not only what each component is, but also:\u003c\/p\u003e\n\u003cul data-start=\"14200\" data-end=\"14381\"\u003e\n\u003cli data-section-id=\"lc0tb6\" data-start=\"14200\" data-end=\"14219\"\u003eWhy it is present\u003c\/li\u003e\n\u003cli data-section-id=\"28tgwb\" data-start=\"14220\" data-end=\"14250\"\u003eWhat information it receives\u003c\/li\u003e\n\u003cli data-section-id=\"13axo3y\" data-start=\"14251\" data-end=\"14288\"\u003eWhat decision or action it performs\u003c\/li\u003e\n\u003cli data-section-id=\"30tv00\" data-start=\"14289\" data-end=\"14326\"\u003eHow it connects with the next stage\u003c\/li\u003e\n\u003cli data-section-id=\"4rgo43\" data-start=\"14327\" data-end=\"14381\"\u003eHow all stages work together as one automatic system\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"14383\" data-end=\"14500\"\u003eThe house layout creates a home-safety awareness context. It does not make the product a real home-protection device.\u003c\/p\u003e\n\u003ch1 data-section-id=\"z0ux1z\" data-start=\"14507\" data-end=\"14533\"\u003eTest. Observe. Discover.\u003c\/h1\u003e\n\u003cp data-start=\"14535\" data-end=\"14682\"\u003eAll demonstrations must be performed only by an adult or teacher in a well-ventilated area, away from flames, sparks, heat and flammable materials.\u003c\/p\u003e\n\u003ch2 data-section-id=\"19qnne6\" data-start=\"14684\" data-end=\"14717\"\u003eClean-Air Baseline Observation\u003c\/h2\u003e\n\u003cp data-start=\"14719\" data-end=\"14769\"\u003ePower the model and allow the sensor to stabilise.\u003c\/p\u003e\n\u003cp data-start=\"14771\" data-end=\"14787\"\u003eObserve whether:\u003c\/p\u003e\n\u003cul data-start=\"14789\" data-end=\"14922\"\u003e\n\u003cli data-section-id=\"1vjrilz\" data-start=\"14789\" data-end=\"14825\"\u003eThe power indicator is illuminated\u003c\/li\u003e\n\u003cli data-section-id=\"1j3srcm\" data-start=\"14826\" data-end=\"14854\"\u003eThe relay remains inactive\u003c\/li\u003e\n\u003cli data-section-id=\"qs223b\" data-start=\"14855\" data-end=\"14882\"\u003eThe buzzer remains silent\u003c\/li\u003e\n\u003cli data-section-id=\"1wy0wsf\" data-start=\"14883\" data-end=\"14922\"\u003eThe module reaches a stable condition\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1ujtagu\" data-start=\"14924\" data-end=\"14957\"\u003eThreshold-Response Observation\u003c\/h2\u003e\n\u003cp data-start=\"14959\" data-end=\"15087\"\u003eUnder adult or teacher control, expose the sensor briefly to the approved demonstration condition shown in the manual and video.\u003c\/p\u003e\n\u003cp data-start=\"15089\" data-end=\"15110\"\u003eObserve the sequence:\u003c\/p\u003e\n\u003col data-start=\"15112\" data-end=\"15351\"\u003e\n\u003cli data-section-id=\"1edfod6\" data-start=\"15112\" data-end=\"15140\"\u003eSensor response changes\u003c\/li\u003e\n\u003cli data-section-id=\"e4h0f5\" data-start=\"15141\" data-end=\"15177\"\u003eComparator threshold is crossed\u003c\/li\u003e\n\u003cli data-section-id=\"urhlox\" data-start=\"15178\" data-end=\"15198\"\u003eRelay activates\u003c\/li\u003e\n\u003cli data-section-id=\"b9bbgx\" data-start=\"15199\" data-end=\"15237\"\u003eRelay produces a mechanical click\u003c\/li\u003e\n\u003cli data-section-id=\"1425p4e\" data-start=\"15238\" data-end=\"15256\"\u003eBuzzer sounds\u003c\/li\u003e\n\u003cli data-section-id=\"1p98e8e\" data-start=\"15257\" data-end=\"15284\"\u003eTest source is removed\u003c\/li\u003e\n\u003cli data-section-id=\"15p0rwn\" data-start=\"15285\" data-end=\"15313\"\u003eGas or vapour disperses\u003c\/li\u003e\n\u003cli data-section-id=\"a7hxl6\" data-start=\"15314\" data-end=\"15333\"\u003eRelay releases\u003c\/li\u003e\n\u003cli data-section-id=\"15j6wyh\" data-start=\"15334\" data-end=\"15351\"\u003eBuzzer stops\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 data-section-id=\"1sczom\" data-start=\"15353\" data-end=\"15374\"\u003eRepeatability Test\u003c\/h2\u003e\n\u003cp data-start=\"15376\" data-end=\"15458\"\u003eAfter the sensor returns to its normal state, repeat the supervised demonstration.\u003c\/p\u003e\n\u003cp data-start=\"15460\" data-end=\"15511\"\u003eRecord whether the same functional sequence occurs.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1gakd1o\" data-start=\"15513\" data-end=\"15549\"\u003eResponse-and-Recovery Observation\u003c\/h2\u003e\n\u003cp data-start=\"15551\" data-end=\"15571\"\u003eObserve both stages:\u003c\/p\u003e\n\u003cul data-start=\"15573\" data-end=\"15691\"\u003e\n\u003cli data-section-id=\"1ui12vt\" data-start=\"15573\" data-end=\"15634\"\u003eHow the system reacts when the test condition is introduced\u003c\/li\u003e\n\u003cli data-section-id=\"m5h0xl\" data-start=\"15635\" data-end=\"15691\"\u003eHow the system resets after the surrounding air clears\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"etvoll\" data-start=\"15693\" data-end=\"15719\"\u003eSensitivity Exploration\u003c\/h2\u003e\n\u003cp data-start=\"15721\" data-end=\"15803\"\u003eUnder teacher guidance, make a very small adjustment to the onboard potentiometer.\u003c\/p\u003e\n\u003cp data-start=\"15805\" data-end=\"15874\"\u003eRepeat the observation and compare how the trigger behaviour changes.\u003c\/p\u003e\n\u003cp data-start=\"15876\" data-end=\"15968\"\u003eOnly small controlled adjustments should be made, and the original position should be noted.\u003c\/p\u003e\n\u003ch2 data-section-id=\"6ow1gb\" data-start=\"15970\" data-end=\"15998\"\u003eSignal-Path Investigation\u003c\/h2\u003e\n\u003cp data-start=\"16000\" data-end=\"16032\"\u003eStudents can identify and trace:\u003c\/p\u003e\n\u003cul data-start=\"16034\" data-end=\"16183\"\u003e\n\u003cli data-section-id=\"8oz888\" data-start=\"16034\" data-end=\"16048\"\u003eSensor input\u003c\/li\u003e\n\u003cli data-section-id=\"19e837q\" data-start=\"16049\" data-end=\"16067\"\u003eComparator stage\u003c\/li\u003e\n\u003cli data-section-id=\"1dge92h\" data-start=\"16068\" data-end=\"16089\"\u003eDigital-output wire\u003c\/li\u003e\n\u003cli data-section-id=\"171fw4d\" data-start=\"16090\" data-end=\"16103\"\u003eRelay input\u003c\/li\u003e\n\u003cli data-section-id=\"133fmiy\" data-start=\"16104\" data-end=\"16130\"\u003eRelay switching contacts\u003c\/li\u003e\n\u003cli data-section-id=\"1adg1sr\" data-start=\"16131\" data-end=\"16147\"\u003eBuzzer circuit\u003c\/li\u003e\n\u003cli data-section-id=\"6y3wxi\" data-start=\"16148\" data-end=\"16164\"\u003eBattery supply\u003c\/li\u003e\n\u003cli data-section-id=\"eqhw7c\" data-start=\"16165\" data-end=\"16183\"\u003eProtection diode\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"16185\" data-end=\"16188\"\u003e\n\u003ch1 data-section-id=\"st14a9\" data-start=\"16190\" data-end=\"16225\"\u003eLearn Through Every Demonstration\u003c\/h1\u003e\n\u003ch3 data-section-id=\"74yqa7\" data-start=\"16227\" data-end=\"16236\"\u003eWatch\u003c\/h3\u003e\n\u003cp data-start=\"16238\" data-end=\"16281\"\u003eReview the complete video before beginning.\u003c\/p\u003e\n\u003ch3 data-section-id=\"y9l8or\" data-start=\"16283\" data-end=\"16294\"\u003ePredict\u003c\/h3\u003e\n\u003cp data-start=\"16296\" data-end=\"16368\"\u003eWill the buzzer activate when the sensor response crosses the threshold?\u003c\/p\u003e\n\u003ch3 data-section-id=\"y9uabr\" data-start=\"16370\" data-end=\"16381\"\u003ePrepare\u003c\/h3\u003e\n\u003cp data-start=\"16383\" data-end=\"16448\"\u003ePlace the model in a safe and well-ventilated demonstration area.\u003c\/p\u003e\n\u003ch3 data-section-id=\"sizzw\" data-start=\"16450\" data-end=\"16461\"\u003eObserve\u003c\/h3\u003e\n\u003cp data-start=\"16463\" data-end=\"16541\"\u003eWatch the indicators, listen for the relay click and hear the buzzer response.\u003c\/p\u003e\n\u003ch3 data-section-id=\"pjpz2j\" data-start=\"16543\" data-end=\"16553\"\u003eRecord\u003c\/h3\u003e\n\u003cp data-start=\"16555\" data-end=\"16624\"\u003eDocument the sensor condition, threshold setting and output response.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1ob2s0x\" data-start=\"16626\" data-end=\"16637\"\u003eCompare\u003c\/h3\u003e\n\u003cp data-start=\"16639\" data-end=\"16707\"\u003eCompare the normal-air condition with the supervised test condition.\u003c\/p\u003e\n\u003ch3 data-section-id=\"14mypyj\" data-start=\"16709\" data-end=\"16720\"\u003eAnalyse\u003c\/h3\u003e\n\u003cp data-start=\"16722\" data-end=\"16788\"\u003eExplain why the relay activated or why the system remained silent.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1bn6r32\" data-start=\"16790\" data-end=\"16806\"\u003eTroubleshoot\u003c\/h3\u003e\n\u003cp data-start=\"16808\" data-end=\"16904\"\u003eCheck the battery, sensor warm-up, surrounding air, sensitivity control and visible connections.\u003c\/p\u003e\n\u003ch3 data-section-id=\"16njeap\" data-start=\"16906\" data-end=\"16917\"\u003eExplain\u003c\/h3\u003e\n\u003cp data-start=\"16919\" data-end=\"16965\"\u003eDescribe the complete sensor-to-alert pathway.\u003c\/p\u003e\n\u003ch3 data-section-id=\"gd19q8\" data-start=\"16967\" data-end=\"16977\"\u003eExtend\u003c\/h3\u003e\n\u003cp data-start=\"16979\" data-end=\"17091\"\u003eDevelop further questions about air-quality monitoring, gas sensors, relay circuits and automatic alert systems.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1hhrn0b\" data-start=\"17098\" data-end=\"17120\"\u003eExplore Key Concepts\u003c\/h1\u003e\n\u003ch2 data-section-id=\"15st64t\" data-start=\"17122\" data-end=\"17146\"\u003eGas-Sensor Technology\u003c\/h2\u003e\n\u003cul data-start=\"17148\" data-end=\"17286\"\u003e\n\u003cli data-section-id=\"16mzneo\" data-start=\"17148\" data-end=\"17166\"\u003eMQ135 gas sensor\u003c\/li\u003e\n\u003cli data-section-id=\"1xevcnc\" data-start=\"17167\" data-end=\"17190\"\u003eSemiconductor sensing\u003c\/li\u003e\n\u003cli data-section-id=\"nv0nsh\" data-start=\"17191\" data-end=\"17220\"\u003eTin-dioxide sensing element\u003c\/li\u003e\n\u003cli data-section-id=\"12xd0h2\" data-start=\"17221\" data-end=\"17237\"\u003eSensor heating\u003c\/li\u003e\n\u003cli data-section-id=\"1nk0r5m\" data-start=\"17238\" data-end=\"17263\"\u003eGas and vapour response\u003c\/li\u003e\n\u003cli data-section-id=\"1mmgjw5\" data-start=\"17264\" data-end=\"17286\"\u003eEnvironmental inputs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1yc2o4n\" data-start=\"17288\" data-end=\"17310\"\u003eElectronic Circuits\u003c\/h2\u003e\n\u003cul data-start=\"17312\" data-end=\"17444\"\u003e\n\u003cli data-section-id=\"y1gkec\" data-start=\"17312\" data-end=\"17326\"\u003ePower supply\u003c\/li\u003e\n\u003cli data-section-id=\"1d81dvm\" data-start=\"17327\" data-end=\"17348\"\u003eComparator circuits\u003c\/li\u003e\n\u003cli data-section-id=\"105elkr\" data-start=\"17349\" data-end=\"17372\"\u003eAdjustable thresholds\u003c\/li\u003e\n\u003cli data-section-id=\"bkk33h\" data-start=\"17373\" data-end=\"17389\"\u003eDigital output\u003c\/li\u003e\n\u003cli data-section-id=\"1w7k2qi\" data-start=\"17390\" data-end=\"17419\"\u003eOpen and completed circuits\u003c\/li\u003e\n\u003cli data-section-id=\"rdmeni\" data-start=\"17420\" data-end=\"17444\"\u003eAudible output devices\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"3x7uvo\" data-start=\"17446\" data-end=\"17464\"\u003eRelay Switching\u003c\/h2\u003e\n\u003cul data-start=\"17466\" data-end=\"17614\"\u003e\n\u003cli data-section-id=\"1pl9xbe\" data-start=\"17466\" data-end=\"17489\"\u003eElectromagnetic coils\u003c\/li\u003e\n\u003cli data-section-id=\"x8hby0\" data-start=\"17490\" data-end=\"17506\"\u003eRelay contacts\u003c\/li\u003e\n\u003cli data-section-id=\"a5wq4o\" data-start=\"17507\" data-end=\"17532\"\u003eNormally Open switching\u003c\/li\u003e\n\u003cli data-section-id=\"1xdnvpt\" data-start=\"17533\" data-end=\"17561\"\u003eSignal-controlled circuits\u003c\/li\u003e\n\u003cli data-section-id=\"14788d2\" data-start=\"17562\" data-end=\"17582\"\u003eAutomatic response\u003c\/li\u003e\n\u003cli data-section-id=\"sbf7ld\" data-start=\"17583\" data-end=\"17614\"\u003eElectrical isolation concepts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"djhaj9\" data-start=\"17616\" data-end=\"17637\"\u003eCircuit Protection\u003c\/h2\u003e\n\u003cul data-start=\"17639\" data-end=\"17750\"\u003e\n\u003cli data-section-id=\"1nwhmwx\" data-start=\"17639\" data-end=\"17657\"\u003eBattery polarity\u003c\/li\u003e\n\u003cli data-section-id=\"1uas89k\" data-start=\"17658\" data-end=\"17666\"\u003eDiodes\u003c\/li\u003e\n\u003cli data-section-id=\"5snrea\" data-start=\"17667\" data-end=\"17697\"\u003eOne-directional current flow\u003c\/li\u003e\n\u003cli data-section-id=\"1oumn2a\" data-start=\"17698\" data-end=\"17727\"\u003eReverse-polarity protection\u003c\/li\u003e\n\u003cli data-section-id=\"u0mexw\" data-start=\"17728\" data-end=\"17750\"\u003eComponent protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"bhz16e\" data-start=\"17752\" data-end=\"17778\"\u003ePractical Investigation\u003c\/h2\u003e\n\u003cul data-start=\"17780\" data-end=\"17901\"\u003e\n\u003cli data-section-id=\"170dhjf\" data-start=\"17780\" data-end=\"17801\"\u003eWarm-up observation\u003c\/li\u003e\n\u003cli data-section-id=\"1x9w6t8\" data-start=\"17802\" data-end=\"17822\"\u003eThreshold response\u003c\/li\u003e\n\u003cli data-section-id=\"1at15ml\" data-start=\"17823\" data-end=\"17838\"\u003eRepeatability\u003c\/li\u003e\n\u003cli data-section-id=\"1w9t21q\" data-start=\"17839\" data-end=\"17854\"\u003eRecovery time\u003c\/li\u003e\n\u003cli data-section-id=\"sggcpd\" data-start=\"17855\" data-end=\"17883\"\u003eCause-and-effect reasoning\u003c\/li\u003e\n\u003cli data-section-id=\"z1z1u8\" data-start=\"17884\" data-end=\"17901\"\u003eTroubleshooting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1svsaj6\" data-start=\"17903\" data-end=\"17922\"\u003eSafety Awareness\u003c\/h2\u003e\n\u003cul data-start=\"17924\" data-end=\"18060\"\u003e\n\u003cli data-section-id=\"14nlxjr\" data-start=\"17924\" data-end=\"17945\"\u003eMonitoring concepts\u003c\/li\u003e\n\u003cli data-section-id=\"1ghn20e\" data-start=\"17946\" data-end=\"17963\"\u003eWarning outputs\u003c\/li\u003e\n\u003cli data-section-id=\"rk6lf6\" data-start=\"17964\" data-end=\"17987\"\u003eVentilation awareness\u003c\/li\u003e\n\u003cli data-section-id=\"tm978y\" data-start=\"17988\" data-end=\"18024\"\u003eResponsible demonstration practice\u003c\/li\u003e\n\u003cli data-section-id=\"1c5h29t\" data-start=\"18025\" data-end=\"18060\"\u003eLimitations of educational models\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-section-id=\"1yowdg0\" data-start=\"18067\" data-end=\"18107\"\u003eOne Model. Multiple Learning Outcomes.\u003c\/h1\u003e\n\u003cp data-start=\"18109\" data-end=\"18150\"\u003eThe model allows students to explore how:\u003c\/p\u003e\n\u003cul data-start=\"18152\" data-end=\"18655\"\u003e\n\u003cli data-section-id=\"dopjk0\" data-start=\"18152\" data-end=\"18210\"\u003eA semiconductor sensor responds to environmental changes\u003c\/li\u003e\n\u003cli data-section-id=\"1qv7zh9\" data-start=\"18211\" data-end=\"18265\"\u003eA comparator checks the response against a threshold\u003c\/li\u003e\n\u003cli data-section-id=\"zqkwnv\" data-start=\"18266\" data-end=\"18301\"\u003eA digital signal controls a relay\u003c\/li\u003e\n\u003cli data-section-id=\"nr2jfq\" data-start=\"18302\" data-end=\"18346\"\u003eA relay switches a separate output circuit\u003c\/li\u003e\n\u003cli data-section-id=\"10duj92\" data-start=\"18347\" data-end=\"18379\"\u003eA buzzer communicates an alert\u003c\/li\u003e\n\u003cli data-section-id=\"z63z3n\" data-start=\"18380\" data-end=\"18424\"\u003eA diode helps protect the power connection\u003c\/li\u003e\n\u003cli data-section-id=\"10un3b5\" data-start=\"18425\" data-end=\"18476\"\u003eA sensor system can reset after conditions change\u003c\/li\u003e\n\u003cli data-section-id=\"ns864i\" data-start=\"18477\" data-end=\"18528\"\u003eVisible and audible responses support observation\u003c\/li\u003e\n\u003cli data-section-id=\"65gyt9\" data-start=\"18529\" data-end=\"18586\"\u003eSeveral modules work together as one coordinated system\u003c\/li\u003e\n\u003cli data-section-id=\"14084hq\" data-start=\"18587\" data-end=\"18655\"\u003eElectronic sensing can be connected with safety-awareness concepts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-section-id=\"1hdonrc\" data-start=\"18662\" data-end=\"18697\"\u003eBuilt for Confident Demonstration\u003c\/h1\u003e\n\u003cp data-start=\"18699\" data-end=\"18812\"\u003eThe visible components, relay response, audible buzzer and guided learning resources make the model suitable for:\u003c\/p\u003e\n\u003cul data-start=\"18814\" data-end=\"19259\"\u003e\n\u003cli data-section-id=\"cas5ce\" data-start=\"18814\" data-end=\"18839\"\u003eSchool science projects\u003c\/li\u003e\n\u003cli data-section-id=\"kiq2zo\" data-start=\"18840\" data-end=\"18861\"\u003eScience exhibitions\u003c\/li\u003e\n\u003cli data-section-id=\"1e0u4lr\" data-start=\"18862\" data-end=\"18888\"\u003eClassroom demonstrations\u003c\/li\u003e\n\u003cli data-section-id=\"1h0c634\" data-start=\"18889\" data-end=\"18916\"\u003eGas-sensor demonstrations\u003c\/li\u003e\n\u003cli data-section-id=\"gkjo0y\" data-start=\"18917\" data-end=\"18949\"\u003eRelay-switching demonstrations\u003c\/li\u003e\n\u003cli data-section-id=\"a4ydys\" data-start=\"18950\" data-end=\"18988\"\u003eSemiconductor-electronics activities\u003c\/li\u003e\n\u003cli data-section-id=\"35lfp4\" data-start=\"18989\" data-end=\"19026\"\u003eHome-safety awareness presentations\u003c\/li\u003e\n\u003cli data-section-id=\"1fy9269\" data-start=\"19027\" data-end=\"19060\"\u003eAir-quality concept discussions\u003c\/li\u003e\n\u003cli data-section-id=\"iejdeo\" data-start=\"19061\" data-end=\"19090\"\u003eSensor-circuit explanations\u003c\/li\u003e\n\u003cli data-section-id=\"19fy33u\" data-start=\"19091\" data-end=\"19122\"\u003eThreshold-response activities\u003c\/li\u003e\n\u003cli data-section-id=\"1v9xwk3\" data-start=\"19123\" data-end=\"19138\"\u003eSTEM learning\u003c\/li\u003e\n\u003cli data-section-id=\"1nl6elw\" data-start=\"19139\" data-end=\"19162\"\u003eExperiential learning\u003c\/li\u003e\n\u003cli data-section-id=\"1o2e6vp\" data-start=\"19163\" data-end=\"19187\"\u003eProject-based learning\u003c\/li\u003e\n\u003cli data-section-id=\"4tplyf\" data-start=\"19188\" data-end=\"19216\"\u003eProject-report preparation\u003c\/li\u003e\n\u003cli data-section-id=\"1o8392l\" data-start=\"19217\" data-end=\"19245\"\u003eViva and oral presentation\u003c\/li\u003e\n\u003cli data-section-id=\"11hgo15\" data-start=\"19246\" data-end=\"19259\"\u003eGrades 7–12\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-section-id=\"14d3cd5\" data-start=\"19266\" data-end=\"19297\"\u003eSuggested Student Explanation\u003c\/h1\u003e\n\u003cblockquote data-start=\"19299\" data-end=\"19893\"\u003e\n\u003cp data-start=\"19301\" data-end=\"19893\"\u003e“This is an MQ135 gas-alert working model. The MQ135 sensor responds to changes in nearby gas or vapour conditions. Its comparator checks the sensor response against an adjustable threshold. When that threshold is crossed, the module sends a digital signal to the relay. The relay acts as an electrically controlled switch and completes the buzzer circuit. The buzzer then produces an audible alert. When the gas or vapour disperses, the relay releases and the buzzer stops. The model demonstrates semiconductor gas sensing, threshold comparison, relay switching and automatic alert systems.”\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch1 data-section-id=\"kts086\" data-start=\"19900\" data-end=\"19927\"\u003eBuild Upon the Foundation\u003c\/h1\u003e\n\u003cp data-start=\"19929\" data-end=\"20039\"\u003eOnce students understand the original gas-sensing and alert sequence, the model can inspire further questions:\u003c\/p\u003e\n\u003cul data-start=\"20041\" data-end=\"20674\"\u003e\n\u003cli data-section-id=\"1apkcdo\" data-start=\"20041\" data-end=\"20079\"\u003eCould an LED provide a visual alert?\u003c\/li\u003e\n\u003cli data-section-id=\"373cte\" data-start=\"20080\" data-end=\"20134\"\u003eCould a display show the sensor’s analogue response?\u003c\/li\u003e\n\u003cli data-section-id=\"y3a245\" data-start=\"20135\" data-end=\"20184\"\u003eCould different threshold settings be compared?\u003c\/li\u003e\n\u003cli data-section-id=\"1qez6aa\" data-start=\"20185\" data-end=\"20245\"\u003eCould the sensor output be connected to a microcontroller?\u003c\/li\u003e\n\u003cli data-section-id=\"1i9x022\" data-start=\"20246\" data-end=\"20292\"\u003eCould response events be recorded over time?\u003c\/li\u003e\n\u003cli data-section-id=\"12p8f57\" data-start=\"20293\" data-end=\"20333\"\u003eCould more than one sensor be studied?\u003c\/li\u003e\n\u003cli data-section-id=\"1cy59zc\" data-start=\"20334\" data-end=\"20380\"\u003eCould a ventilation-fan concept be explored?\u003c\/li\u003e\n\u003cli data-section-id=\"l7k4ct\" data-start=\"20381\" data-end=\"20430\"\u003eCould a wireless notification concept be added?\u003c\/li\u003e\n\u003cli data-section-id=\"42q4d1\" data-start=\"20431\" data-end=\"20491\"\u003eCould the project compare different environmental sensors?\u003c\/li\u003e\n\u003cli data-section-id=\"1fz8ib9\" data-start=\"20492\" data-end=\"20552\"\u003eCould the model be expanded into a smart-building display?\u003c\/li\u003e\n\u003cli data-section-id=\"139d8lj\" data-start=\"20553\" data-end=\"20622\"\u003eHow would a calibrated instrument differ from this threshold model?\u003c\/li\u003e\n\u003cli data-section-id=\"1u0isss\" data-start=\"20623\" data-end=\"20674\"\u003eWhy are real safety systems tested and certified?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"20676\" data-end=\"20811\"\u003eThese are further learning directions. Additional components, circuit modifications and appropriate technical guidance may be required.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1sdrx7j\" data-start=\"20818\" data-end=\"20860\"\u003eThis Concept Can Also Be Used to Explore\u003c\/h1\u003e\n\u003cp data-start=\"20862\" data-end=\"20946\"\u003eThe sensing, threshold, switching and alert sequence can support discussions around:\u003c\/p\u003e\n\u003cul data-start=\"20948\" data-end=\"21457\"\u003e\n\u003cli data-section-id=\"14cm9is\" data-start=\"20948\" data-end=\"20977\"\u003eGas-presence alert concepts\u003c\/li\u003e\n\u003cli data-section-id=\"wv4kfh\" data-start=\"20978\" data-end=\"21011\"\u003eAir-quality monitoring concepts\u003c\/li\u003e\n\u003cli data-section-id=\"4zvlv3\" data-start=\"21012\" data-end=\"21043\"\u003eSmoke-response demonstrations\u003c\/li\u003e\n\u003cli data-section-id=\"iy4rlz\" data-start=\"21044\" data-end=\"21080\"\u003eIndustrial air-monitoring concepts\u003c\/li\u003e\n\u003cli data-section-id=\"3awg6o\" data-start=\"21081\" data-end=\"21117\"\u003eLaboratory vapour-warning concepts\u003c\/li\u003e\n\u003cli data-section-id=\"14boga\" data-start=\"21118\" data-end=\"21149\"\u003eSmart-building sensor systems\u003c\/li\u003e\n\u003cli data-section-id=\"amdytc\" data-start=\"21150\" data-end=\"21180\"\u003eVentilation-control concepts\u003c\/li\u003e\n\u003cli data-section-id=\"190wk4j\" data-start=\"21181\" data-end=\"21213\"\u003eSensor-controlled fan concepts\u003c\/li\u003e\n\u003cli data-section-id=\"1m89z0c\" data-start=\"21214\" data-end=\"21240\"\u003eEnvironmental monitoring\u003c\/li\u003e\n\u003cli data-section-id=\"1ge0qdl\" data-start=\"21241\" data-end=\"21275\"\u003eThreshold-based warning circuits\u003c\/li\u003e\n\u003cli data-section-id=\"6mlou7\" data-start=\"21276\" data-end=\"21306\"\u003eRelay-operated alarm systems\u003c\/li\u003e\n\u003cli data-section-id=\"g6lbem\" data-start=\"21307\" data-end=\"21338\"\u003eSemiconductor-sensor projects\u003c\/li\u003e\n\u003cli data-section-id=\"1ocjw3v\" data-start=\"21339\" data-end=\"21372\"\u003eAutomatic notification concepts\u003c\/li\u003e\n\u003cli data-section-id=\"1xpfm8\" data-start=\"21373\" data-end=\"21402\"\u003eMulti-sensor safety systems\u003c\/li\u003e\n\u003cli data-section-id=\"1k5z7ks\" data-start=\"21403\" data-end=\"21433\"\u003eInput-process-output systems\u003c\/li\u003e\n\u003cli data-section-id=\"47byvp\" data-start=\"21434\" data-end=\"21457\"\u003eElectronic automation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"21459\" data-end=\"21623\"\u003eThese are \u003cstrong data-start=\"21469\" data-end=\"21503\"\u003eeducational concept extensions\u003c\/strong\u003e based on the model’s functional sequence. They are not additional built-in features or claims of real-world protection\u003c\/p\u003e\n\u003ch1 data-section-id=\"fv0nqt\" data-start=\"24004\" data-end=\"24040\"\u003eCurriculum and Concept Connections\u003c\/h1\u003e\n\u003cp data-start=\"24042\" data-end=\"24094\"\u003eThe project can support classroom discussion around:\u003c\/p\u003e\n\u003cul data-start=\"24096\" data-end=\"24352\"\u003e\n\u003cli data-section-id=\"1y3t1d2\" data-start=\"24096\" data-end=\"24117\"\u003eElectrical circuits\u003c\/li\u003e\n\u003cli data-section-id=\"110svch\" data-start=\"24118\" data-end=\"24156\"\u003eMagnetic effects of electric current\u003c\/li\u003e\n\u003cli data-section-id=\"15wvi06\" data-start=\"24157\" data-end=\"24190\"\u003eElectromagnetic relay operation\u003c\/li\u003e\n\u003cli data-section-id=\"1rwweky\" data-start=\"24191\" data-end=\"24218\"\u003eSemiconductor electronics\u003c\/li\u003e\n\u003cli data-section-id=\"1ipzomz\" data-start=\"24219\" data-end=\"24244\"\u003eEnvironmental awareness\u003c\/li\u003e\n\u003cli data-section-id=\"7izk69\" data-start=\"24245\" data-end=\"24267\"\u003eAir-quality concepts\u003c\/li\u003e\n\u003cli data-section-id=\"1cj7c3c\" data-start=\"24268\" data-end=\"24287\"\u003eSensor technology\u003c\/li\u003e\n\u003cli data-section-id=\"1jo3rex\" data-start=\"24288\" data-end=\"24315\"\u003eAutomatic warning systems\u003c\/li\u003e\n\u003cli data-section-id=\"12gpd19\" data-start=\"24316\" data-end=\"24352\"\u003eInput-process-output relationships\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"24354\" data-end=\"24671\"\u003eThe supplied concept-mapping document connects the model with selected electricity, electromagnetism, environment and semiconductor concepts for Grades 7–12. These are independent educational references and do not imply approval or endorsement by NCERT, CBSE or any school board.\u003c\/p\u003e\n\u003ch1 data-section-id=\"158v5je\" data-start=\"24678\" data-end=\"24707\"\u003eA Complete Learning Journey\u003c\/h1\u003e\n\u003ch2 data-section-id=\"4j6q80\" data-start=\"24709\" data-end=\"24728\"\u003eScan the code.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1ns05dq\" data-start=\"24729\" data-end=\"24758\"\u003eWatch the demonstration.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1sl89mi\" data-start=\"24759\" data-end=\"24780\"\u003eRead the manual.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"bebe8y\" data-start=\"24781\" data-end=\"24802\"\u003ePower the model.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"6xham0\" data-start=\"24803\" data-end=\"24838\"\u003eAllow the sensor to stabilise.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1rvn1bf\" data-start=\"24839\" data-end=\"24865\"\u003eObserve the response.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"peke1p\" data-start=\"24866\" data-end=\"24889\"\u003eFollow the signal.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"i5h6jh\" data-start=\"24890\" data-end=\"24917\"\u003eHear the relay switch.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"16pk3bi\" data-start=\"24918\" data-end=\"24943\"\u003eListen to the alert.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"cxp7xy\" data-start=\"24944\" data-end=\"24967\"\u003eRecord the result.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1ixk6pc\" data-start=\"24968\" data-end=\"24992\"\u003eExplain the system.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1e6rqbt\" data-start=\"24993\" data-end=\"25016\"\u003eBuild upon the idea.\u003c\/h2\u003e\n\u003cp data-start=\"25018\" data-end=\"25236\"\u003eThe \u003cstrong data-start=\"25022\" data-end=\"25058\"\u003eGo Science MQ135 Gas Alert Alarm\u003c\/strong\u003e transforms semiconductor sensing, threshold comparison and relay-controlled alerts into a guided working experience students can observe, understand and confidently demonstrate.\u003c\/p\u003e\n\u003ch1 data-section-id=\"4osgbg\" data-start=\"25243\" data-end=\"25289\"\u003eImportant Educational and Safety Information\u003c\/h1\u003e\n\u003cp data-start=\"25291\" data-end=\"25367\"\u003eThis product is an educational demonstration model and science teaching aid.\u003c\/p\u003e\n\u003cul data-start=\"25369\" data-end=\"26447\"\u003e\n\u003cli data-section-id=\"akhqat\" data-start=\"25369\" data-end=\"25439\"\u003eAdult or teacher supervision is mandatory for the gas demonstration.\u003c\/li\u003e\n\u003cli data-section-id=\"svg5rl\" data-start=\"25440\" data-end=\"25487\"\u003eUse the model only in a well-ventilated area.\u003c\/li\u003e\n\u003cli data-section-id=\"1a83olo\" data-start=\"25488\" data-end=\"25551\"\u003eKeep the demonstration area completely free from open flames.\u003c\/li\u003e\n\u003cli data-section-id=\"w00ip2\" data-start=\"25552\" data-end=\"25614\"\u003eKeep away from sparks, hot surfaces and flammable materials.\u003c\/li\u003e\n\u003cli data-section-id=\"1nm90wr\" data-start=\"25615\" data-end=\"25667\"\u003eNever ignite the lighter during the demonstration.\u003c\/li\u003e\n\u003cli data-section-id=\"1ios4wi\" data-start=\"25668\" data-end=\"25733\"\u003eRelease only the minimum brief amount required for observation.\u003c\/li\u003e\n\u003cli data-section-id=\"1yn772o\" data-start=\"25734\" data-end=\"25785\"\u003eNever continuously discharge gas onto the sensor.\u003c\/li\u003e\n\u003cli data-section-id=\"jepp30\" data-start=\"25786\" data-end=\"25841\"\u003eDo not inhale gas or place the lighter near the face.\u003c\/li\u003e\n\u003cli data-section-id=\"rqtjqa\" data-start=\"25842\" data-end=\"25907\"\u003eAllow the sensor a brief warm-up period after power connection.\u003c\/li\u003e\n\u003cli data-section-id=\"1d37zlf\" data-start=\"25908\" data-end=\"25954\"\u003eDo not leave the model powered continuously.\u003c\/li\u003e\n\u003cli data-section-id=\"1tyop42\" data-start=\"25955\" data-end=\"26000\"\u003eKeep the relay and buzzer activation brief.\u003c\/li\u003e\n\u003cli data-section-id=\"re2v84\" data-start=\"26001\" data-end=\"26056\"\u003eConnect the 9V battery using the correct orientation.\u003c\/li\u003e\n\u003cli data-section-id=\"73rvoq\" data-start=\"26057\" data-end=\"26120\"\u003eDisconnect the battery immediately after every demonstration.\u003c\/li\u003e\n\u003cli data-section-id=\"glgxzf\" data-start=\"26121\" data-end=\"26178\"\u003eStore the model in a cool, dry and ventilated location.\u003c\/li\u003e\n\u003cli data-section-id=\"1r0fiof\" data-start=\"26179\" data-end=\"26258\"\u003eKeep the sensor away from prolonged exposure to fumes, solvents and moisture.\u003c\/li\u003e\n\u003cli data-section-id=\"114txdz\" data-start=\"26259\" data-end=\"26321\"\u003eInternet access is required for the online manual and video.\u003c\/li\u003e\n\u003cli data-section-id=\"175od2k\" data-start=\"26322\" data-end=\"26447\"\u003eProduct appearance, wire routing and component placement may vary slightly due to manufacturing and component availability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"6f2uf4\" data-start=\"26449\" data-end=\"26480\"\u003eImportant Product Limitation\u003c\/h2\u003e\n\u003cp data-start=\"26482\" data-end=\"26554\"\u003eThis product demonstrates a general threshold-based gas-sensor response.\u003c\/p\u003e\n\u003cp data-start=\"26556\" data-end=\"26566\"\u003eIt is not:\u003c\/p\u003e\n\u003cul data-start=\"26568\" data-end=\"26900\"\u003e\n\u003cli data-section-id=\"uhtm5r\" data-start=\"26568\" data-end=\"26599\"\u003eA certified gas-leak detector\u003c\/li\u003e\n\u003cli data-section-id=\"1y7x4i7\" data-start=\"26600\" data-end=\"26626\"\u003eA certified LPG detector\u003c\/li\u003e\n\u003cli data-section-id=\"c8yy79\" data-start=\"26627\" data-end=\"26642\"\u003eA smoke alarm\u003c\/li\u003e\n\u003cli data-section-id=\"jaojvi\" data-start=\"26643\" data-end=\"26671\"\u003eA carbon-monoxide detector\u003c\/li\u003e\n\u003cli data-section-id=\"6ge9rh\" data-start=\"26672\" data-end=\"26711\"\u003eA carbon-dioxide measuring instrument\u003c\/li\u003e\n\u003cli data-section-id=\"pk7b0y\" data-start=\"26712\" data-end=\"26728\"\u003eAn AQI monitor\u003c\/li\u003e\n\u003cli data-section-id=\"1ep3be0\" data-start=\"26729\" data-end=\"26767\"\u003eA calibrated gas-concentration meter\u003c\/li\u003e\n\u003cli data-section-id=\"1rnkouu\" data-start=\"26768\" data-end=\"26793\"\u003eA home-security product\u003c\/li\u003e\n\u003cli data-section-id=\"1euwn8s\" data-start=\"26794\" data-end=\"26823\"\u003eAn emergency-warning system\u003c\/li\u003e\n\u003cli data-section-id=\"1yy9shy\" data-start=\"26824\" data-end=\"26846\"\u003eA life-safety device\u003c\/li\u003e\n\u003cli data-section-id=\"12spkvq\" data-start=\"26847\" data-end=\"26900\"\u003eA replacement for certified gas-detection equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"26902\" data-end=\"27061\"\u003eIt must never be relied upon to protect people, animals, buildings or property.\u003c\/p\u003e\n\u003cp data-start=\"26902\" data-end=\"27061\"\u003e\u003cstrong data-start=\"29508\" data-end=\"29545\"\u003eReturn, Refund \u0026amp; Exchange Notice:\u003c\/strong\u003e This educational working model contains tested and sensitive electronic components. Kits that have been opened, powered, activated, tested, used, altered or exposed to gas, vapour, smoke, moisture or unsuitable operating conditions are not eligible for return, refund or exchange . Battery and demonstration lighter are not included. Please review the product description, included contents, dimensions, power requirement, demonstration video and safety instructions carefully before purchase.\u003c\/p\u003e","brand":"Go Science","offers":[{"title":"Default Title","offer_id":45648151478319,"sku":"2671814292805","price":649.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/4442\/3471\/files\/Go_Science_Classroom_Series_Gas_Alert_Alarm_MQ135_Gas_Sensor_School_Project_Demonstration_Kit_image_with_retail_packing.jpg?v=1784641476"},{"product_id":"obstacle-detection-alarm-school-project-using-ir-sensor","title":"Obstacle Detection School Project \u0026 Demonstration kit Using IR Sensor Go Science Classroom Series","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\" data-end=\"44\" data-start=\"0\" data-section-id=\"wo2xyo\"\u003eObstacle Detection Alarm School project \u0026amp; Demonstration kit Using IR Sensor Go Science Classroom Series\u003cspan class=\"PDq2pG_selectionAnchor\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003ch2 data-end=\"114\" data-start=\"45\" data-section-id=\"9qhe78\"\u003eSmart Vehicle Collision Warning School Project \u0026amp; Demonstration Kit\u003c\/h2\u003e\n\u003ch3 data-end=\"157\" data-start=\"116\" data-section-id=\"1d7uqn8\"\u003eSee invisible light become a warning.\u003c\/h3\u003e\n\u003cp data-end=\"268\" data-start=\"159\"\u003eTurn infrared sensing, electronic comparison and relay switching into a live road-safety learning experience.\u003c\/p\u003e\n\u003cp data-end=\"268\" data-start=\"159\"\u003e\u003ciframe width=\"1012\" height=\"569\" src=\"https:\/\/www.youtube.com\/embed\/H-kZ37HFoqw\" title=\"\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp data-end=\"496\" data-start=\"270\"\u003eThe \u003cstrong data-end=\"330\" data-start=\"274\"\u003eGo Science Classroom Series Obstacle Detection Alarm\u003c\/strong\u003e brings an IR obstacle sensor, adjustable comparator circuit, 5V relay module, active buzzer and protection diode together on one complete pre-wired working platform.\u003c\/p\u003e\n\u003cp data-end=\"860\" data-start=\"498\"\u003eAs the included toy vehicle moves towards the sensor, invisible infrared light is directed forward and reflected from the approaching object. The sensor receives the reflected light and checks the response against its selected threshold. When the obstacle enters the detection zone, the relay activates and the buzzer produces an audible collision-warning alert.\u003c\/p\u003e\n\u003cp data-end=\"915\" data-start=\"862\"\u003eStudents can follow the complete functional sequence:\u003c\/p\u003e\n\u003cp data-end=\"998\" data-start=\"917\"\u003e\u003cstrong data-end=\"998\" data-start=\"917\"\u003eVehicle Approaches → IR Reflection Detected → Relay Switches → Warning Sounds\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"1200\" data-start=\"1000\"\u003eThe model provides a clear foundation for exploring infrared sensing, reflected light, proximity detection, electronic thresholds, relay switching, warning systems and road-safety technology concepts.\u003c\/p\u003e\n\u003cp data-end=\"1452\" data-start=\"1202\"\u003eDesigned for \u003cstrong data-end=\"1230\" data-start=\"1215\"\u003eGrades 7–12\u003c\/strong\u003e, it is suitable for school projects, science exhibitions, classroom demonstrations, electronics activities and road-safety concept presentations.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1hjr29d\" data-start=\"22015\" data-end=\"22035\"\u003eWhat’s in the Kit?\u003c\/h1\u003e\n\u003cul data-start=\"22037\" data-end=\"22760\"\u003e\n\u003cli data-section-id=\"11l4mfz\" data-start=\"22037\" data-end=\"22078\"\u003ePre-assembled IR obstacle-sensor module\u003c\/li\u003e\n\u003cli data-section-id=\"u62o12\" data-start=\"22079\" data-end=\"22110\"\u003eAdjustable comparator circuit\u003c\/li\u003e\n\u003cli data-section-id=\"1xxec4y\" data-start=\"22111\" data-end=\"22128\"\u003e5V relay module\u003c\/li\u003e\n\u003cli data-section-id=\"ll2rnn\" data-start=\"22129\" data-end=\"22154\"\u003ePre-wired active buzzer\u003c\/li\u003e\n\u003cli data-section-id=\"pyfo9t\" data-start=\"22155\" data-end=\"22180\"\u003eInline protection diode\u003c\/li\u003e\n\u003cli data-section-id=\"udqapu\" data-start=\"22181\" data-end=\"22207\"\u003ePrinted road-layout base\u003c\/li\u003e\n\u003cli data-section-id=\"kesgu7\" data-start=\"22208\" data-end=\"22247\"\u003eToy car model with sensor arrangement\u003c\/li\u003e\n\u003cli data-section-id=\"ich6ki\" data-start=\"22248\" data-end=\"22277\"\u003eToy truck or obstacle model\u003c\/li\u003e\n\u003cli data-section-id=\"1dkujop\" data-start=\"22278\" data-end=\"22310\"\u003ePre-connected electrical wires\u003c\/li\u003e\n\u003cli data-section-id=\"myf71m\" data-start=\"22311\" data-end=\"22335\"\u003eBattery snap connector\u003c\/li\u003e\n\u003cli data-section-id=\"st90l0\" data-start=\"22336\" data-end=\"22368\"\u003eWooden component-support block\u003c\/li\u003e\n\u003cli data-section-id=\"19u4i7m\" data-start=\"22369\" data-end=\"22409\"\u003eReady-to-use educational working model\u003c\/li\u003e\n\u003cli data-section-id=\"1a44xy5\" data-start=\"22410\" data-end=\"22452\"\u003eQR access to the detailed digital manual\u003c\/li\u003e\n\u003cli data-section-id=\"1xp8vqn\" data-start=\"22453\" data-end=\"22510\"\u003eDetailed 16-page full-colour digital instruction manual\u003c\/li\u003e\n\u003cli data-section-id=\"1gzewut\" data-start=\"22511\" data-end=\"22566\"\u003eQR access to the video demonstration from the kit box\u003c\/li\u003e\n\u003cli data-section-id=\"1nwy0n7\" data-start=\"22567\" data-end=\"22595\"\u003eStep-by-step working video\u003c\/li\u003e\n\u003cli data-section-id=\"1qrzs62\" data-start=\"22596\" data-end=\"22632\"\u003eIllustrated component explanations\u003c\/li\u003e\n\u003cli data-section-id=\"1skhet7\" data-start=\"22633\" data-end=\"22671\"\u003eTesting and troubleshooting guidance\u003c\/li\u003e\n\u003cli data-section-id=\"102qxlx\" data-start=\"22672\" data-end=\"22710\"\u003eEducational-use and storage guidance\u003c\/li\u003e\n\u003cli data-section-id=\"3jflu\" data-start=\"22711\" data-end=\"22731\"\u003eConcept checkpoint\u003c\/li\u003e\n\u003cli data-section-id=\"1jejhsj\" data-start=\"22732\" data-end=\"22760\"\u003eCertificate of Achievement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"22762\" data-end=\"22980\"\u003eThe packaging and manual identify the IR sensor, relay, diode, buzzer, road base, toy car, toy truck and battery connector as part of the kit.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1rc8kfz\" data-start=\"22987\" data-end=\"23008\"\u003eRequired Separately\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1kc5asn\" data-start=\"23010\" data-end=\"23023\"\u003e9V Battery\u003c\/h2\u003e\n\u003cp data-start=\"23025\" data-end=\"23065\"\u003eThe model requires one fresh 9V battery.\u003c\/p\u003e\n\u003cp data-start=\"23067\" data-end=\"23095\"\u003e\u003cstrong data-start=\"23067\" data-end=\"23095\"\u003eBattery is not included.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"23097\" data-end=\"23210\"\u003eNo separate demonstration material is required; the toy car and toy obstacle vehicle are supplied with the model.\u003c\/p\u003e\n\u003ch1 data-section-id=\"nh62sj\" data-start=\"23217\" data-end=\"23241\"\u003eProduct Specifications\u003c\/h1\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"23243\" data-end=\"24203\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"23243\" data-end=\"23270\"\u003e\n\u003ctr data-start=\"23243\" data-end=\"23270\"\u003e\n\u003cth data-start=\"23243\" data-end=\"23259\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"23259\" data-end=\"23270\" data-col-size=\"md\" class=\"last:pe-10\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"23281\" data-end=\"24203\"\u003e\n\u003ctr data-start=\"23281\" data-end=\"23344\"\u003e\n\u003ctd data-start=\"23281\" data-end=\"23296\" data-col-size=\"sm\"\u003eProduct type\u003c\/td\u003e\n\u003ctd data-start=\"23296\" data-end=\"23344\" data-col-size=\"md\"\u003eEducational obstacle-detection working model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23345\" data-end=\"23381\"\u003e\n\u003ctd data-start=\"23345\" data-end=\"23366\" data-col-size=\"sm\"\u003eRecommended grades\u003c\/td\u003e\n\u003ctd data-start=\"23366\" data-end=\"23381\" data-col-size=\"md\"\u003eGrades 7–12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23382\" data-end=\"23439\"\u003e\n\u003ctd data-start=\"23382\" data-end=\"23399\" data-col-size=\"sm\"\u003ePrimary sensor\u003c\/td\u003e\n\u003ctd data-start=\"23399\" data-end=\"23439\" data-col-size=\"md\"\u003eReflective IR obstacle-sensor module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23440\" data-end=\"23503\"\u003e\n\u003ctd data-start=\"23440\" data-end=\"23467\" data-col-size=\"sm\"\u003eSensor operating concept\u003c\/td\u003e\n\u003ctd data-start=\"23467\" data-end=\"23503\" data-col-size=\"md\"\u003eInfrared emission and reflection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23504\" data-end=\"23557\"\u003e\n\u003ctd data-start=\"23504\" data-end=\"23524\" data-col-size=\"sm\"\u003eThreshold control\u003c\/td\u003e\n\u003ctd data-start=\"23524\" data-end=\"23557\" data-col-size=\"md\"\u003eAdjustable onboard comparator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23558\" data-end=\"23599\"\u003e\n\u003ctd data-start=\"23558\" data-end=\"23580\" data-col-size=\"sm\"\u003eSwitching component\u003c\/td\u003e\n\u003ctd data-start=\"23580\" data-end=\"23599\" data-col-size=\"md\"\u003e5V relay module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23600\" data-end=\"23634\"\u003e\n\u003ctd data-start=\"23600\" data-end=\"23609\" data-col-size=\"sm\"\u003eOutput\u003c\/td\u003e\n\u003ctd data-start=\"23609\" data-end=\"23634\" data-col-size=\"md\"\u003eActive audible buzzer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23635\" data-end=\"23689\"\u003e\n\u003ctd data-start=\"23635\" data-end=\"23656\" data-col-size=\"sm\"\u003eCircuit protection\u003c\/td\u003e\n\u003ctd data-start=\"23656\" data-end=\"23689\" data-col-size=\"md\"\u003eInline reverse-polarity diode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23690\" data-end=\"23747\"\u003e\n\u003ctd data-start=\"23690\" data-end=\"23713\" data-col-size=\"sm\"\u003eDemonstration models\u003c\/td\u003e\n\u003ctd data-start=\"23713\" data-end=\"23747\" data-col-size=\"md\"\u003eToy car and toy truck\/obstacle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23748\" data-end=\"23789\"\u003e\n\u003ctd data-start=\"23748\" data-end=\"23762\" data-col-size=\"sm\"\u003eRoad layout\u003c\/td\u003e\n\u003ctd data-start=\"23762\" data-end=\"23789\" data-col-size=\"md\"\u003ePrinted model road base\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23790\" data-end=\"23825\"\u003e\n\u003ctd data-start=\"23790\" data-end=\"23819\" data-col-size=\"sm\"\u003eExact distance measurement\u003c\/td\u003e\n\u003ctd data-start=\"23819\" data-end=\"23825\" data-col-size=\"md\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23826\" data-end=\"23864\"\u003e\n\u003ctd data-start=\"23826\" data-end=\"23858\" data-col-size=\"sm\"\u003eAutomatic braking or steering\u003c\/td\u003e\n\u003ctd data-start=\"23858\" data-end=\"23864\" data-col-size=\"md\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23865\" data-end=\"23927\"\u003e\n\u003ctd data-start=\"23865\" data-end=\"23893\" data-col-size=\"sm\"\u003eCoding or microcontroller\u003c\/td\u003e\n\u003ctd data-start=\"23893\" data-end=\"23927\" data-col-size=\"md\"\u003eNot used in the supplied model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23928\" data-end=\"23965\"\u003e\n\u003ctd data-start=\"23928\" data-end=\"23947\" data-col-size=\"sm\"\u003eBattery required\u003c\/td\u003e\n\u003ctd data-start=\"23947\" data-end=\"23965\" data-col-size=\"md\"\u003eOne 9V battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23966\" data-end=\"23991\"\u003e\n\u003ctd data-start=\"23966\" data-end=\"23985\" data-col-size=\"sm\"\u003eBattery included\u003c\/td\u003e\n\u003ctd data-start=\"23985\" data-end=\"23991\" data-col-size=\"md\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23992\" data-end=\"24039\"\u003e\n\u003ctd data-start=\"23992\" data-end=\"24009\" data-col-size=\"sm\"\u003eDigital manual\u003c\/td\u003e\n\u003ctd data-start=\"24009\" data-end=\"24039\" data-col-size=\"md\"\u003eIncluded through QR access\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"24040\" data-end=\"24101\"\u003e\n\u003ctd data-start=\"24040\" data-end=\"24062\" data-col-size=\"sm\"\u003eVideo demonstration\u003c\/td\u003e\n\u003ctd data-start=\"24062\" data-end=\"24101\" data-col-size=\"md\"\u003eProduct gallery, YouTube and box QR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"24102\" data-end=\"24147\"\u003e\n\u003ctd data-start=\"24102\" data-end=\"24127\" data-col-size=\"sm\"\u003eApproximate dimensions\u003c\/td\u003e\n\u003ctd data-start=\"24127\" data-end=\"24147\" data-col-size=\"md\"\u003e26 × 11 × 6.5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"24148\" data-end=\"24203\"\u003e\n\u003ctd data-start=\"24148\" data-end=\"24163\" data-col-size=\"sm\"\u003eIntended use\u003c\/td\u003e\n\u003ctd data-start=\"24163\" data-end=\"24203\" data-col-size=\"md\"\u003eSupervised educational demonstration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"24205\" data-end=\"24339\"\u003eProduct colours, toy-vehicle styles, component placement and wire routing may vary according to production and component availability.\u003c\/p\u003e\n\u003ch1 data-end=\"1498\" data-start=\"1459\" data-section-id=\"cdsp2y\"\u003eA Complete Guided Learning Experience\u003c\/h1\u003e\n\u003ch2 data-end=\"1575\" data-start=\"1500\" data-section-id=\"1ck03rv\"\u003eWorking model, illustrated manual and video demonstration—all connected.\u003c\/h2\u003e\n\u003cp data-end=\"1740\" data-start=\"1577\"\u003eEvery Go Science Classroom Series kit is supported by a guided learning experience that helps students understand, observe, test and confidently explain the model.\u003c\/p\u003e\n\u003cp data-end=\"1770\" data-start=\"1742\"\u003eThis kit includes access to:\u003c\/p\u003e\n\u003cul data-end=\"2099\" data-start=\"1772\"\u003e\n\u003cli data-end=\"1823\" data-start=\"1772\" data-section-id=\"12k1qd3\"\u003eA detailed full-colour digital instruction manual\u003c\/li\u003e\n\u003cli data-end=\"1860\" data-start=\"1824\" data-section-id=\"1qrzs62\"\u003eIllustrated component explanations\u003c\/li\u003e\n\u003cli data-end=\"1898\" data-start=\"1861\" data-section-id=\"1upmqzk\"\u003eStep-by-step demonstration guidance\u003c\/li\u003e\n\u003cli data-end=\"1940\" data-start=\"1899\" data-section-id=\"1j0us4n\"\u003eA dedicated working video demonstration\u003c\/li\u003e\n\u003cli data-end=\"1982\" data-start=\"1941\" data-section-id=\"1p0ig0z\"\u003eQR access to digital learning resources\u003c\/li\u003e\n\u003cli data-end=\"2024\" data-start=\"1983\" data-section-id=\"zptwl2\"\u003eObservation and troubleshooting support\u003c\/li\u003e\n\u003cli data-end=\"2054\" data-start=\"2025\" data-section-id=\"1rcsa7k\"\u003eSafety and storage guidance\u003c\/li\u003e\n\u003cli data-end=\"2070\" data-start=\"2055\" data-section-id=\"1rf3i7h\"\u003eConcept recap\u003c\/li\u003e\n\u003cli data-end=\"2099\" data-start=\"2071\" data-section-id=\"1jejhsj\"\u003eCertificate of Achievement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"2159\" data-start=\"2101\"\u003eThe learning journey is designed to take students through:\u003c\/p\u003e\n\u003cp data-end=\"2241\" data-start=\"2161\"\u003e\u003cstrong data-end=\"2241\" data-start=\"2161\"\u003eExplore → Understand → Watch → Prepare → Test → Observe → Explain → Complete\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"2450\" data-start=\"2243\"\u003eStudents can study the working principle through the manual, watch the physical model in action and then use both resources while preparing for a classroom presentation, school project or science exhibition.\u003c\/p\u003e\n\u003ch1 data-end=\"2503\" data-start=\"2457\" data-section-id=\"uc35dk\"\u003eDetailed Full-Colour Digital Manual Included\u003c\/h1\u003e\n\u003ch2 data-end=\"2552\" data-start=\"2505\" data-section-id=\"1tkyk09\"\u003eScan, learn and demonstrate with confidence.\u003c\/h2\u003e\n\u003cp data-end=\"2717\" data-start=\"2554\"\u003eA QR code supplied with the kit provides access to a dedicated digital instruction and learning manual created specifically for the Obstacle Detection Alarm model.\u003c\/p\u003e\n\u003cp data-end=\"2801\" data-start=\"2719\"\u003eStudents can open the manual on a phone, tablet or computer and revisit it during:\u003c\/p\u003e\n\u003cul data-end=\"3015\" data-start=\"2803\"\u003e\n\u003cli data-end=\"2824\" data-start=\"2803\" data-section-id=\"xwutus\"\u003eProject preparation\u003c\/li\u003e\n\u003cli data-end=\"2851\" data-start=\"2825\" data-section-id=\"8wns25\"\u003eComponent identification\u003c\/li\u003e\n\u003cli data-end=\"2872\" data-start=\"2852\" data-section-id=\"12uzkgd\"\u003eClassroom learning\u003c\/li\u003e\n\u003cli data-end=\"2894\" data-start=\"2873\" data-section-id=\"12y2z1m\"\u003eDemonstration setup\u003c\/li\u003e\n\u003cli data-end=\"2924\" data-start=\"2895\" data-section-id=\"1bnwkld\"\u003eScience-exhibition practice\u003c\/li\u003e\n\u003cli data-end=\"2949\" data-start=\"2925\" data-section-id=\"1vdr806\"\u003eProject-report writing\u003c\/li\u003e\n\u003cli data-end=\"2968\" data-start=\"2950\" data-section-id=\"15rfreh\"\u003eViva preparation\u003c\/li\u003e\n\u003cli data-end=\"2986\" data-start=\"2969\" data-section-id=\"z1z1u8\"\u003eTroubleshooting\u003c\/li\u003e\n\u003cli data-end=\"3015\" data-start=\"2987\" data-section-id=\"1j1lfo5\"\u003eRevision and concept recap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"3118\" data-start=\"3017\"\u003eThe current manual contains \u003cstrong data-end=\"3079\" data-start=\"3045\"\u003e16 colourful illustrated pages\u003c\/strong\u003e covering the complete project journey.\u003c\/p\u003e\n\u003cp data-end=\"3132\" data-start=\"3120\"\u003eIt includes:\u003c\/p\u003e\n\u003cul data-end=\"3566\" data-start=\"3134\"\u003e\n\u003cli data-end=\"3182\" data-start=\"3134\" data-section-id=\"1h3u7eh\"\u003eA visual introduction to the road-safety model\u003c\/li\u003e\n\u003cli data-end=\"3223\" data-start=\"3183\" data-section-id=\"8kwack\"\u003eA complete guide to the included parts\u003c\/li\u003e\n\u003cli data-end=\"3268\" data-start=\"3224\" data-section-id=\"1i4iu2b\"\u003eIR sensor and reflected-light explanations\u003c\/li\u003e\n\u003cli data-end=\"3314\" data-start=\"3269\" data-section-id=\"ebgiaa\"\u003eRelay, buzzer and protection-diode concepts\u003c\/li\u003e\n\u003cli data-end=\"3356\" data-start=\"3315\" data-section-id=\"ud2ks3\"\u003eThe complete obstacle-to-alert sequence\u003c\/li\u003e\n\u003cli data-end=\"3401\" data-start=\"3357\" data-section-id=\"13xz5r8\"\u003eIllustrated setup and testing instructions\u003c\/li\u003e\n\u003cli data-end=\"3444\" data-start=\"3402\" data-section-id=\"78wi33\"\u003eObservation and troubleshooting guidance\u003c\/li\u003e\n\u003cli data-end=\"3476\" data-start=\"3445\" data-section-id=\"1ulkd50\"\u003eStorage and care instructions\u003c\/li\u003e\n\u003cli data-end=\"3506\" data-start=\"3477\" data-section-id=\"15yuguy\"\u003eEducational-use limitations\u003c\/li\u003e\n\u003cli data-end=\"3527\" data-start=\"3507\" data-section-id=\"3jflu\"\u003eConcept checkpoint\u003c\/li\u003e\n\u003cli data-end=\"3566\" data-start=\"3528\" data-section-id=\"1h10354\"\u003ePrintable Certificate of Achievement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"3892\" data-start=\"3568\"\u003eThe component guide appears on pages 5–6, the complete “invisible chain reaction” on page 7, illustrated setup and testing on pages 8–10, troubleshooting on page 11, storage and educational-use guidance on page 12, concept recap on page 13 and the Certificate of Achievement on page 15.\u003c\/p\u003e\n\u003ch1 data-end=\"3942\" data-start=\"3899\" data-section-id=\"19mroy9\"\u003eStep-by-Step Video Demonstration Included\u003c\/h1\u003e\n\u003ch2 data-end=\"3998\" data-start=\"3944\" data-section-id=\"1v1ehjk\"\u003eWatch the actual model before running the activity.\u003c\/h2\u003e\n\u003cp data-end=\"4136\" data-start=\"4000\"\u003eEvery kit also includes access to a dedicated video demonstration showing the physical product, its components and its working sequence.\u003c\/p\u003e\n\u003cp data-end=\"4177\" data-start=\"4138\"\u003eThe uploaded demonstration video shows:\u003c\/p\u003e\n\u003cul data-end=\"4475\" data-start=\"4179\"\u003e\n\u003cli data-end=\"4202\" data-start=\"4179\" data-section-id=\"1sk20o5\"\u003eThe product packaging\u003c\/li\u003e\n\u003cli data-end=\"4228\" data-start=\"4203\" data-section-id=\"xukvc3\"\u003eThe printed road layout\u003c\/li\u003e\n\u003cli data-end=\"4261\" data-start=\"4229\" data-section-id=\"j90kbu\"\u003eThe IR sensor-equipped toy car\u003c\/li\u003e\n\u003cli data-end=\"4298\" data-start=\"4262\" data-section-id=\"wrry91\"\u003eThe toy truck used as the obstacle\u003c\/li\u003e\n\u003cli data-end=\"4329\" data-start=\"4299\" data-section-id=\"5h1hao\"\u003eThe relay and buzzer section\u003c\/li\u003e\n\u003cli data-end=\"4354\" data-start=\"4330\" data-section-id=\"108h6x6\"\u003eThe battery connection\u003c\/li\u003e\n\u003cli data-end=\"4384\" data-start=\"4355\" data-section-id=\"26wmlm\"\u003ePositioning of the vehicles\u003c\/li\u003e\n\u003cli data-end=\"4422\" data-start=\"4385\" data-section-id=\"1o9nv4e\"\u003eThe obstacle-approach demonstration\u003c\/li\u003e\n\u003cli data-end=\"4454\" data-start=\"4423\" data-section-id=\"1bgt4n\"\u003eSensor and indicator response\u003c\/li\u003e\n\u003cli data-end=\"4475\" data-start=\"4455\" data-section-id=\"mag7r8\"\u003eThe warning output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"4528\" data-start=\"4477\"\u003eThe video can be accessed in three convenient ways:\u003c\/p\u003e\n\u003ch3 data-end=\"4549\" data-start=\"4530\" data-section-id=\"1nmiu3p\"\u003eProduct Gallery\u003c\/h3\u003e\n\u003cp data-end=\"4734\" data-start=\"4551\"\u003eThe demonstration video is placed alongside the product images on the Go Science product page, allowing parents, teachers and students to see the actual model working before purchase.\u003c\/p\u003e\n\u003ch3 data-end=\"4766\" data-start=\"4736\" data-section-id=\"1iuekfw\"\u003eGo Science YouTube Channel\u003c\/h3\u003e\n\u003cp data-end=\"4890\" data-start=\"4768\"\u003eThe video is also available through the official Go Science YouTube presence for convenient viewing, sharing and revision.\u003c\/p\u003e\n\u003ch3 data-end=\"4918\" data-start=\"4892\" data-section-id=\"mu6kxf\"\u003eQR Code on the Kit Box\u003c\/h3\u003e\n\u003cp data-end=\"5074\" data-start=\"4920\"\u003eA QR code on the side of the product box provides quick access to the video demonstration whenever students need to revisit the setup or working sequence.\u003c\/p\u003e\n\u003cp data-end=\"5120\" data-start=\"5076\"\u003eThis creates a continuous guided experience:\u003c\/p\u003e\n\u003cp data-end=\"5172\" data-start=\"5122\"\u003e\u003cstrong data-end=\"5172\" data-start=\"5122\"\u003eScan → Watch → Prepare → Demonstrate → Rewatch\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"5268\" data-start=\"5174\"\u003eInternet access and a compatible QR-scanning device are required to open the online resources.\u003c\/p\u003e\n\u003ch1 data-end=\"5305\" data-start=\"5275\" data-section-id=\"1mkj14i\"\u003eThe Invisible Chain Reaction\u003c\/h1\u003e\n\u003ch2 data-end=\"5363\" data-start=\"5307\" data-section-id=\"lpmhqp\"\u003eExplore how reflected light becomes an audible alert.\u003c\/h2\u003e\n\u003cp data-end=\"5439\" data-start=\"5365\"\u003eThe model presents obstacle detection as one connected electronic process.\u003c\/p\u003e\n\u003cp data-end=\"5638\" data-start=\"5441\"\u003eThe IR module emits invisible infrared light in the direction of travel. When a vehicle or obstacle enters the sensing area, part of that light reflects from the object and returns to the receiver.\u003c\/p\u003e\n\u003cp data-end=\"5824\" data-start=\"5640\"\u003eThe onboard comparator evaluates the reflected-light response against the selected threshold. When the response crosses that threshold, the module sends a digital trigger to the relay.\u003c\/p\u003e\n\u003cp data-end=\"5901\" data-start=\"5826\"\u003eThe relay then completes the buzzer circuit and produces the warning alert.\u003c\/p\u003e\n\u003cp data-end=\"5943\" data-start=\"5903\"\u003eStudents can trace the complete pathway:\u003c\/p\u003e\n\u003cp data-end=\"6044\" data-start=\"5945\"\u003e\u003cstrong data-end=\"6044\" data-start=\"5945\"\u003eIR Emitter → Approaching Obstacle → Reflected IR Light → Receiver → Comparator → Relay → Buzzer\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"6195\" data-start=\"6046\"\u003eEach stage performs a specific function, helping students understand how several electronic components work together to create an automatic response.\u003c\/p\u003e\n\u003ch1 data-end=\"6236\" data-start=\"6202\" data-section-id=\"c01vee\"\u003ePre-Wired for Direct Exploration\u003c\/h1\u003e\n\u003ch2 data-end=\"6282\" data-start=\"6238\" data-section-id=\"1sfjur0\"\u003eBegin with a complete working foundation.\u003c\/h2\u003e\n\u003cp data-end=\"6445\" data-start=\"6284\"\u003eThe IR sensor, comparator, relay module, active buzzer, protection diode, battery connector and circuit connections are arranged as one pre-wired working system.\u003c\/p\u003e\n\u003cp data-end=\"6513\" data-start=\"6447\"\u003eThis allows students to move directly into meaningful exploration:\u003c\/p\u003e\n\u003cul data-end=\"7058\" data-start=\"6515\"\u003e\n\u003cli data-end=\"6575\" data-start=\"6515\" data-section-id=\"fzz3zb\"\u003eObserve invisible-light sensing through its visible output\u003c\/li\u003e\n\u003cli data-end=\"6622\" data-start=\"6576\" data-section-id=\"op5uuk\"\u003eMove the vehicle through different positions\u003c\/li\u003e\n\u003cli data-end=\"6673\" data-start=\"6623\" data-section-id=\"9rh0gs\"\u003eIdentify when the detection threshold is crossed\u003c\/li\u003e\n\u003cli data-end=\"6714\" data-start=\"6674\" data-section-id=\"b1hco6\"\u003eFollow the signal from sensor to relay\u003c\/li\u003e\n\u003cli data-end=\"6761\" data-start=\"6715\" data-section-id=\"17saoxt\"\u003eHear the relay’s mechanical switching action\u003c\/li\u003e\n\u003cli data-end=\"6792\" data-start=\"6762\" data-section-id=\"1e7my4p\"\u003eListen to the warning buzzer\u003c\/li\u003e\n\u003cli data-end=\"6834\" data-start=\"6793\" data-section-id=\"g8mkjy\"\u003eRun repeated approach-and-retreat tests\u003c\/li\u003e\n\u003cli data-end=\"6873\" data-start=\"6835\" data-section-id=\"5iszk1\"\u003eCompare different obstacle positions\u003c\/li\u003e\n\u003cli data-end=\"6907\" data-start=\"6874\" data-section-id=\"5g6rvc\"\u003eRecord and explain observations\u003c\/li\u003e\n\u003cli data-end=\"6952\" data-start=\"6908\" data-section-id=\"1e0klda\"\u003eExplore the effect of threshold adjustment\u003c\/li\u003e\n\u003cli data-end=\"6994\" data-start=\"6953\" data-section-id=\"1uldjfb\"\u003eTroubleshoot changes in sensor response\u003c\/li\u003e\n\u003cli data-end=\"7058\" data-start=\"6995\" data-section-id=\"1w9qg5l\"\u003eConnect the model with wider mobility and automation concepts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"7088\" data-start=\"7060\"\u003eThe model is designed to be:\u003c\/p\u003e\n\u003cp data-end=\"7160\" data-start=\"7090\"\u003e\u003cstrong data-end=\"7160\" data-start=\"7090\"\u003eObserved → Tested → Retested → Understood → Explained → Built Upon\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch1 data-end=\"7202\" data-start=\"7167\" data-section-id=\"19y3zfv\"\u003eWatch the Complete System Respond\u003c\/h1\u003e\n\u003ch2 data-end=\"7225\" data-start=\"7204\" data-section-id=\"17a2hn7\"\u003e1. Power the Model\u003c\/h2\u003e\n\u003cp data-end=\"7296\" data-start=\"7227\"\u003eConnect a fresh 9V battery using the supplied battery snap connector.\u003c\/p\u003e\n\u003cp data-end=\"7381\" data-start=\"7298\"\u003eThe sensor and relay system receive power, and the module indicator may illuminate.\u003c\/p\u003e\n\u003ch2 data-end=\"7408\" data-start=\"7383\" data-section-id=\"ddo41f\"\u003e2. Emit Infrared Light\u003c\/h2\u003e\n\u003cp data-end=\"7485\" data-start=\"7410\"\u003eThe IR obstacle sensor continuously sends invisible infrared light forward.\u003c\/p\u003e\n\u003cp data-end=\"7612\" data-start=\"7487\"\u003eAlthough this light cannot be seen by the human eye, its effect can be observed through the electronic response of the model.\u003c\/p\u003e\n\u003ch2 data-end=\"7644\" data-start=\"7614\" data-section-id=\"7q6yb\"\u003e3. Move the Vehicle Forward\u003c\/h2\u003e\n\u003cp data-end=\"7771\" data-start=\"7646\"\u003ePlace the included toy truck or obstacle ahead on the printed road and move the IR sensor-equipped toy car slowly towards it.\u003c\/p\u003e\n\u003ch2 data-end=\"7800\" data-start=\"7773\" data-section-id=\"17ol7ra\"\u003e4. Detect the Reflection\u003c\/h2\u003e\n\u003cp data-end=\"7924\" data-start=\"7802\"\u003eAs the vehicles move closer, infrared light reflects from the obstacle and returns to the receiving element of the sensor.\u003c\/p\u003e\n\u003ch2 data-end=\"7952\" data-start=\"7926\" data-section-id=\"vkaeg3\"\u003e5. Compare the Response\u003c\/h2\u003e\n\u003cp data-end=\"8071\" data-start=\"7954\"\u003eThe onboard comparator evaluates the received reflection against the threshold selected using its adjustment control.\u003c\/p\u003e\n\u003ch2 data-end=\"8096\" data-start=\"8073\" data-section-id=\"1uoiscf\"\u003e6. Trigger the Relay\u003c\/h2\u003e\n\u003cp data-end=\"8199\" data-start=\"8098\"\u003eWhen the response crosses the selected threshold, the sensor’s digital output activates the 5V relay.\u003c\/p\u003e\n\u003cp data-end=\"8266\" data-start=\"8201\"\u003eStudents may hear a clear mechanical click as the relay switches.\u003c\/p\u003e\n\u003ch2 data-end=\"8291\" data-start=\"8268\" data-section-id=\"17rtfpo\"\u003e7. Sound the Warning\u003c\/h2\u003e\n\u003cp data-end=\"8339\" data-start=\"8293\"\u003eThe relay completes the active-buzzer circuit.\u003c\/p\u003e\n\u003cp data-end=\"8420\" data-start=\"8341\"\u003eThe buzzer produces an audible warning representing a collision-alert response.\u003c\/p\u003e\n\u003ch2 data-end=\"8447\" data-start=\"8422\" data-section-id=\"15htj4i\"\u003e8. Move Away and Reset\u003c\/h2\u003e\n\u003cp data-end=\"8580\" data-start=\"8449\"\u003eWhen the car is moved backwards and the obstacle leaves the detection zone, the reflected-light response falls below the threshold.\u003c\/p\u003e\n\u003cp data-end=\"8622\" data-start=\"8582\"\u003eThe relay releases and the buzzer stops.\u003c\/p\u003e\n\u003cp data-end=\"8649\" data-start=\"8624\"\u003eThe complete sequence is:\u003c\/p\u003e\n\u003cp data-end=\"8718\" data-start=\"8651\"\u003e\u003cstrong data-end=\"8718\" data-start=\"8651\"\u003eApproach → Detect → Compare → Switch → Warn → Move Away → Reset\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"8888\" data-start=\"8720\"\u003eThe supplied manual and packaging confirm this obstacle-triggered relay and buzzer sequence.\u003c\/p\u003e\n\u003ch1 data-end=\"8927\" data-start=\"8895\" data-section-id=\"kg0ove\"\u003eExplore the IR Obstacle Sensor\u003c\/h1\u003e\n\u003ch2 data-end=\"8994\" data-start=\"8929\" data-section-id=\"10z948o\"\u003eDiscover how invisible light can detect an approaching object.\u003c\/h2\u003e\n\u003cp data-end=\"9054\" data-start=\"8996\"\u003eThe sensor module contains two important optical elements:\u003c\/p\u003e\n\u003cul data-end=\"9122\" data-start=\"9056\"\u003e\n\u003cli data-end=\"9081\" data-start=\"9056\" data-section-id=\"1spe9jk\"\u003eAn \u003cstrong data-end=\"9081\" data-start=\"9061\"\u003einfrared emitter\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"9122\" data-start=\"9082\" data-section-id=\"gjl17x\"\u003eAn \u003cstrong data-end=\"9122\" data-start=\"9087\"\u003einfrared receiver or photodiode\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"9282\" data-start=\"9124\"\u003eThe emitter sends infrared light towards the space in front of the vehicle. When an obstacle is present, some of the light reflects back towards the receiver.\u003c\/p\u003e\n\u003cp data-end=\"9367\" data-start=\"9284\"\u003eThe sensor module converts this reflected-light response into an electronic signal.\u003c\/p\u003e\n\u003cp data-end=\"9390\" data-start=\"9369\"\u003eStudents can explore:\u003c\/p\u003e\n\u003cul data-end=\"9648\" data-start=\"9392\"\u003e\n\u003cli data-end=\"9408\" data-start=\"9392\" data-section-id=\"1vl9dp3\"\u003eInfrared light\u003c\/li\u003e\n\u003cli data-end=\"9446\" data-start=\"9409\" data-section-id=\"1mzu1oa\"\u003eInvisible electromagnetic radiation\u003c\/li\u003e\n\u003cli data-end=\"9463\" data-start=\"9447\" data-section-id=\"doy14v\"\u003eLight emission\u003c\/li\u003e\n\u003cli data-end=\"9476\" data-start=\"9464\" data-section-id=\"1ieimdr\"\u003eReflection\u003c\/li\u003e\n\u003cli data-end=\"9497\" data-start=\"9477\" data-section-id=\"5hzlbg\"\u003ePhotodiode sensing\u003c\/li\u003e\n\u003cli data-end=\"9519\" data-start=\"9498\" data-section-id=\"vhdc1e\"\u003eProximity detection\u003c\/li\u003e\n\u003cli data-end=\"9535\" data-start=\"9520\" data-section-id=\"2rubkr\"\u003eSensor inputs\u003c\/li\u003e\n\u003cli data-end=\"9560\" data-start=\"9536\" data-section-id=\"1w89n5f\"\u003eEnvironmental response\u003c\/li\u003e\n\u003cli data-end=\"9593\" data-start=\"9561\" data-section-id=\"oed5wi\"\u003eCause-and-effect relationships\u003c\/li\u003e\n\u003cli data-end=\"9648\" data-start=\"9594\" data-section-id=\"twvsw1\"\u003eConverting reflected light into an electronic output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"9743\" data-start=\"9650\"\u003eThe module detects reflected infrared light rather than directly measuring an exact distance.\u003c\/p\u003e\n\u003cp data-end=\"9780\" data-start=\"9745\"\u003eIts response can vary according to:\u003c\/p\u003e\n\u003cul data-end=\"9966\" data-start=\"9782\"\u003e\n\u003cli data-end=\"9799\" data-start=\"9782\" data-section-id=\"1askz5q\"\u003eObject distance\u003c\/li\u003e\n\u003cli data-end=\"9813\" data-start=\"9800\" data-section-id=\"uebjug\"\u003eObject size\u003c\/li\u003e\n\u003cli data-end=\"9830\" data-start=\"9814\" data-section-id=\"18fjvsl\"\u003eSurface colour\u003c\/li\u003e\n\u003cli data-end=\"9847\" data-start=\"9831\" data-section-id=\"15baeha\"\u003eSurface finish\u003c\/li\u003e\n\u003cli data-end=\"9867\" data-start=\"9848\" data-section-id=\"vohkie\"\u003eAngle of approach\u003c\/li\u003e\n\u003cli data-end=\"9886\" data-start=\"9868\" data-section-id=\"1ehmgld\"\u003eSensor alignment\u003c\/li\u003e\n\u003cli data-end=\"9913\" data-start=\"9887\" data-section-id=\"1hxu72a\"\u003eBright surrounding light\u003c\/li\u003e\n\u003cli data-end=\"9946\" data-start=\"9914\" data-section-id=\"gk3yx\"\u003eComparator sensitivity setting\u003c\/li\u003e\n\u003cli data-end=\"9966\" data-start=\"9947\" data-section-id=\"2stphy\"\u003eBattery condition\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"10035\" data-start=\"9968\"\u003eThis makes the model useful for observation and controlled testing.\u003c\/p\u003e\n\u003ch1 data-end=\"10078\" data-start=\"10042\" data-section-id=\"1gkamlt\"\u003eDiscover Threshold-Based Detection\u003c\/h1\u003e\n\u003ch2 data-end=\"10141\" data-start=\"10080\" data-section-id=\"1rsznio\"\u003eSee how a selected response level becomes a trigger point.\u003c\/h2\u003e\n\u003cp data-end=\"10223\" data-start=\"10143\"\u003eThe IR module includes an onboard comparator and adjustable sensitivity control.\u003c\/p\u003e\n\u003cp data-end=\"10395\" data-start=\"10225\"\u003eThe receiver’s reflected-light response may change gradually as an obstacle moves closer. The comparator determines when that response has crossed the selected threshold.\u003c\/p\u003e\n\u003cp data-end=\"10418\" data-start=\"10397\"\u003eStudents can observe:\u003c\/p\u003e\n\u003cul data-end=\"10616\" data-start=\"10420\"\u003e\n\u003cli data-end=\"10458\" data-start=\"10420\" data-section-id=\"emndvd\"\u003eThe sensor receiving reflected light\u003c\/li\u003e\n\u003cli data-end=\"10497\" data-start=\"10459\" data-section-id=\"39c0yv\"\u003eThe comparator checking the response\u003c\/li\u003e\n\u003cli data-end=\"10528\" data-start=\"10498\" data-section-id=\"qncnt0\"\u003eThe indicator changing state\u003c\/li\u003e\n\u003cli data-end=\"10570\" data-start=\"10529\" data-section-id=\"9p2ofq\"\u003eThe digital output triggering the relay\u003c\/li\u003e\n\u003cli data-end=\"10616\" data-start=\"10571\" data-section-id=\"p226is\"\u003eThe buzzer activating at the selected point\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"10702\" data-start=\"10618\"\u003eUnder adult or teacher guidance, small threshold adjustments may be used to explore:\u003c\/p\u003e\n\u003cul data-end=\"10973\" data-start=\"10704\"\u003e\n\u003cli data-end=\"10751\" data-start=\"10704\" data-section-id=\"jav8ee\"\u003eWhy the warning may activate earlier or later\u003c\/li\u003e\n\u003cli data-end=\"10798\" data-start=\"10752\" data-section-id=\"17j6b6l\"\u003eHow ambient light can influence the response\u003c\/li\u003e\n\u003cli data-end=\"10849\" data-start=\"10799\" data-section-id=\"3p5ah2\"\u003eHow different obstacle surfaces affect detection\u003c\/li\u003e\n\u003cli data-end=\"10880\" data-start=\"10850\" data-section-id=\"k5i12n\"\u003eWhy sensor alignment matters\u003c\/li\u003e\n\u003cli data-end=\"10931\" data-start=\"10881\" data-section-id=\"wfkkcl\"\u003eWhy only one setting should be changed at a time\u003c\/li\u003e\n\u003cli data-end=\"10973\" data-start=\"10932\" data-section-id=\"gzi4ez\"\u003eHow the model can be reset and retested\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"11073\" data-start=\"10975\"\u003eThis is a threshold-response demonstration and does not display the obstacle distance numerically.\u003c\/p\u003e\n\u003ch1 data-end=\"11111\" data-start=\"11080\" data-section-id=\"1jaeis2\"\u003eExplore Relay-Based Switching\u003c\/h1\u003e\n\u003ch2 data-end=\"11177\" data-start=\"11113\" data-section-id=\"1rcihbx\"\u003eHear an electronic signal become a physical switching action.\u003c\/h2\u003e\n\u003cp data-end=\"11258\" data-start=\"11179\"\u003eThe model includes a 5V relay between the sensor output and the buzzer circuit.\u003c\/p\u003e\n\u003cp data-end=\"11419\" data-start=\"11260\"\u003eWhen the IR module sends the trigger signal, the relay’s internal electromagnetic coil activates. Its contacts change position and complete the output circuit.\u003c\/p\u003e\n\u003cp data-end=\"11442\" data-start=\"11421\"\u003eStudents can explore:\u003c\/p\u003e\n\u003cul data-end=\"11721\" data-start=\"11444\"\u003e\n\u003cli data-end=\"11468\" data-start=\"11444\" data-section-id=\"xtcmps\"\u003eElectromagnetic relays\u003c\/li\u003e\n\u003cli data-end=\"11482\" data-start=\"11469\" data-section-id=\"1784yj5\"\u003eRelay coils\u003c\/li\u003e\n\u003cli data-end=\"11501\" data-start=\"11483\" data-section-id=\"1uowsky\"\u003eCommon terminals\u003c\/li\u003e\n\u003cli data-end=\"11526\" data-start=\"11502\" data-section-id=\"1loylah\"\u003eNormally Open contacts\u003c\/li\u003e\n\u003cli data-end=\"11562\" data-start=\"11527\" data-section-id=\"1vb81gr\"\u003eElectrically controlled switching\u003c\/li\u003e\n\u003cli data-end=\"11592\" data-start=\"11563\" data-section-id=\"tfjkun\"\u003eMechanical switching action\u003c\/li\u003e\n\u003cli data-end=\"11620\" data-start=\"11593\" data-section-id=\"1g0id1x\"\u003eSensor-controlled outputs\u003c\/li\u003e\n\u003cli data-end=\"11655\" data-start=\"11621\" data-section-id=\"1e5hjna\"\u003eInput, control and output stages\u003c\/li\u003e\n\u003cli data-end=\"11693\" data-start=\"11656\" data-section-id=\"1mqddm8\"\u003eHow one circuit can operate another\u003c\/li\u003e\n\u003cli data-end=\"11721\" data-start=\"11694\" data-section-id=\"1jo3rex\"\u003eAutomatic warning systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"11842\" data-start=\"11723\"\u003eThe relay’s indicator and mechanical click provide visible and audible evidence that the switching stage has responded.\u003c\/p\u003e\n\u003ch1 data-end=\"11878\" data-start=\"11849\" data-section-id=\"1x4ls0c\"\u003eReverse-Polarity Protection\u003c\/h1\u003e\n\u003ch2 data-end=\"11939\" data-start=\"11880\" data-section-id=\"1hc7053\"\u003eExplore how a diode helps protect the electronic system.\u003c\/h2\u003e\n\u003cp data-end=\"12015\" data-start=\"11941\"\u003eThe model includes an inline protection diode within the power connection.\u003c\/p\u003e\n\u003cp data-end=\"12238\" data-start=\"12017\"\u003eA diode allows current to flow primarily in one direction. If the battery is accidentally connected with reversed polarity, the diode helps block the incorrect current path and protect the sensitive electronic components.\u003c\/p\u003e\n\u003cp data-end=\"12261\" data-start=\"12240\"\u003eStudents can explore:\u003c\/p\u003e\n\u003cul data-end=\"12466\" data-start=\"12263\"\u003e\n\u003cli data-end=\"12295\" data-start=\"12263\" data-section-id=\"1cb3pnz\"\u003ePositive and negative polarity\u003c\/li\u003e\n\u003cli data-end=\"12323\" data-start=\"12296\" data-section-id=\"11opif3\"\u003eDirection of current flow\u003c\/li\u003e\n\u003cli data-end=\"12347\" data-start=\"12324\" data-section-id=\"19kr6iw\"\u003eBasic diode behaviour\u003c\/li\u003e\n\u003cli data-end=\"12377\" data-start=\"12348\" data-section-id=\"1oumn2a\"\u003eReverse-polarity protection\u003c\/li\u003e\n\u003cli data-end=\"12405\" data-start=\"12378\" data-section-id=\"pr26cn\"\u003eCircuit-protection design\u003c\/li\u003e\n\u003cli data-end=\"12466\" data-start=\"12406\" data-section-id=\"p6z9wy\"\u003eWhy electronic systems require correct battery orientation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"12645\" data-start=\"12468\"\u003eThe diode provides an additional protective feature. The battery should still always be connected carefully and in the correct orientation.\u003c\/p\u003e\n\u003ch1 data-end=\"12695\" data-start=\"12652\" data-section-id=\"kzdfrs\"\u003eUnderstand the Complete Functional System\u003c\/h1\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\" data-end=\"13596\" data-start=\"12697\"\u003e\n\u003cthead data-end=\"12736\" data-start=\"12697\"\u003e\n\u003ctr data-end=\"12736\" data-start=\"12697\"\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"12712\" data-start=\"12697\"\u003eSystem stage\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"12724\" data-start=\"12712\"\u003eComponent\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"md\" data-end=\"12736\" data-start=\"12724\"\u003eFunction\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-end=\"13596\" data-start=\"12751\"\u003e\n\u003ctr data-end=\"12821\" data-start=\"12751\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"12766\" data-start=\"12751\"\u003e\u003cstrong data-end=\"12765\" data-start=\"12753\"\u003eEmission\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"12779\" data-start=\"12766\"\u003eIR emitter\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"12821\" data-start=\"12779\"\u003eSends invisible infrared light forward\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"12900\" data-start=\"12822\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"12839\" data-start=\"12822\"\u003e\u003cstrong data-end=\"12838\" data-start=\"12824\"\u003eReflection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"12862\" data-start=\"12839\"\u003eApproaching obstacle\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"12900\" data-start=\"12862\"\u003eReflects part of the emitted light\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"12966\" data-start=\"12901\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"12913\" data-start=\"12901\"\u003e\u003cstrong data-end=\"12912\" data-start=\"12903\"\u003eInput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"12927\" data-start=\"12913\"\u003eIR receiver\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"12966\" data-start=\"12927\"\u003eDetects the returned infrared light\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"13059\" data-start=\"12967\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"12984\" data-start=\"12967\"\u003e\u003cstrong data-end=\"12983\" data-start=\"12969\"\u003eComparison\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13005\" data-start=\"12984\"\u003eOnboard comparator\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"13059\" data-start=\"13005\"\u003eChecks the response against the selected threshold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"13124\" data-start=\"13060\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13073\" data-start=\"13060\"\u003e\u003cstrong data-end=\"13072\" data-start=\"13062\"\u003eSignal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13090\" data-start=\"13073\"\u003eDigital output\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"13124\" data-start=\"13090\"\u003eSends the trigger to the relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"13191\" data-start=\"13125\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13141\" data-start=\"13125\"\u003e\u003cstrong data-end=\"13140\" data-start=\"13127\"\u003eSwitching\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13159\" data-start=\"13141\"\u003e5V relay module\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"13191\" data-start=\"13159\"\u003eCompletes the buzzer circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"13253\" data-start=\"13192\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13205\" data-start=\"13192\"\u003e\u003cstrong data-end=\"13204\" data-start=\"13194\"\u003eOutput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13221\" data-start=\"13205\"\u003eActive buzzer\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"13253\" data-start=\"13221\"\u003eProduces the audible warning\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"13335\" data-start=\"13254\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13271\" data-start=\"13254\"\u003e\u003cstrong data-end=\"13270\" data-start=\"13256\"\u003eProtection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13286\" data-start=\"13271\"\u003eInline diode\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"13335\" data-start=\"13286\"\u003eHelps guard against reversed battery polarity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"13402\" data-start=\"13336\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13348\" data-start=\"13336\"\u003e\u003cstrong data-end=\"13347\" data-start=\"13338\"\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13361\" data-start=\"13348\"\u003e9V battery\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"13402\" data-start=\"13361\"\u003eSupplies energy for the demonstration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"13496\" data-start=\"13403\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13417\" data-start=\"13403\"\u003e\u003cstrong data-end=\"13416\" data-start=\"13405\"\u003eContext\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13446\" data-start=\"13417\"\u003eRoad base and toy vehicles\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"13496\" data-start=\"13446\"\u003ePresent the collision-warning concept visually\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"13596\" data-start=\"13497\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13520\" data-start=\"13497\"\u003e\u003cstrong data-end=\"13519\" data-start=\"13499\"\u003eLearning support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"13539\" data-start=\"13520\"\u003eManual and video\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"13596\" data-start=\"13539\"\u003eGuide setup, testing, explanation and troubleshooting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch1 data-end=\"13650\" data-start=\"13603\" data-section-id=\"ettvc3\"\u003eA Road-Safety Context Students Can Understand\u003c\/h1\u003e\n\u003ch2 data-end=\"13711\" data-start=\"13652\" data-section-id=\"129fwdi\"\u003eConnect sensing technology with safer-mobility concepts.\u003c\/h2\u003e\n\u003cp data-end=\"13808\" data-start=\"13713\"\u003eThe printed road layout and two toy vehicles provide a clear context for the electronic system.\u003c\/p\u003e\n\u003cp data-end=\"13877\" data-start=\"13810\"\u003eEach element represents a stage within a collision-warning concept:\u003c\/p\u003e\n\u003cul data-end=\"14311\" data-start=\"13879\"\u003e\n\u003cli data-end=\"13943\" data-start=\"13879\" data-section-id=\"1eyhbrz\"\u003eThe \u003cstrong data-end=\"13908\" data-start=\"13885\"\u003esensor-equipped car\u003c\/strong\u003e represents the monitoring vehicle.\u003c\/li\u003e\n\u003cli data-end=\"13999\" data-start=\"13944\" data-section-id=\"1e9zdsh\"\u003eThe \u003cstrong data-end=\"13963\" data-start=\"13950\"\u003etoy truck\u003c\/strong\u003e represents an approaching obstacle.\u003c\/li\u003e\n\u003cli data-end=\"14051\" data-start=\"14000\" data-section-id=\"r4mf8j\"\u003eThe \u003cstrong data-end=\"14019\" data-start=\"14006\"\u003eIR module\u003c\/strong\u003e represents the detection stage.\u003c\/li\u003e\n\u003cli data-end=\"14105\" data-start=\"14052\" data-section-id=\"dea3jf\"\u003eThe \u003cstrong data-end=\"14072\" data-start=\"14058\"\u003ecomparator\u003c\/strong\u003e represents the trigger decision.\u003c\/li\u003e\n\u003cli data-end=\"14163\" data-start=\"14106\" data-section-id=\"16i2iv5\"\u003eThe \u003cstrong data-end=\"14121\" data-start=\"14112\"\u003erelay\u003c\/strong\u003e represents the automatic switching stage.\u003c\/li\u003e\n\u003cli data-end=\"14211\" data-start=\"14164\" data-section-id=\"zfph3w\"\u003eThe \u003cstrong data-end=\"14180\" data-start=\"14170\"\u003ebuzzer\u003c\/strong\u003e represents the warning output.\u003c\/li\u003e\n\u003cli data-end=\"14267\" data-start=\"14212\" data-section-id=\"1ijskjl\"\u003eThe \u003cstrong data-end=\"14233\" data-start=\"14218\"\u003eroad layout\u003c\/strong\u003e provides the application context.\u003c\/li\u003e\n\u003cli data-end=\"14311\" data-start=\"14268\" data-section-id=\"tqqd5u\"\u003eThe \u003cstrong data-end=\"14285\" data-start=\"14274\"\u003ebattery\u003c\/strong\u003e powers the demonstration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"14353\" data-start=\"14313\"\u003eThis arrangement helps students explain:\u003c\/p\u003e\n\u003cul data-end=\"14616\" data-start=\"14355\"\u003e\n\u003cli data-end=\"14395\" data-start=\"14355\" data-section-id=\"179k9c5\"\u003eHow the system observes the road ahead\u003c\/li\u003e\n\u003cli data-end=\"14429\" data-start=\"14396\" data-section-id=\"1fhptx0\"\u003eHow reflected light is detected\u003c\/li\u003e\n\u003cli data-end=\"14471\" data-start=\"14430\" data-section-id=\"vs3g5o\"\u003eHow a threshold creates a trigger point\u003c\/li\u003e\n\u003cli data-end=\"14509\" data-start=\"14472\" data-section-id=\"vmy81f\"\u003eHow the warning output is activated\u003c\/li\u003e\n\u003cli data-end=\"14557\" data-start=\"14510\" data-section-id=\"apg1zm\"\u003eHow sensing can support road-safety awareness\u003c\/li\u003e\n\u003cli data-end=\"14616\" data-start=\"14558\" data-section-id=\"d758b7\"\u003eHow several components operate as one coordinated system\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"14692\" data-start=\"14618\"\u003eThe model demonstrates \u003cstrong data-end=\"14668\" data-start=\"14641\"\u003ecollision-warning logic\u003c\/strong\u003e in a classroom context.\u003c\/p\u003e\n\u003ch1 data-end=\"14725\" data-start=\"14699\" data-section-id=\"z0ux1z\"\u003eTest. Observe. Discover.\u003c\/h1\u003e\n\u003cp data-end=\"14812\" data-start=\"14727\"\u003eThe model supports several controlled investigations using the included toy vehicles.\u003c\/p\u003e\n\u003ch2 data-end=\"14842\" data-start=\"14814\" data-section-id=\"1l0v7db\"\u003eApproach-and-Retreat Test\u003c\/h2\u003e\n\u003cp data-end=\"14897\" data-start=\"14844\"\u003ePlace the toy truck ahead of the sensor-equipped car.\u003c\/p\u003e\n\u003cp data-end=\"15003\" data-start=\"14899\"\u003eMove the car slowly forward until the warning activates. Then move it backwards until the warning stops.\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\" data-end=\"15236\" data-start=\"15005\"\u003e\n\u003cthead data-end=\"15086\" data-start=\"15005\"\u003e\n\u003ctr data-end=\"15086\" data-start=\"15005\"\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"15012\" data-start=\"15005\"\u003eTest\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"15031\" data-start=\"15012\"\u003eVehicle movement\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"15050\" data-start=\"15031\"\u003eSensor indicator\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"15067\" data-start=\"15050\"\u003eRelay response\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"15086\" data-start=\"15067\"\u003eBuzzer response\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-end=\"15236\" data-start=\"15109\"\u003e\n\u003ctr data-end=\"15143\" data-start=\"15109\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15113\" data-start=\"15109\"\u003e1\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15133\" data-start=\"15113\"\u003eFar from obstacle\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15136\" data-start=\"15133\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15139\" data-start=\"15136\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15143\" data-start=\"15139\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"15174\" data-start=\"15144\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15148\" data-start=\"15144\"\u003e2\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15164\" data-start=\"15148\"\u003eMoving closer\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15167\" data-start=\"15164\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15170\" data-start=\"15167\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15174\" data-start=\"15170\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"15207\" data-start=\"15175\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15179\" data-start=\"15175\"\u003e3\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15197\" data-start=\"15179\"\u003eDetection point\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15200\" data-start=\"15197\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15203\" data-start=\"15200\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15207\" data-start=\"15203\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"15236\" data-start=\"15208\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15212\" data-start=\"15208\"\u003e4\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15226\" data-start=\"15212\"\u003eMoving away\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15229\" data-start=\"15226\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15232\" data-start=\"15229\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"15236\" data-start=\"15232\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 data-end=\"15259\" data-start=\"15238\" data-section-id=\"1sczom\"\u003eRepeatability Test\u003c\/h2\u003e\n\u003cp data-end=\"15317\" data-start=\"15261\"\u003eRepeat the same approach using a similar path and speed.\u003c\/p\u003e\n\u003cp data-end=\"15391\" data-start=\"15319\"\u003eRecord whether the warning activates at approximately the same position.\u003c\/p\u003e\n\u003ch2 data-end=\"15415\" data-start=\"15393\" data-section-id=\"b13lge\"\u003eObstacle-Angle Test\u003c\/h2\u003e\n\u003cp data-end=\"15464\" data-start=\"15417\"\u003eTurn the obstacle slightly to different angles.\u003c\/p\u003e\n\u003cp data-end=\"15546\" data-start=\"15466\"\u003eObserve how the direction of the reflecting surface affects the sensor response.\u003c\/p\u003e\n\u003ch2 data-end=\"15574\" data-start=\"15548\" data-section-id=\"4zznxo\"\u003eSurface-Reflection Test\u003c\/h2\u003e\n\u003cp data-end=\"15652\" data-start=\"15576\"\u003eUnder teacher supervision, place different safe objects ahead of the sensor.\u003c\/p\u003e\n\u003cp data-end=\"15680\" data-start=\"15654\"\u003eCompare the response from:\u003c\/p\u003e\n\u003cul data-end=\"15804\" data-start=\"15682\"\u003e\n\u003cli data-end=\"15707\" data-start=\"15682\" data-section-id=\"1xgkw0k\"\u003eLight-coloured surfaces\u003c\/li\u003e\n\u003cli data-end=\"15732\" data-start=\"15708\" data-section-id=\"faetcm\"\u003eDark-coloured surfaces\u003c\/li\u003e\n\u003cli data-end=\"15750\" data-start=\"15733\" data-section-id=\"2785ho\"\u003eSmooth surfaces\u003c\/li\u003e\n\u003cli data-end=\"15770\" data-start=\"15751\" data-section-id=\"rnq8tx\"\u003eTextured surfaces\u003c\/li\u003e\n\u003cli data-end=\"15786\" data-start=\"15771\" data-section-id=\"fanno1\"\u003eFlat surfaces\u003c\/li\u003e\n\u003cli data-end=\"15804\" data-start=\"15787\" data-section-id=\"1ejv5kt\"\u003eCurved surfaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"15917\" data-start=\"15806\"\u003eThis helps students understand that reflected-light sensors depend on the optical characteristics of an object.\u003c\/p\u003e\n\u003ch2 data-end=\"15947\" data-start=\"15919\" data-section-id=\"xpsgjw\"\u003eAmbient-Light Observation\u003c\/h2\u003e\n\u003cp data-end=\"16044\" data-start=\"15949\"\u003eCompare the model’s response in normal indoor lighting and near a bright window or direct lamp.\u003c\/p\u003e\n\u003cp data-end=\"16119\" data-start=\"16046\"\u003eBright light may influence the optical sensor and its threshold response.\u003c\/p\u003e\n\u003ch2 data-end=\"16147\" data-start=\"16121\" data-section-id=\"etvoll\"\u003eSensitivity Exploration\u003c\/h2\u003e\n\u003cp data-end=\"16232\" data-start=\"16149\"\u003eUnder adult or teacher supervision, make a small adjustment to the onboard trimmer.\u003c\/p\u003e\n\u003cp data-end=\"16301\" data-start=\"16234\"\u003eRepeat the approach test and observe how the trigger point changes.\u003c\/p\u003e\n\u003cp data-end=\"16384\" data-start=\"16303\"\u003eOnly small adjustments should be made, and the original position should be noted.\u003c\/p\u003e\n\u003ch2 data-end=\"16414\" data-start=\"16386\" data-section-id=\"6ow1gb\"\u003eSignal-Path Investigation\u003c\/h2\u003e\n\u003cp data-end=\"16448\" data-start=\"16416\"\u003eStudents can identify and trace:\u003c\/p\u003e\n\u003cul data-end=\"16601\" data-start=\"16450\"\u003e\n\u003cli data-end=\"16462\" data-start=\"16450\" data-section-id=\"1wiq5dx\"\u003eIR emitter\u003c\/li\u003e\n\u003cli data-end=\"16476\" data-start=\"16463\" data-section-id=\"44n3sa\"\u003eIR receiver\u003c\/li\u003e\n\u003cli data-end=\"16489\" data-start=\"16477\" data-section-id=\"a5w8ki\"\u003eComparator\u003c\/li\u003e\n\u003cli data-end=\"16517\" data-start=\"16490\" data-section-id=\"1tlgbzq\"\u003eDigital-output connection\u003c\/li\u003e\n\u003cli data-end=\"16531\" data-start=\"16518\" data-section-id=\"171fw4d\"\u003eRelay input\u003c\/li\u003e\n\u003cli data-end=\"16548\" data-start=\"16532\" data-section-id=\"x8hby0\"\u003eRelay contacts\u003c\/li\u003e\n\u003cli data-end=\"16565\" data-start=\"16549\" data-section-id=\"1adg1sr\"\u003eBuzzer circuit\u003c\/li\u003e\n\u003cli data-end=\"16584\" data-start=\"16566\" data-section-id=\"eqhw7c\"\u003eProtection diode\u003c\/li\u003e\n\u003cli data-end=\"16601\" data-start=\"16585\" data-section-id=\"6y3wxi\"\u003eBattery supply\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-end=\"16643\" data-start=\"16608\" data-section-id=\"st14a9\"\u003eLearn Through Every Demonstration\u003c\/h1\u003e\n\u003ch3 data-end=\"16654\" data-start=\"16645\" data-section-id=\"74yqa7\"\u003eWatch\u003c\/h3\u003e\n\u003cp data-end=\"16713\" data-start=\"16656\"\u003eReview the complete video demonstration before beginning.\u003c\/p\u003e\n\u003ch3 data-end=\"16726\" data-start=\"16715\" data-section-id=\"y9l8or\"\u003ePredict\u003c\/h3\u003e\n\u003cp data-end=\"16769\" data-start=\"16728\"\u003eAt what point might the warning activate?\u003c\/p\u003e\n\u003ch3 data-end=\"16782\" data-start=\"16771\" data-section-id=\"y9uabr\"\u003ePrepare\u003c\/h3\u003e\n\u003cp data-end=\"16845\" data-start=\"16784\"\u003ePosition the vehicles and ensure the sensor pathway is clear.\u003c\/p\u003e\n\u003ch3 data-end=\"16855\" data-start=\"16847\" data-section-id=\"ynqv2o\"\u003eTest\u003c\/h3\u003e\n\u003cp data-end=\"16914\" data-start=\"16857\"\u003eMove the sensor-equipped car slowly towards the obstacle.\u003c\/p\u003e\n\u003ch3 data-end=\"16927\" data-start=\"16916\" data-section-id=\"sizzw\"\u003eObserve\u003c\/h3\u003e\n\u003cp data-end=\"16997\" data-start=\"16929\"\u003eWatch the indicator, listen for the relay click and hear the buzzer.\u003c\/p\u003e\n\u003ch3 data-end=\"17009\" data-start=\"16999\" data-section-id=\"pjpz2j\"\u003eRecord\u003c\/h3\u003e\n\u003cp data-end=\"17076\" data-start=\"17011\"\u003eDocument the obstacle type, position, angle and warning response.\u003c\/p\u003e\n\u003ch3 data-end=\"17089\" data-start=\"17078\" data-section-id=\"1ob2s0x\"\u003eCompare\u003c\/h3\u003e\n\u003cp data-end=\"17149\" data-start=\"17091\"\u003eRepeat the activity using different positions or surfaces.\u003c\/p\u003e\n\u003ch3 data-end=\"17162\" data-start=\"17151\" data-section-id=\"14mypyj\"\u003eAnalyse\u003c\/h3\u003e\n\u003cp data-end=\"17226\" data-start=\"17164\"\u003eExplain why the warning activated sooner, later or not at all.\u003c\/p\u003e\n\u003ch3 data-end=\"17244\" data-start=\"17228\" data-section-id=\"1bn6r32\"\u003eTroubleshoot\u003c\/h3\u003e\n\u003cp data-end=\"17334\" data-start=\"17246\"\u003eCheck the battery, ambient light, sensor alignment, sensitivity and visible connections.\u003c\/p\u003e\n\u003ch3 data-end=\"17347\" data-start=\"17336\" data-section-id=\"16njeap\"\u003eExplain\u003c\/h3\u003e\n\u003cp data-end=\"17406\" data-start=\"17349\"\u003eDescribe the complete reflected-light-to-warning pathway.\u003c\/p\u003e\n\u003ch3 data-end=\"17418\" data-start=\"17408\" data-section-id=\"gd19q8\"\u003eExtend\u003c\/h3\u003e\n\u003cp data-end=\"17518\" data-start=\"17420\"\u003eDevelop further questions about proximity sensing, robotics, mobility and automatic alert systems.\u003c\/p\u003e\n\u003ch1 data-end=\"17547\" data-start=\"17525\" data-section-id=\"1hhrn0b\"\u003eExplore Key Concepts\u003c\/h1\u003e\n\u003ch2 data-end=\"17568\" data-start=\"17549\" data-section-id=\"x6fkr3\"\u003eInfrared Sensing\u003c\/h2\u003e\n\u003cul data-end=\"17684\" data-start=\"17570\"\u003e\n\u003cli data-end=\"17586\" data-start=\"17570\" data-section-id=\"1vl9dp3\"\u003eInfrared light\u003c\/li\u003e\n\u003cli data-end=\"17608\" data-start=\"17587\" data-section-id=\"swbcy\"\u003eInvisible radiation\u003c\/li\u003e\n\u003cli data-end=\"17622\" data-start=\"17609\" data-section-id=\"1n7h8gm\"\u003eIR emitters\u003c\/li\u003e\n\u003cli data-end=\"17636\" data-start=\"17623\" data-section-id=\"1xzp8l0\"\u003ePhotodiodes\u003c\/li\u003e\n\u003cli data-end=\"17664\" data-start=\"17637\" data-section-id=\"3s7kai\"\u003eReflected-light detection\u003c\/li\u003e\n\u003cli data-end=\"17684\" data-start=\"17665\" data-section-id=\"ftct06\"\u003eProximity sensing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"17708\" data-start=\"17686\" data-section-id=\"1yc2o4n\"\u003eElectronic Circuits\u003c\/h2\u003e\n\u003cul data-end=\"17821\" data-start=\"17710\"\u003e\n\u003cli data-end=\"17726\" data-start=\"17710\" data-section-id=\"c392pj\"\u003eSensor modules\u003c\/li\u003e\n\u003cli data-end=\"17748\" data-start=\"17727\" data-section-id=\"1d81dvm\"\u003eComparator circuits\u003c\/li\u003e\n\u003cli data-end=\"17772\" data-start=\"17749\" data-section-id=\"105elkr\"\u003eAdjustable thresholds\u003c\/li\u003e\n\u003cli data-end=\"17789\" data-start=\"17773\" data-section-id=\"bkk33h\"\u003eDigital output\u003c\/li\u003e\n\u003cli data-end=\"17804\" data-start=\"17790\" data-section-id=\"y1gkec\"\u003ePower supply\u003c\/li\u003e\n\u003cli data-end=\"17821\" data-start=\"17805\" data-section-id=\"br6xl1\"\u003eAudible output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"17841\" data-start=\"17823\" data-section-id=\"3x7uvo\"\u003eRelay Switching\u003c\/h2\u003e\n\u003cul data-end=\"17982\" data-start=\"17843\"\u003e\n\u003cli data-end=\"17866\" data-start=\"17843\" data-section-id=\"1pl9xbe\"\u003eElectromagnetic coils\u003c\/li\u003e\n\u003cli data-end=\"17883\" data-start=\"17867\" data-section-id=\"x8hby0\"\u003eRelay contacts\u003c\/li\u003e\n\u003cli data-end=\"17909\" data-start=\"17884\" data-section-id=\"a5wq4o\"\u003eNormally Open switching\u003c\/li\u003e\n\u003cli data-end=\"17938\" data-start=\"17910\" data-section-id=\"1xdnvpt\"\u003eSignal-controlled circuits\u003c\/li\u003e\n\u003cli data-end=\"17959\" data-start=\"17939\" data-section-id=\"14788d2\"\u003eAutomatic response\u003c\/li\u003e\n\u003cli data-end=\"17982\" data-start=\"17960\" data-section-id=\"1kq8cnl\"\u003eMechanical switching\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"18005\" data-start=\"17984\" data-section-id=\"djhaj9\"\u003eCircuit Protection\u003c\/h2\u003e\n\u003cul data-end=\"18115\" data-start=\"18007\"\u003e\n\u003cli data-end=\"18025\" data-start=\"18007\" data-section-id=\"1nwhmwx\"\u003eBattery polarity\u003c\/li\u003e\n\u003cli data-end=\"18043\" data-start=\"18026\" data-section-id=\"1xu5j9a\"\u003eDiode operation\u003c\/li\u003e\n\u003cli data-end=\"18066\" data-start=\"18044\" data-section-id=\"v4eb4d\"\u003eDirection of current\u003c\/li\u003e\n\u003cli data-end=\"18096\" data-start=\"18067\" data-section-id=\"1oumn2a\"\u003eReverse-polarity protection\u003c\/li\u003e\n\u003cli data-end=\"18115\" data-start=\"18097\" data-section-id=\"84novv\"\u003eComponent safety\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"18140\" data-start=\"18117\" data-section-id=\"hctrlr\"\u003eRoad-Safety Concepts\u003c\/h2\u003e\n\u003cul data-end=\"18282\" data-start=\"18142\"\u003e\n\u003cli data-end=\"18162\" data-start=\"18142\" data-section-id=\"m75tk2\"\u003eObstacle awareness\u003c\/li\u003e\n\u003cli data-end=\"18188\" data-start=\"18163\" data-section-id=\"7w4in\"\u003eCollision-warning logic\u003c\/li\u003e\n\u003cli data-end=\"18217\" data-start=\"18189\" data-section-id=\"1v9dnda\"\u003eDriver-assistance concepts\u003c\/li\u003e\n\u003cli data-end=\"18235\" data-start=\"18218\" data-section-id=\"1iktdqs\"\u003eWarning systems\u003c\/li\u003e\n\u003cli data-end=\"18252\" data-start=\"18236\" data-section-id=\"k1zv4a\"\u003eSafer mobility\u003c\/li\u003e\n\u003cli data-end=\"18282\" data-start=\"18253\" data-section-id=\"hbgglb\"\u003eSensor-assisted observation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"18310\" data-start=\"18284\" data-section-id=\"bhz16e\"\u003ePractical Investigation\u003c\/h2\u003e\n\u003cul data-end=\"18440\" data-start=\"18312\"\u003e\n\u003cli data-end=\"18333\" data-start=\"18312\" data-section-id=\"hskyzl\"\u003eControlled movement\u003c\/li\u003e\n\u003cli data-end=\"18349\" data-start=\"18334\" data-section-id=\"1at15ml\"\u003eRepeatability\u003c\/li\u003e\n\u003cli data-end=\"18373\" data-start=\"18350\" data-section-id=\"1mss9di\"\u003eReflection comparison\u003c\/li\u003e\n\u003cli data-end=\"18393\" data-start=\"18374\" data-section-id=\"prsr55\"\u003eThreshold testing\u003c\/li\u003e\n\u003cli data-end=\"18422\" data-start=\"18394\" data-section-id=\"sggcpd\"\u003eCause-and-effect reasoning\u003c\/li\u003e\n\u003cli data-end=\"18440\" data-start=\"18423\" data-section-id=\"z1z1u8\"\u003eTroubleshooting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-end=\"18487\" data-start=\"18447\" data-section-id=\"1yowdg0\"\u003eOne Model. Multiple Learning Outcomes.\u003c\/h1\u003e\n\u003cp data-end=\"18530\" data-start=\"18489\"\u003eThe model allows students to explore how:\u003c\/p\u003e\n\u003cul data-end=\"19042\" data-start=\"18532\"\u003e\n\u003cli data-end=\"18586\" data-start=\"18532\" data-section-id=\"21a1lk\"\u003eInvisible infrared light can be emitted and detected\u003c\/li\u003e\n\u003cli data-end=\"18635\" data-start=\"18587\" data-section-id=\"18xpndw\"\u003eAn obstacle can reflect light towards a sensor\u003c\/li\u003e\n\u003cli data-end=\"18693\" data-start=\"18636\" data-section-id=\"nvou7i\"\u003eA photodiode converts light into an electronic response\u003c\/li\u003e\n\u003cli data-end=\"18748\" data-start=\"18694\" data-section-id=\"1qv7zh9\"\u003eA comparator checks the response against a threshold\u003c\/li\u003e\n\u003cli data-end=\"18785\" data-start=\"18749\" data-section-id=\"qoqvj9\"\u003eA digital signal activates a relay\u003c\/li\u003e\n\u003cli data-end=\"18830\" data-start=\"18786\" data-section-id=\"kqqtax\"\u003eA relay switches a separate buzzer circuit\u003c\/li\u003e\n\u003cli data-end=\"18881\" data-start=\"18831\" data-section-id=\"1l1n3kq\"\u003eA warning can reset when the obstacle moves away\u003c\/li\u003e\n\u003cli data-end=\"18934\" data-start=\"18882\" data-section-id=\"11axwby\"\u003eObject position and surface affect optical sensing\u003c\/li\u003e\n\u003cli data-end=\"18989\" data-start=\"18935\" data-section-id=\"1l6vxgj\"\u003eSeveral components operate as one coordinated system\u003c\/li\u003e\n\u003cli data-end=\"19042\" data-start=\"18990\" data-section-id=\"1g8j5xd\"\u003eSensor technology can support road-safety concepts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-end=\"19084\" data-start=\"19049\" data-section-id=\"1hdonrc\"\u003eBuilt for Confident Demonstration\u003c\/h1\u003e\n\u003cp data-end=\"19219\" data-start=\"19086\"\u003eThe visible road layout, included vehicles, relay response, warning buzzer and guided learning resources make the model suitable for:\u003c\/p\u003e\n\u003cul data-end=\"19648\" data-start=\"19221\"\u003e\n\u003cli data-end=\"19246\" data-start=\"19221\" data-section-id=\"cas5ce\"\u003eSchool science projects\u003c\/li\u003e\n\u003cli data-end=\"19268\" data-start=\"19247\" data-section-id=\"kiq2zo\"\u003eScience exhibitions\u003c\/li\u003e\n\u003cli data-end=\"19295\" data-start=\"19269\" data-section-id=\"1e0u4lr\"\u003eClassroom demonstrations\u003c\/li\u003e\n\u003cli data-end=\"19322\" data-start=\"19296\" data-section-id=\"1jfdj8z\"\u003eIR sensor demonstrations\u003c\/li\u003e\n\u003cli data-end=\"19355\" data-start=\"19323\" data-section-id=\"gkjo0y\"\u003eRelay-switching demonstrations\u003c\/li\u003e\n\u003cli data-end=\"19385\" data-start=\"19356\" data-section-id=\"1c4nh5z\"\u003eReflected-light experiments\u003c\/li\u003e\n\u003cli data-end=\"19413\" data-start=\"19386\" data-section-id=\"vbj85g\"\u003eRoad-safety presentations\u003c\/li\u003e\n\u003cli data-end=\"19448\" data-start=\"19414\" data-section-id=\"1iq7lrh\"\u003eCollision-warning concept models\u003c\/li\u003e\n\u003cli data-end=\"19478\" data-start=\"19449\" data-section-id=\"iejdeo\"\u003eSensor-circuit explanations\u003c\/li\u003e\n\u003cli data-end=\"19511\" data-start=\"19479\" data-section-id=\"v7nswk\"\u003eProximity-detection activities\u003c\/li\u003e\n\u003cli data-end=\"19527\" data-start=\"19512\" data-section-id=\"1v9xwk3\"\u003eSTEM learning\u003c\/li\u003e\n\u003cli data-end=\"19551\" data-start=\"19528\" data-section-id=\"1nl6elw\"\u003eExperiential learning\u003c\/li\u003e\n\u003cli data-end=\"19576\" data-start=\"19552\" data-section-id=\"1o2e6vp\"\u003eProject-based learning\u003c\/li\u003e\n\u003cli data-end=\"19605\" data-start=\"19577\" data-section-id=\"4tplyf\"\u003eProject-report preparation\u003c\/li\u003e\n\u003cli data-end=\"19634\" data-start=\"19606\" data-section-id=\"1o8392l\"\u003eViva and oral presentation\u003c\/li\u003e\n\u003cli data-end=\"19648\" data-start=\"19635\" data-section-id=\"11hgo15\"\u003eGrades 7–12\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-end=\"19686\" data-start=\"19655\" data-section-id=\"14d3cd5\"\u003eSuggested Student Explanation\u003c\/h1\u003e\n\u003cblockquote data-end=\"20334\" data-start=\"19688\"\u003e\n\u003cp data-end=\"20334\" data-start=\"19690\"\u003e“This is an obstacle-detection and collision-warning working model using an infrared sensor. The sensor emits invisible infrared light in front of the vehicle. When an obstacle approaches, some of this light reflects back to the receiver. The comparator checks the reflected-light response against a selected threshold. When the threshold is crossed, the module sends a signal to the relay. The relay completes the buzzer circuit and produces a warning alert. When the vehicle moves away, the relay releases and the buzzer stops. The model demonstrates IR sensing, reflected light, threshold response, relay switching and road-safety concepts.”\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch1 data-end=\"20368\" data-start=\"20341\" data-section-id=\"kts086\"\u003eBuild Upon the Foundation\u003c\/h1\u003e\n\u003cp data-end=\"20478\" data-start=\"20370\"\u003eOnce students understand the original obstacle-to-warning sequence, the model can inspire further questions:\u003c\/p\u003e\n\u003cul data-end=\"21117\" data-start=\"20480\"\u003e\n\u003cli data-end=\"20520\" data-start=\"20480\" data-section-id=\"pvc0p4\"\u003eCould an LED provide a visual warning?\u003c\/li\u003e\n\u003cli data-end=\"20565\" data-start=\"20521\" data-section-id=\"jkjltl\"\u003eCould different warning stages be created?\u003c\/li\u003e\n\u003cli data-end=\"20619\" data-start=\"20566\" data-section-id=\"6bae91\"\u003eCould the sensor response be displayed numerically?\u003c\/li\u003e\n\u003cli data-end=\"20669\" data-start=\"20620\" data-section-id=\"ga4xo0\"\u003eCould two sensors monitor different directions?\u003c\/li\u003e\n\u003cli data-end=\"20720\" data-start=\"20670\" data-section-id=\"1fjsldo\"\u003eCould a microcontroller record detection events?\u003c\/li\u003e\n\u003cli data-end=\"20767\" data-start=\"20721\" data-section-id=\"1r8frb8\"\u003eCould a servo demonstrate steering response?\u003c\/li\u003e\n\u003cli data-end=\"20816\" data-start=\"20768\" data-section-id=\"uf1rcv\"\u003eCould a model motor demonstrate braking logic?\u003c\/li\u003e\n\u003cli data-end=\"20873\" data-start=\"20817\" data-section-id=\"168i7f\"\u003eCould the project become a parking-assistance concept?\u003c\/li\u003e\n\u003cli data-end=\"20928\" data-start=\"20874\" data-section-id=\"kmr60p\"\u003eCould it be expanded into a robot obstacle detector?\u003c\/li\u003e\n\u003cli data-end=\"20979\" data-start=\"20929\" data-section-id=\"1v043kh\"\u003eCould different sensor technologies be compared?\u003c\/li\u003e\n\u003cli data-end=\"21040\" data-start=\"20980\" data-section-id=\"5udi15\"\u003eHow would ultrasonic sensing differ from infrared sensing?\u003c\/li\u003e\n\u003cli data-end=\"21117\" data-start=\"21041\" data-section-id=\"v04l5i\"\u003eWhy do real automotive systems use multiple sensors and testing standards?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"21241\" data-start=\"21119\"\u003eThese are further learning directions. Additional components, programming and suitable technical guidance may be required.\u003c\/p\u003e\n\u003ch1 data-end=\"21290\" data-start=\"21248\" data-section-id=\"1sdrx7j\"\u003eThis Concept Can Also Be Used to Explore\u003c\/h1\u003e\n\u003cp data-end=\"21377\" data-start=\"21292\"\u003eThe sensing, comparison, switching and alert sequence can support discussions around:\u003c\/p\u003e\n\u003cul data-end=\"21852\" data-start=\"21379\"\u003e\n\u003cli data-end=\"21415\" data-start=\"21379\" data-section-id=\"1qlzntm\"\u003eVehicle collision-warning concepts\u003c\/li\u003e\n\u003cli data-end=\"21445\" data-start=\"21416\" data-section-id=\"evpla0\"\u003eParking-assistance concepts\u003c\/li\u003e\n\u003cli data-end=\"21472\" data-start=\"21446\" data-section-id=\"otl3k2\"\u003eRobot obstacle detection\u003c\/li\u003e\n\u003cli data-end=\"21500\" data-start=\"21473\" data-section-id=\"vsieks\"\u003eProximity-warning systems\u003c\/li\u003e\n\u003cli data-end=\"21533\" data-start=\"21501\" data-section-id=\"3uvh3f\"\u003eAutomatic-door sensor concepts\u003c\/li\u003e\n\u003cli data-end=\"21561\" data-start=\"21534\" data-section-id=\"19o0plf\"\u003eWarehouse movement alerts\u003c\/li\u003e\n\u003cli data-end=\"21586\" data-start=\"21562\" data-section-id=\"1qs0yp7\"\u003eSmart-mobility systems\u003c\/li\u003e\n\u003cli data-end=\"21618\" data-start=\"21587\" data-section-id=\"ukh5go\"\u003eBlind-spot awareness concepts\u003c\/li\u003e\n\u003cli data-end=\"21646\" data-start=\"21619\" data-section-id=\"1s1hpb3\"\u003eObject-detection circuits\u003c\/li\u003e\n\u003cli data-end=\"21674\" data-start=\"21647\" data-section-id=\"1q6xm5s\"\u003eIR security-beam concepts\u003c\/li\u003e\n\u003cli data-end=\"21701\" data-start=\"21675\" data-section-id=\"1rti3x5\"\u003eSensor-controlled alarms\u003c\/li\u003e\n\u003cli data-end=\"21734\" data-start=\"21702\" data-section-id=\"ls618m\"\u003eRelay-operated warning systems\u003c\/li\u003e\n\u003cli data-end=\"21763\" data-start=\"21735\" data-section-id=\"1h9q2i\"\u003eReflective optical sensing\u003c\/li\u003e\n\u003cli data-end=\"21797\" data-start=\"21764\" data-section-id=\"1ocjw3v\"\u003eAutomatic notification concepts\u003c\/li\u003e\n\u003cli data-end=\"21828\" data-start=\"21798\" data-section-id=\"1k5z7ks\"\u003eInput-process-output systems\u003c\/li\u003e\n\u003cli data-end=\"21852\" data-start=\"21829\" data-section-id=\"47byvp\"\u003eElectronic automation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"22008\" data-start=\"21854\"\u003eThese are \u003cstrong data-end=\"21898\" data-start=\"21864\"\u003eeducational concept extensions\u003c\/strong\u003e based on the model’s functional sequence. They are not additional built-in functions of the supplied product.\u003c\/p\u003e\n\u003ch1 data-end=\"24382\" data-start=\"24346\" data-section-id=\"fv0nqt\"\u003eCurriculum and Concept Connections\u003c\/h1\u003e\n\u003cp data-end=\"24436\" data-start=\"24384\"\u003eThe project can support classroom discussion around:\u003c\/p\u003e\n\u003cul data-end=\"24707\" data-start=\"24438\"\u003e\n\u003cli data-end=\"24475\" data-start=\"24438\" data-section-id=\"e42tt6\"\u003eElectricity and electrical circuits\u003c\/li\u003e\n\u003cli data-end=\"24514\" data-start=\"24476\" data-section-id=\"110svch\"\u003eMagnetic effects of electric current\u003c\/li\u003e\n\u003cli data-end=\"24548\" data-start=\"24515\" data-section-id=\"15wvi06\"\u003eElectromagnetic relay operation\u003c\/li\u003e\n\u003cli data-end=\"24576\" data-start=\"24549\" data-section-id=\"1fvdz4v\"\u003eSemiconductor photodiodes\u003c\/li\u003e\n\u003cli data-end=\"24598\" data-start=\"24577\" data-section-id=\"tfd3qm\"\u003eInfrared reflection\u003c\/li\u003e\n\u003cli data-end=\"24618\" data-start=\"24599\" data-section-id=\"1cj7c3c\"\u003eSensor technology\u003c\/li\u003e\n\u003cli data-end=\"24646\" data-start=\"24619\" data-section-id=\"1jo3rex\"\u003eAutomatic warning systems\u003c\/li\u003e\n\u003cli data-end=\"24670\" data-start=\"24647\" data-section-id=\"1bqxv1m\"\u003eRoad-safety awareness\u003c\/li\u003e\n\u003cli data-end=\"24707\" data-start=\"24671\" data-section-id=\"12gpd19\"\u003eInput-process-output relationships\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"25031\" data-start=\"24709\"\u003eThe supplied concept-mapping document links the model with selected electricity, electromagnetism, semiconductor-sensing and road-safety concepts for Grades 7–12. These are independent educational references and do not imply approval or endorsement by NCERT, CBSE or any school board.\u003c\/p\u003e\n\u003chr data-end=\"25036\" data-start=\"25033\"\u003e\n\u003ch1 data-end=\"25067\" data-start=\"25038\" data-section-id=\"158v5je\"\u003eA Complete Learning Journey\u003c\/h1\u003e\n\u003ch2 data-end=\"25088\" data-start=\"25069\" data-section-id=\"4j6q80\"\u003eScan the code.\u003c\/h2\u003e\n\u003ch2 data-end=\"25118\" data-start=\"25089\" data-section-id=\"1ns05dq\"\u003eWatch the demonstration.\u003c\/h2\u003e\n\u003ch2 data-end=\"25140\" data-start=\"25119\" data-section-id=\"1sl89mi\"\u003eRead the manual.\u003c\/h2\u003e\n\u003ch2 data-end=\"25168\" data-start=\"25141\" data-section-id=\"mfaau8\"\u003ePosition the vehicles.\u003c\/h2\u003e\n\u003ch2 data-end=\"25190\" data-start=\"25169\" data-section-id=\"bebe8y\"\u003ePower the model.\u003c\/h2\u003e\n\u003ch2 data-end=\"25222\" data-start=\"25191\" data-section-id=\"17zeqay\"\u003eMove towards the obstacle.\u003c\/h2\u003e\n\u003ch2 data-end=\"25255\" data-start=\"25223\" data-section-id=\"1qddzg3\"\u003eFollow the reflected light.\u003c\/h2\u003e\n\u003ch2 data-end=\"25283\" data-start=\"25256\" data-section-id=\"i5h6jh\"\u003eHear the relay switch.\u003c\/h2\u003e\n\u003ch2 data-end=\"25311\" data-start=\"25284\" data-section-id=\"oa3w16\"\u003eListen to the warning.\u003c\/h2\u003e\n\u003ch2 data-end=\"25337\" data-start=\"25312\" data-section-id=\"q9f8bu\"\u003eMove away and reset.\u003c\/h2\u003e\n\u003ch2 data-end=\"25361\" data-start=\"25338\" data-section-id=\"cxp7xy\"\u003eRecord the result.\u003c\/h2\u003e\n\u003ch2 data-end=\"25386\" data-start=\"25362\" data-section-id=\"1ixk6pc\"\u003eExplain the system.\u003c\/h2\u003e\n\u003ch2 data-end=\"25410\" data-start=\"25387\" data-section-id=\"1e6rqbt\"\u003eBuild upon the idea.\u003c\/h2\u003e\n\u003cp data-end=\"25628\" data-start=\"25412\"\u003eThe \u003cstrong data-end=\"25455\" data-start=\"25416\"\u003eGo Science Obstacle Detection Alarm\u003c\/strong\u003e transforms invisible-light sensing, relay switching and road-safety concepts into a guided working experience students can observe, investigate and confidently demonstrate.\u003c\/p\u003e\n\u003chr data-end=\"25633\" data-start=\"25630\"\u003e\n\u003ch1 data-end=\"25680\" data-start=\"25635\" data-section-id=\"4evk91\"\u003eImportant Educational and Usage Information\u003c\/h1\u003e\n\u003cp data-end=\"25758\" data-start=\"25682\"\u003eThis product is an educational demonstration model and science teaching aid.\u003c\/p\u003e\n\u003cul data-end=\"26611\" data-start=\"25760\"\u003e\n\u003cli data-end=\"25806\" data-start=\"25760\" data-section-id=\"10qu1jp\"\u003eAdult or teacher supervision is recommended.\u003c\/li\u003e\n\u003cli data-end=\"25861\" data-start=\"25807\" data-section-id=\"6b16o0\"\u003eUse the model only on a flat, clean and dry surface.\u003c\/li\u003e\n\u003cli data-end=\"25947\" data-start=\"25862\" data-section-id=\"1rx3vqu\"\u003eUse only the supplied toy vehicles or other safe lightweight demonstration objects.\u003c\/li\u003e\n\u003cli data-end=\"25987\" data-start=\"25948\" data-section-id=\"u2wio0\"\u003eMove the vehicle manually and slowly.\u003c\/li\u003e\n\u003cli data-end=\"26041\" data-start=\"25988\" data-section-id=\"15n8715\"\u003eKeep the sensor lenses clean and correctly aligned.\u003c\/li\u003e\n\u003cli data-end=\"26130\" data-start=\"26042\" data-section-id=\"1rvtce4\"\u003eKeep the model away from direct sunlight and very bright light sources during testing.\u003c\/li\u003e\n\u003cli data-end=\"26172\" data-start=\"26131\" data-section-id=\"1h9m3ds\"\u003eDo not bend or force the sensor module.\u003c\/li\u003e\n\u003cli data-end=\"26218\" data-start=\"26173\" data-section-id=\"12iudcy\"\u003eKeep the buzzer and relay activation brief.\u003c\/li\u003e\n\u003cli data-end=\"26274\" data-start=\"26219\" data-section-id=\"re2v84\"\u003eConnect the 9V battery using the correct orientation.\u003c\/li\u003e\n\u003cli data-end=\"26338\" data-start=\"26275\" data-section-id=\"73rvoq\"\u003eDisconnect the battery immediately after every demonstration.\u003c\/li\u003e\n\u003cli data-end=\"26390\" data-start=\"26339\" data-section-id=\"1v5lqwc\"\u003eNever store the model with the battery connected.\u003c\/li\u003e\n\u003cli data-end=\"26434\" data-start=\"26391\" data-section-id=\"3kxznq\"\u003eStore the kit in a cool and dry location.\u003c\/li\u003e\n\u003cli data-end=\"26497\" data-start=\"26435\" data-section-id=\"114txdz\"\u003eInternet access is required for the online manual and video.\u003c\/li\u003e\n\u003cli data-end=\"26611\" data-start=\"26498\" data-section-id=\"4bw3sy\"\u003eProduct appearance and component arrangement may vary slightly due to manufacturing and component availability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"26644\" data-start=\"26613\" data-section-id=\"6f2uf4\"\u003eImportant Product Limitation\u003c\/h2\u003e\n\u003cp data-end=\"26731\" data-start=\"26646\"\u003eThis model demonstrates obstacle-triggered warning logic for educational observation.\u003c\/p\u003e\n\u003cp data-end=\"26743\" data-start=\"26733\"\u003eIt is not:\u003c\/p\u003e\n\u003cul data-end=\"27038\" data-start=\"26745\"\u003e\n\u003cli data-end=\"26774\" data-start=\"26745\" data-section-id=\"15wk61s\"\u003eAn automotive safety device\u003c\/li\u003e\n\u003cli data-end=\"26813\" data-start=\"26775\" data-section-id=\"1vz7t\"\u003eAn advanced driver-assistance system\u003c\/li\u003e\n\u003cli data-end=\"26852\" data-start=\"26814\" data-section-id=\"e3ljqq\"\u003eA certified collision-warning system\u003c\/li\u003e\n\u003cli data-end=\"26888\" data-start=\"26853\" data-section-id=\"12sfx80\"\u003eA parking sensor for installation\u003c\/li\u003e\n\u003cli data-end=\"26919\" data-start=\"26889\" data-section-id=\"hy5qfg\"\u003eAn autonomous-driving system\u003c\/li\u003e\n\u003cli data-end=\"26942\" data-start=\"26920\" data-section-id=\"1gkhmtr\"\u003eA braking controller\u003c\/li\u003e\n\u003cli data-end=\"26966\" data-start=\"26943\" data-section-id=\"jru4xs\"\u003eA steering controller\u003c\/li\u003e\n\u003cli data-end=\"26994\" data-start=\"26967\" data-section-id=\"1kra8h8\"\u003eA vehicle-stopping device\u003c\/li\u003e\n\u003cli data-end=\"27015\" data-start=\"26995\" data-section-id=\"1be34z8\"\u003eA road-use product\u003c\/li\u003e\n\u003cli data-end=\"27038\" data-start=\"27016\" data-section-id=\"1yy9shy\"\u003eA life-safety device\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"27259\" data-start=\"27040\"\u003eIt produces a warning only. It does not brake, steer, slow or stop a vehicle and must never be installed in or relied upon in a real vehicle.\u003c\/p\u003e","brand":"Go Science","offers":[{"title":"Default Title","offer_id":45648471621679,"sku":"2671814292801","price":649.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/4442\/3471\/files\/GO_Science_Classroom_Series_Obstacle_Detection_Alarm_kit_retail_box_of_School_project_demonstration_retail_box_with_kit_assembled.jpg?v=1784645746"},{"product_id":"rain-water-harvesting-and-rain-water-alarm-school-project-demonstration-kit-2in1","title":"Rain water harvesting \u0026 Rain Alarm school project \u0026 Water Conservation 2 in 1  demonstration kit go science classroom series","description":"\u003ch1 data-section-id=\"fnmrnq\" data-start=\"0\" data-end=\"43\" class=\"PDq2pG_selectionAnchorContainer\"\u003eRainwater Harvesting Model \u0026amp; Rain Alarm Go Science Classroom Series\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1ns7kq2\" data-start=\"44\" data-end=\"117\"\u003e2-in-1 Pre-Wired School Project \u0026amp; Water Conservation Demonstration Kit\u003c\/h2\u003e\n\u003ch3 data-section-id=\"14mvzvj\" data-start=\"119\" data-end=\"201\"\u003eDetect the rain. Hear the alert. Follow the water. See conservation in action.\u003c\/h3\u003e\n\u003cp data-start=\"203\" data-end=\"337\"\u003eTurn rain detection, electrical conductivity, gravity-driven water flow and water conservation into one connected learning experience.\u003c\/p\u003e\n\u003cp data-start=\"203\" data-end=\"337\"\u003e\u003ciframe width=\"1012\" height=\"569\" src=\"https:\/\/www.youtube.com\/embed\/kerRuEaY_4Q\" title=\"\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp data-start=\"339\" data-end=\"498\"\u003eThe \u003cstrong data-start=\"343\" data-end=\"414\"\u003eGo Science Classroom Series Rainwater Harvesting Model \u0026amp; Rain Alarm\u003c\/strong\u003e brings two complementary demonstrations together on one pre-wired working platform:\u003c\/p\u003e\n\u003ch3 data-section-id=\"1llbggz\" data-start=\"500\" data-end=\"525\"\u003eElectronic Rain Alarm\u003c\/h3\u003e\n\u003cp data-start=\"527\" data-end=\"613\"\u003eWater droplets reach the conductive rain-sensor plate and activate an audible warning.\u003c\/p\u003e\n\u003ch3 data-section-id=\"rsdjk7\" data-start=\"615\" data-end=\"645\"\u003eRainwater Harvesting Model\u003c\/h3\u003e\n\u003cp data-start=\"647\" data-end=\"774\"\u003eThe same water is collected from the roof area, channelled through a transparent pipe and directed into the model storage tank.\u003c\/p\u003e\n\u003cp data-start=\"776\" data-end=\"819\"\u003eStudents can observe the complete sequence:\u003c\/p\u003e\n\u003cp data-start=\"821\" data-end=\"903\"\u003e\u003cstrong data-start=\"821\" data-end=\"903\"\u003eDetect Rain → Sound the Alert → Collect the Water → Follow the Flow → Store It\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"905\" data-end=\"1123\"\u003eThe model combines sensor electronics with a visible water-management system, helping students understand both how rainfall can be detected and how rooftop runoff can be collected instead of being allowed to flow away.\u003c\/p\u003e\n\u003cp data-start=\"1125\" data-end=\"1384\"\u003eDesigned for \u003cstrong data-start=\"1138\" data-end=\"1153\"\u003eGrades 7–12\u003c\/strong\u003e, it is suitable for school projects, science exhibitions, classroom demonstrations, environmental-science activities and water-conservation presentations.\u003c\/p\u003e\n\u003ch1 data-section-id=\"z03tw8\" data-start=\"1391\" data-end=\"1436\"\u003eTwo Demonstrations. One Connected Platform.\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1boy43k\" data-start=\"1438\" data-end=\"1486\"\u003eExplore technology and conservation together.\u003c\/h2\u003e\n\u003cp data-start=\"1488\" data-end=\"1611\"\u003eThe 2-in-1 design allows students to observe two different scientific processes operating within the same contextual model.\u003c\/p\u003e\n\u003ch3 data-section-id=\"a3fgne\" data-start=\"1613\" data-end=\"1649\"\u003eRain Detection and Audible Alert\u003c\/h3\u003e\n\u003cp data-start=\"1651\" data-end=\"1821\"\u003eThe water-sensor plate contains exposed parallel conductive tracks. Under dry conditions, the electrical path between the tracks remains open and the buzzer stays silent.\u003c\/p\u003e\n\u003cp data-start=\"1823\" data-end=\"1967\"\u003eWhen water droplets bridge the tracks, the electrical condition changes and the connected active buzzer produces an audible rain-alert response.\u003c\/p\u003e\n\u003ch3 data-section-id=\"13abube\" data-start=\"1969\" data-end=\"2009\"\u003eCollection, Gravity Flow and Storage\u003c\/h3\u003e\n\u003cp data-start=\"2011\" data-end=\"2183\"\u003eWater applied to the roof and collection area is guided into the fitted collector tray. It then travels through the transparent hose pipe and enters the model storage tank.\u003c\/p\u003e\n\u003cp data-start=\"2185\" data-end=\"2310\"\u003eThe clear tube allows students to see the water moving through the system, making the harvesting process directly observable.\u003c\/p\u003e\n\u003cp data-start=\"2312\" data-end=\"2379\"\u003eTogether, the two demonstrations create a clear functional journey:\u003c\/p\u003e\n\u003cp data-start=\"2381\" data-end=\"2448\"\u003e\u003cstrong data-start=\"2381\" data-end=\"2448\"\u003eRainfall → Detection → Alert → Catchment → Conveyance → Storage\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch1 data-section-id=\"1hjr29d\" data-start=\"21664\" data-end=\"21684\"\u003eWhat’s in the pre assembled Kit?\u003c\/h1\u003e\n\u003cul data-start=\"21686\" data-end=\"22494\"\u003e\n\u003cli data-section-id=\"16xy4rb\" data-start=\"21686\" data-end=\"21723\"\u003ePre-wired water-sensor module plate\u003c\/li\u003e\n\u003cli data-section-id=\"6vm6m8\" data-start=\"21724\" data-end=\"21752\"\u003ePre-wired 5V active buzzer\u003c\/li\u003e\n\u003cli data-section-id=\"vj52rd\" data-start=\"21753\" data-end=\"21774\"\u003eHouse display model\u003c\/li\u003e\n\u003cli data-section-id=\"17et5gu\" data-start=\"21775\" data-end=\"21813\"\u003eRoof-integrated water collector tray\u003c\/li\u003e\n\u003cli data-section-id=\"fcsdy6\" data-start=\"21814\" data-end=\"21848\"\u003eTransparent fluid-flow hose pipe\u003c\/li\u003e\n\u003cli data-section-id=\"1vprj5p\" data-start=\"21849\" data-end=\"21885\"\u003eMiniature black model storage tank\u003c\/li\u003e\n\u003cli data-section-id=\"ednrwx\" data-start=\"21886\" data-end=\"21942\"\u003eInk filler or dropper for controlled water application\u003c\/li\u003e\n\u003cli data-section-id=\"1dkujop\" data-start=\"21943\" data-end=\"21975\"\u003ePre-connected electrical wires\u003c\/li\u003e\n\u003cli data-section-id=\"myf71m\" data-start=\"21976\" data-end=\"22000\"\u003eBattery snap connector\u003c\/li\u003e\n\u003cli data-section-id=\"vqvnw4\" data-start=\"22001\" data-end=\"22032\"\u003eWooden battery-mounting block\u003c\/li\u003e\n\u003cli data-section-id=\"26qhle\" data-start=\"22033\" data-end=\"22067\"\u003eDecorative artificial-grass base\u003c\/li\u003e\n\u003cli data-section-id=\"19u4i7m\" data-start=\"22068\" data-end=\"22108\"\u003eReady-to-use educational working model\u003c\/li\u003e\n\u003cli data-section-id=\"1a44xy5\" data-start=\"22109\" data-end=\"22151\"\u003eQR access to the detailed digital manual\u003c\/li\u003e\n\u003cli data-section-id=\"1h8mwo0\" data-start=\"22152\" data-end=\"22209\"\u003eDetailed 19-page full-colour digital instruction manual\u003c\/li\u003e\n\u003cli data-section-id=\"1gzewut\" data-start=\"22210\" data-end=\"22265\"\u003eQR access to the video demonstration from the kit box\u003c\/li\u003e\n\u003cli data-section-id=\"1nwy0n7\" data-start=\"22266\" data-end=\"22294\"\u003eStep-by-step working video\u003c\/li\u003e\n\u003cli data-section-id=\"1qrzs62\" data-start=\"22295\" data-end=\"22331\"\u003eIllustrated component explanations\u003c\/li\u003e\n\u003cli data-section-id=\"1f9utue\" data-start=\"22332\" data-end=\"22364\"\u003eElectronic rain-alarm guidance\u003c\/li\u003e\n\u003cli data-section-id=\"15q0y97\" data-start=\"22365\" data-end=\"22400\"\u003eRainwater-harvesting explanations\u003c\/li\u003e\n\u003cli data-section-id=\"1cj0qo2\" data-start=\"22401\" data-end=\"22438\"\u003eTesting and troubleshooting support\u003c\/li\u003e\n\u003cli data-section-id=\"bqr02h\" data-start=\"22439\" data-end=\"22478\"\u003eSafety, cleaning and storage guidance\u003c\/li\u003e\n\u003cli data-section-id=\"1rf3i7h\" data-start=\"22479\" data-end=\"22494\"\u003eConcept recap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"22496\" data-end=\"22765\"\u003eThe box artwork and manuals confirm the sensor, buzzer, roof collector, transparent pipe, model tank, dropper, battery connector and digital-manual access.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1rc8kfz\" data-start=\"22772\" data-end=\"22793\"\u003eRequired Separately\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1kc5asn\" data-start=\"22795\" data-end=\"22808\"\u003e9V Battery\u003c\/h2\u003e\n\u003cp data-start=\"22810\" data-end=\"22850\"\u003eThe model requires one fresh 9V battery.\u003c\/p\u003e\n\u003cp data-start=\"22852\" data-end=\"22880\"\u003e\u003cstrong data-start=\"22852\" data-end=\"22880\"\u003eBattery is not included.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 data-section-id=\"mh7hzp\" data-start=\"22882\" data-end=\"22896\"\u003eClean Water\u003c\/h2\u003e\n\u003cp data-start=\"22898\" data-end=\"22964\"\u003eA small quantity of clean water is required for the demonstration.\u003c\/p\u003e\n\u003cp data-start=\"22966\" data-end=\"23005\"\u003e\u003cstrong data-start=\"22966\" data-end=\"23005\"\u003eWater is not supplied with the kit.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"23007\" data-end=\"23074\"\u003eUse only small, controlled quantities through the included dropper.\u003c\/p\u003e\n\u003ch1 data-section-id=\"nh62sj\" data-start=\"23081\" data-end=\"23105\"\u003eProduct Specifications\u003c\/h1\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"23107\" data-end=\"23936\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"23107\" data-end=\"23134\"\u003e\n\u003ctr data-start=\"23107\" data-end=\"23134\"\u003e\n\u003cth data-start=\"23107\" data-end=\"23123\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"23123\" data-end=\"23134\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"23145\" data-end=\"23936\"\u003e\n\u003ctr data-start=\"23145\" data-end=\"23196\"\u003e\n\u003ctd data-start=\"23145\" data-end=\"23160\" data-col-size=\"sm\"\u003eProduct type\u003c\/td\u003e\n\u003ctd data-start=\"23160\" data-end=\"23196\" data-col-size=\"sm\"\u003e2-in-1 educational working model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23197\" data-end=\"23233\"\u003e\n\u003ctd data-start=\"23197\" data-end=\"23218\" data-col-size=\"sm\"\u003eRecommended grades\u003c\/td\u003e\n\u003ctd data-start=\"23218\" data-end=\"23233\" data-col-size=\"sm\"\u003eGrades 7–12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23234\" data-end=\"23277\"\u003e\n\u003ctd data-start=\"23234\" data-end=\"23252\" data-col-size=\"sm\"\u003eDemonstration 1\u003c\/td\u003e\n\u003ctd data-start=\"23252\" data-end=\"23277\" data-col-size=\"sm\"\u003eElectronic rain alarm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23278\" data-end=\"23332\"\u003e\n\u003ctd data-start=\"23278\" data-end=\"23296\" data-col-size=\"sm\"\u003eDemonstration 2\u003c\/td\u003e\n\u003ctd data-start=\"23296\" data-end=\"23332\" data-col-size=\"sm\"\u003eRainwater harvesting and storage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23333\" data-end=\"23383\"\u003e\n\u003ctd data-start=\"23333\" data-end=\"23350\" data-col-size=\"sm\"\u003ePrimary sensor\u003c\/td\u003e\n\u003ctd data-start=\"23350\" data-end=\"23383\" data-col-size=\"sm\"\u003eConductive water-sensor plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23384\" data-end=\"23419\"\u003e\n\u003ctd data-start=\"23384\" data-end=\"23399\" data-col-size=\"sm\"\u003eAlert output\u003c\/td\u003e\n\u003ctd data-start=\"23399\" data-end=\"23419\" data-col-size=\"sm\"\u003e5V active buzzer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23420\" data-end=\"23473\"\u003e\n\u003ctd data-start=\"23420\" data-end=\"23439\" data-col-size=\"sm\"\u003eCatchment system\u003c\/td\u003e\n\u003ctd data-start=\"23439\" data-end=\"23473\" data-col-size=\"sm\"\u003eRoof-integrated collector tray\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23474\" data-end=\"23514\"\u003e\n\u003ctd data-start=\"23474\" data-end=\"23489\" data-col-size=\"sm\"\u003eFlow display\u003c\/td\u003e\n\u003ctd data-start=\"23489\" data-end=\"23514\" data-col-size=\"sm\"\u003eTransparent hose pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23515\" data-end=\"23557\"\u003e\n\u003ctd data-start=\"23515\" data-end=\"23533\" data-col-size=\"sm\"\u003eStorage display\u003c\/td\u003e\n\u003ctd data-start=\"23533\" data-end=\"23557\" data-col-size=\"sm\"\u003eMiniature model tank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23558\" data-end=\"23603\"\u003e\n\u003ctd data-start=\"23558\" data-end=\"23583\" data-col-size=\"sm\"\u003eWater application tool\u003c\/td\u003e\n\u003ctd data-start=\"23583\" data-end=\"23603\" data-col-size=\"sm\"\u003eDropper included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23604\" data-end=\"23633\"\u003e\n\u003ctd data-start=\"23604\" data-end=\"23627\" data-col-size=\"sm\"\u003eRainfall measurement\u003c\/td\u003e\n\u003ctd data-start=\"23627\" data-end=\"23633\" data-col-size=\"sm\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23634\" data-end=\"23662\"\u003e\n\u003ctd data-start=\"23634\" data-end=\"23656\" data-col-size=\"sm\"\u003eFiltration function\u003c\/td\u003e\n\u003ctd data-start=\"23656\" data-end=\"23662\" data-col-size=\"sm\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23663\" data-end=\"23700\"\u003e\n\u003ctd data-start=\"23663\" data-end=\"23682\" data-col-size=\"sm\"\u003eBattery required\u003c\/td\u003e\n\u003ctd data-start=\"23682\" data-end=\"23700\" data-col-size=\"sm\"\u003eOne 9V battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23701\" data-end=\"23726\"\u003e\n\u003ctd data-start=\"23701\" data-end=\"23720\" data-col-size=\"sm\"\u003eBattery included\u003c\/td\u003e\n\u003ctd data-start=\"23720\" data-end=\"23726\" data-col-size=\"sm\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23727\" data-end=\"23774\"\u003e\n\u003ctd data-start=\"23727\" data-end=\"23744\" data-col-size=\"sm\"\u003eDigital manual\u003c\/td\u003e\n\u003ctd data-start=\"23744\" data-end=\"23774\" data-col-size=\"sm\"\u003eIncluded through QR access\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23775\" data-end=\"23836\"\u003e\n\u003ctd data-start=\"23775\" data-end=\"23797\" data-col-size=\"sm\"\u003eVideo demonstration\u003c\/td\u003e\n\u003ctd data-start=\"23797\" data-end=\"23836\" data-col-size=\"sm\"\u003eProduct gallery, YouTube and box QR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23837\" data-end=\"23880\"\u003e\n\u003ctd data-start=\"23837\" data-end=\"23862\" data-col-size=\"sm\"\u003eApproximate dimensions\u003c\/td\u003e\n\u003ctd data-start=\"23862\" data-end=\"23880\" data-col-size=\"sm\"\u003e16 × 11 × 8 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"23881\" data-end=\"23936\"\u003e\n\u003ctd data-start=\"23881\" data-end=\"23896\" data-col-size=\"sm\"\u003eIntended use\u003c\/td\u003e\n\u003ctd data-start=\"23896\" data-end=\"23936\" data-col-size=\"sm\"\u003eSupervised educational demonstration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"23938\" data-end=\"24076\"\u003eProduct appearance, colours, component placement and pipe routing may vary slightly according to manufacturing and component availability.\u003c\/p\u003e\n\u003ch1 data-section-id=\"cdsp2y\" data-start=\"2455\" data-end=\"2494\"\u003eA Complete Guided Learning Experience\u003c\/h1\u003e\n\u003ch2 data-section-id=\"v4iz4g\" data-start=\"2496\" data-end=\"2571\"\u003eWorking model, full-colour manual and video demonstration—all connected.\u003c\/h2\u003e\n\u003cp data-start=\"2573\" data-end=\"2791\"\u003eEvery Go Science Classroom Series kit is supported by guided learning resources that help students understand the concept, prepare the activity, conduct the demonstration and explain their observations with confidence.\u003c\/p\u003e\n\u003cp data-start=\"2793\" data-end=\"2821\"\u003eThis kit includes access to:\u003c\/p\u003e\n\u003cul data-start=\"2823\" data-end=\"3213\"\u003e\n\u003cli data-section-id=\"12k1qd3\" data-start=\"2823\" data-end=\"2874\"\u003eA detailed full-colour digital instruction manual\u003c\/li\u003e\n\u003cli data-section-id=\"1qrzs62\" data-start=\"2875\" data-end=\"2911\"\u003eIllustrated component explanations\u003c\/li\u003e\n\u003cli data-section-id=\"hj0pyw\" data-start=\"2912\" data-end=\"2945\"\u003eStep-by-step operating guidance\u003c\/li\u003e\n\u003cli data-section-id=\"1x82f7k\" data-start=\"2946\" data-end=\"2982\"\u003eElectronic rain-alarm explanations\u003c\/li\u003e\n\u003cli data-section-id=\"svqzll\" data-start=\"2983\" data-end=\"3035\"\u003eRainwater-harvesting and gravity-flow explanations\u003c\/li\u003e\n\u003cli data-section-id=\"61qkjs\" data-start=\"3036\" data-end=\"3079\"\u003eSafety, care and troubleshooting guidance\u003c\/li\u003e\n\u003cli data-section-id=\"1j0us4n\" data-start=\"3080\" data-end=\"3121\"\u003eA dedicated working video demonstration\u003c\/li\u003e\n\u003cli data-section-id=\"13qxli2\" data-start=\"3122\" data-end=\"3167\"\u003eQR access to the digital learning resources\u003c\/li\u003e\n\u003cli data-section-id=\"uyc0um\" data-start=\"3168\" data-end=\"3213\"\u003eLearning recap and project-support material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3215\" data-end=\"3273\"\u003eThe learning journey is designed to take students through:\u003c\/p\u003e\n\u003cp data-start=\"3275\" data-end=\"3355\"\u003e\u003cstrong data-start=\"3275\" data-end=\"3355\"\u003eExplore → Understand → Watch → Prepare → Test → Observe → Explain → Complete\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"3357\" data-end=\"3557\"\u003eStudents can read the manual, watch the actual model in operation and return to both resources while preparing for a school presentation, project report, science exhibition or classroom demonstration.\u003c\/p\u003e\n\u003ch1 data-section-id=\"uc35dk\" data-start=\"3564\" data-end=\"3610\"\u003eDetailed Full-Colour Digital Manual Included\u003c\/h1\u003e\n\u003ch2 data-section-id=\"gb47iv\" data-start=\"3612\" data-end=\"3657\"\u003eScan, explore and revisit whenever needed.\u003c\/h2\u003e\n\u003cp data-start=\"3659\" data-end=\"3815\"\u003eA QR code supplied with the kit provides access to a dedicated digital learning manual created specifically for the Rainwater Harvesting Model \u0026amp; Rain Alarm.\u003c\/p\u003e\n\u003cp data-start=\"3817\" data-end=\"3889\"\u003eThe manual can be opened on a phone, tablet or computer and used during:\u003c\/p\u003e\n\u003cul data-start=\"3891\" data-end=\"4115\"\u003e\n\u003cli data-section-id=\"15f03x6\" data-start=\"3891\" data-end=\"3920\"\u003eInitial project preparation\u003c\/li\u003e\n\u003cli data-section-id=\"8wns25\" data-start=\"3921\" data-end=\"3947\"\u003eComponent identification\u003c\/li\u003e\n\u003cli data-section-id=\"12y2z1m\" data-start=\"3948\" data-end=\"3969\"\u003eDemonstration setup\u003c\/li\u003e\n\u003cli data-section-id=\"12uzkgd\" data-start=\"3970\" data-end=\"3990\"\u003eClassroom learning\u003c\/li\u003e\n\u003cli data-section-id=\"1bnwkld\" data-start=\"3991\" data-end=\"4020\"\u003eScience-exhibition practice\u003c\/li\u003e\n\u003cli data-section-id=\"4tplyf\" data-start=\"4021\" data-end=\"4049\"\u003eProject-report preparation\u003c\/li\u003e\n\u003cli data-section-id=\"15rfreh\" data-start=\"4050\" data-end=\"4068\"\u003eViva preparation\u003c\/li\u003e\n\u003cli data-section-id=\"z1z1u8\" data-start=\"4069\" data-end=\"4086\"\u003eTroubleshooting\u003c\/li\u003e\n\u003cli data-section-id=\"1j1lfo5\" data-start=\"4087\" data-end=\"4115\"\u003eRevision and concept recap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4117\" data-end=\"4219\"\u003eThe current manual contains \u003cstrong data-start=\"4145\" data-end=\"4179\"\u003e19 colourful illustrated pages\u003c\/strong\u003e covering the complete learning journey.\u003c\/p\u003e\n\u003cp data-start=\"4221\" data-end=\"4233\"\u003eIt includes:\u003c\/p\u003e\n\u003cul data-start=\"4235\" data-end=\"4779\"\u003e\n\u003cli data-section-id=\"im5wry\" data-start=\"4235\" data-end=\"4272\"\u003eAn introduction to the 2-in-1 model\u003c\/li\u003e\n\u003cli data-section-id=\"shvfiz\" data-start=\"4273\" data-end=\"4316\"\u003eA visual guide to the supplied components\u003c\/li\u003e\n\u003cli data-section-id=\"1w6izlj\" data-start=\"4317\" data-end=\"4358\"\u003eThe complete four-step working sequence\u003c\/li\u003e\n\u003cli data-section-id=\"5v4ocs\" data-start=\"4359\" data-end=\"4404\"\u003eWater-sensor and active-buzzer explanations\u003c\/li\u003e\n\u003cli data-section-id=\"1nxjtrx\" data-start=\"4405\" data-end=\"4446\"\u003eStep-by-step demonstration instructions\u003c\/li\u003e\n\u003cli data-section-id=\"9prvlx\" data-start=\"4447\" data-end=\"4482\"\u003eOpen- and closed-circuit concepts\u003c\/li\u003e\n\u003cli data-section-id=\"44el1h\" data-start=\"4483\" data-end=\"4517\"\u003eElectrical conductivity of water\u003c\/li\u003e\n\u003cli data-section-id=\"1wnmu8g\" data-start=\"4518\" data-end=\"4558\"\u003eRooftop catchment and water collection\u003c\/li\u003e\n\u003cli data-section-id=\"pdt6ui\" data-start=\"4559\" data-end=\"4613\"\u003eGravity-driven movement through the transparent pipe\u003c\/li\u003e\n\u003cli data-section-id=\"3if9l2\" data-start=\"4614\" data-end=\"4648\"\u003eModel-tank storage demonstration\u003c\/li\u003e\n\u003cli data-section-id=\"1bfeb52\" data-start=\"4649\" data-end=\"4675\"\u003eTroubleshooting guidance\u003c\/li\u003e\n\u003cli data-section-id=\"294w3b\" data-start=\"4676\" data-end=\"4719\"\u003eCleaning, drying and storage instructions\u003c\/li\u003e\n\u003cli data-section-id=\"7rai30\" data-start=\"4720\" data-end=\"4753\"\u003eFun facts and technical details\u003c\/li\u003e\n\u003cli data-section-id=\"18leak0\" data-start=\"4754\" data-end=\"4779\"\u003eComplete learning recap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4781\" data-end=\"5190\"\u003eThe kit contents and dimensions are presented on page 5, the four-step system sequence on page 6, component explanations on page 7, preparation and testing on pages 8–10, the electronic rain-alarm concept on page 11, mechanical harvesting on page 12, troubleshooting on page 13, cleaning and storage on page 14, learning facts on page 15 and the concept recap on page 16.\u003c\/p\u003e\n\u003ch1 data-section-id=\"19mroy9\" data-start=\"5197\" data-end=\"5240\"\u003eStep-by-Step Video Demonstration Included\u003c\/h1\u003e\n\u003ch2 data-section-id=\"5vinub\" data-start=\"5242\" data-end=\"5299\"\u003eWatch the actual model before conducting the activity.\u003c\/h2\u003e\n\u003cp data-start=\"5301\" data-end=\"5430\"\u003eEvery kit also provides access to a dedicated working video showing the physical product and its complete demonstration sequence.\u003c\/p\u003e\n\u003cp data-start=\"5432\" data-end=\"5480\"\u003eThe video helps students and parents understand:\u003c\/p\u003e\n\u003cul data-start=\"5482\" data-end=\"5870\"\u003e\n\u003cli data-section-id=\"clqf9l\" data-start=\"5482\" data-end=\"5516\"\u003eThe complete 2-in-1 model layout\u003c\/li\u003e\n\u003cli data-section-id=\"xlbcya\" data-start=\"5517\" data-end=\"5540\"\u003eThe rain-sensor plate\u003c\/li\u003e\n\u003cli data-section-id=\"10y73oi\" data-start=\"5541\" data-end=\"5582\"\u003eThe active buzzer and pre-wired circuit\u003c\/li\u003e\n\u003cli data-section-id=\"1gur4dl\" data-start=\"5583\" data-end=\"5620\"\u003eThe roof-integrated water collector\u003c\/li\u003e\n\u003cli data-section-id=\"8e5cy1\" data-start=\"5621\" data-end=\"5648\"\u003eThe transparent flow pipe\u003c\/li\u003e\n\u003cli data-section-id=\"devl93\" data-start=\"5649\" data-end=\"5673\"\u003eThe model storage tank\u003c\/li\u003e\n\u003cli data-section-id=\"1vx5a0d\" data-start=\"5674\" data-end=\"5702\"\u003eCorrect battery connection\u003c\/li\u003e\n\u003cli data-section-id=\"1epq138\" data-start=\"5703\" data-end=\"5736\"\u003eControlled application of water\u003c\/li\u003e\n\u003cli data-section-id=\"2oml8r\" data-start=\"5737\" data-end=\"5767\"\u003eActivation of the rain alarm\u003c\/li\u003e\n\u003cli data-section-id=\"4aeyk9\" data-start=\"5768\" data-end=\"5804\"\u003eMovement of water through the pipe\u003c\/li\u003e\n\u003cli data-section-id=\"1kj3ajb\" data-start=\"5805\" data-end=\"5842\"\u003eCollection of water inside the tank\u003c\/li\u003e\n\u003cli data-section-id=\"dzi5wa\" data-start=\"5843\" data-end=\"5870\"\u003eSafe shutdown and cleanup\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"5872\" data-end=\"5923\"\u003eThe video can be accessed in three convenient ways:\u003c\/p\u003e\n\u003ch3 data-section-id=\"1nmiu3p\" data-start=\"5925\" data-end=\"5944\"\u003eProduct Gallery\u003c\/h3\u003e\n\u003cp data-start=\"5946\" data-end=\"6123\"\u003eThe video is included alongside the product photographs on the Go Science product page, allowing parents, teachers and students to view the actual working model before purchase.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1iuekfw\" data-start=\"6125\" data-end=\"6155\"\u003eGo Science YouTube Channel\u003c\/h3\u003e\n\u003cp data-start=\"6157\" data-end=\"6296\"\u003eThe complete demonstration is also available through the official Go Science YouTube presence for convenient viewing, revision and sharing.\u003c\/p\u003e\n\u003ch3 data-section-id=\"mu6kxf\" data-start=\"6298\" data-end=\"6324\"\u003eQR Code on the Kit Box\u003c\/h3\u003e\n\u003cp data-start=\"6326\" data-end=\"6486\"\u003eA QR code printed on the side of the kit box provides quick access to the demonstration video whenever students need to revisit the setup or operating sequence.\u003c\/p\u003e\n\u003cp data-start=\"6488\" data-end=\"6532\"\u003eThis creates a continuous guided experience:\u003c\/p\u003e\n\u003cp data-start=\"6534\" data-end=\"6584\"\u003e\u003cstrong data-start=\"6534\" data-end=\"6584\"\u003eScan → Watch → Prepare → Demonstrate → Rewatch\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"6586\" data-end=\"6680\"\u003eInternet access and a compatible QR-scanning device are required to open the online resources.\u003c\/p\u003e\n\u003ch1 data-section-id=\"c01vee\" data-start=\"6687\" data-end=\"6721\"\u003ePre-Wired for Direct Exploration\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1sfjur0\" data-start=\"6723\" data-end=\"6767\"\u003eBegin with a complete working foundation.\u003c\/h2\u003e\n\u003cp data-start=\"6769\" data-end=\"6906\"\u003eThe rain-sensor plate, active buzzer, battery connector and electrical connections are integrated into the model as one pre-wired system.\u003c\/p\u003e\n\u003cp data-start=\"6908\" data-end=\"7024\"\u003eThe water collector, transparent hose pipe and storage tank are also positioned as one connected physical flow path.\u003c\/p\u003e\n\u003cp data-start=\"7026\" data-end=\"7111\"\u003eThis working foundation allows students to move directly into meaningful exploration:\u003c\/p\u003e\n\u003cul data-start=\"7113\" data-end=\"7561\"\u003e\n\u003cli data-section-id=\"opnu7y\" data-start=\"7113\" data-end=\"7159\"\u003eObserve how water changes the sensor circuit\u003c\/li\u003e\n\u003cli data-section-id=\"5mx8l7\" data-start=\"7160\" data-end=\"7190\"\u003eHear the rain-alert response\u003c\/li\u003e\n\u003cli data-section-id=\"tyutb0\" data-start=\"7191\" data-end=\"7227\"\u003eFollow the water from roof to tank\u003c\/li\u003e\n\u003cli data-section-id=\"v2nji4\" data-start=\"7228\" data-end=\"7255\"\u003eStudy gravity-driven flow\u003c\/li\u003e\n\u003cli data-section-id=\"mvuwm3\" data-start=\"7256\" data-end=\"7295\"\u003eCompare dry and wet sensor conditions\u003c\/li\u003e\n\u003cli data-section-id=\"1cwwly9\" data-start=\"7296\" data-end=\"7325\"\u003eRun repeated demonstrations\u003c\/li\u003e\n\u003cli data-section-id=\"3w69jr\" data-start=\"7326\" data-end=\"7361\"\u003eChange the quantity of water used\u003c\/li\u003e\n\u003cli data-section-id=\"13rj2e0\" data-start=\"7362\" data-end=\"7395\"\u003eRecord and compare observations\u003c\/li\u003e\n\u003cli data-section-id=\"6lor30\" data-start=\"7396\" data-end=\"7435\"\u003eInvestigate leaks or interrupted flow\u003c\/li\u003e\n\u003cli data-section-id=\"9vzaey\" data-start=\"7436\" data-end=\"7476\"\u003eUnderstand the role of every component\u003c\/li\u003e\n\u003cli data-section-id=\"1u3le97\" data-start=\"7477\" data-end=\"7518\"\u003eExplain both demonstrations confidently\u003c\/li\u003e\n\u003cli data-section-id=\"ryuwj0\" data-start=\"7519\" data-end=\"7561\"\u003eDevelop further water-conservation ideas\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"7563\" data-end=\"7591\"\u003eThe model is designed to be:\u003c\/p\u003e\n\u003cp data-start=\"7593\" data-end=\"7663\"\u003e\u003cstrong data-start=\"7593\" data-end=\"7663\"\u003eObserved → Tested → Retested → Understood → Explained → Built Upon\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch1 data-section-id=\"19y3zfv\" data-start=\"7670\" data-end=\"7705\"\u003eWatch the Complete System Respond\u003c\/h1\u003e\n\u003ch2 data-section-id=\"13ef0wd\" data-start=\"7707\" data-end=\"7730\"\u003e1. Prepare the Model\u003c\/h2\u003e\n\u003cp data-start=\"7732\" data-end=\"7793\"\u003ePlace the model on a flat, stable and completely dry surface.\u003c\/p\u003e\n\u003cp data-start=\"7795\" data-end=\"7806\"\u003eCheck that:\u003c\/p\u003e\n\u003cul data-start=\"7808\" data-end=\"8015\"\u003e\n\u003cli data-section-id=\"zoo32f\" data-start=\"7808\" data-end=\"7838\"\u003eThe rain-sensor plate is dry\u003c\/li\u003e\n\u003cli data-section-id=\"ujw7co\" data-start=\"7839\" data-end=\"7870\"\u003eThe transparent pipe is clear\u003c\/li\u003e\n\u003cli data-section-id=\"1orujs5\" data-start=\"7871\" data-end=\"7915\"\u003eThe collector tray is correctly positioned\u003c\/li\u003e\n\u003cli data-section-id=\"mo2duf\" data-start=\"7916\" data-end=\"7943\"\u003eThe storage tank is empty\u003c\/li\u003e\n\u003cli data-section-id=\"ybsi9v\" data-start=\"7944\" data-end=\"7980\"\u003eThe electrical connections are dry\u003c\/li\u003e\n\u003cli data-section-id=\"1dv24is\" data-start=\"7981\" data-end=\"8015\"\u003eThe battery is not yet connected\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1mn0vmp\" data-start=\"8017\" data-end=\"8040\"\u003e2. Connect the Power\u003c\/h2\u003e\n\u003cp data-start=\"8042\" data-end=\"8148\"\u003eCarefully attach a fresh 9V battery to the supplied snap connector using the correct terminal orientation.\u003c\/p\u003e\n\u003cp data-start=\"8150\" data-end=\"8204\"\u003eUnder dry conditions, the buzzer should remain silent.\u003c\/p\u003e\n\u003ch2 data-section-id=\"17shmio\" data-start=\"8206\" data-end=\"8227\"\u003e3. Apply the Water\u003c\/h2\u003e\n\u003cp data-start=\"8229\" data-end=\"8309\"\u003eUse the supplied dropper to collect a small, controlled quantity of clean water.\u003c\/p\u003e\n\u003cp data-start=\"8311\" data-end=\"8384\"\u003eApply the water carefully to the exposed sensor and roof-collection area.\u003c\/p\u003e\n\u003ch2 data-section-id=\"144mdpx\" data-start=\"8386\" data-end=\"8407\"\u003e4. Detect the Rain\u003c\/h2\u003e\n\u003cp data-start=\"8409\" data-end=\"8471\"\u003eThe water reaches the exposed conductive tracks of the sensor.\u003c\/p\u003e\n\u003cp data-start=\"8473\" data-end=\"8585\"\u003eAs the droplets bridge the tracks, the electrical path changes from an open condition to a conducting condition.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1dimbai\" data-start=\"8587\" data-end=\"8608\"\u003e5. Sound the Alert\u003c\/h2\u003e\n\u003cp data-start=\"8610\" data-end=\"8691\"\u003eThe connected active buzzer receives the trigger and produces an audible warning.\u003c\/p\u003e\n\u003cp data-start=\"8693\" data-end=\"8744\"\u003eThis represents the electronic rain-alarm function.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1k24ulr\" data-start=\"8746\" data-end=\"8769\"\u003e6. Collect the Water\u003c\/h2\u003e\n\u003cp data-start=\"8771\" data-end=\"8848\"\u003eThe applied water moves from the roof profile into the fitted collector tray.\u003c\/p\u003e\n\u003cp data-start=\"8850\" data-end=\"8912\"\u003eThe tray gathers the runoff and directs it towards the outlet.\u003c\/p\u003e\n\u003ch2 data-section-id=\"7j55wg\" data-start=\"8914\" data-end=\"8943\"\u003e7. Follow the Gravity Flow\u003c\/h2\u003e\n\u003cp data-start=\"8945\" data-end=\"8993\"\u003eWater travels through the transparent hose pipe.\u003c\/p\u003e\n\u003cp data-start=\"8995\" data-end=\"9079\"\u003eStudents can watch it move from the higher roof area towards the lower storage tank.\u003c\/p\u003e\n\u003ch2 data-section-id=\"jw47xc\" data-start=\"9081\" data-end=\"9102\"\u003e8. Store the Water\u003c\/h2\u003e\n\u003cp data-start=\"9104\" data-end=\"9170\"\u003eThe water exits the pipe and collects inside the black model tank.\u003c\/p\u003e\n\u003cp data-start=\"9172\" data-end=\"9247\"\u003eThis represents the storage stage of a rooftop rainwater-harvesting system.\u003c\/p\u003e\n\u003ch2 data-section-id=\"dvlzbl\" data-start=\"9249\" data-end=\"9270\"\u003e9. Reset the Model\u003c\/h2\u003e\n\u003cp data-start=\"9272\" data-end=\"9331\"\u003eDisconnect the battery immediately after the demonstration.\u003c\/p\u003e\n\u003cp data-start=\"9333\" data-end=\"9418\"\u003eEmpty the storage tank, drain the pipe and wipe the rain-sensor plate completely dry.\u003c\/p\u003e\n\u003cp data-start=\"9420\" data-end=\"9528\"\u003eOnce the sensor tracks are dry, the circuit returns to its original condition and the buzzer remains silent.\u003c\/p\u003e\n\u003cp data-start=\"9530\" data-end=\"9555\"\u003eThe complete sequence is:\u003c\/p\u003e\n\u003cp data-start=\"9557\" data-end=\"9645\"\u003e\u003cstrong data-start=\"9557\" data-end=\"9645\"\u003eWater Detected → Buzzer Sounds → Water Collected → Gravity Moves It → Tank Stores It\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"9647\" data-end=\"9824\"\u003eThe supplied manuals and box artwork confirm the two-part electronic and mechanical working sequence.\u003c\/p\u003e\n\u003chr data-start=\"9826\" data-end=\"9829\"\u003e\n\u003ch1 data-section-id=\"1195bhf\" data-start=\"9831\" data-end=\"9866\"\u003eExplore the Electronic Rain Alarm\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1o0cafo\" data-start=\"9868\" data-end=\"9917\"\u003eSee how water can complete an electrical path.\u003c\/h2\u003e\n\u003cp data-start=\"9919\" data-end=\"9985\"\u003eThe rain-sensor plate contains parallel exposed conductive tracks.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1npclq2\" data-start=\"9987\" data-end=\"10004\"\u003eDry Condition\u003c\/h3\u003e\n\u003cp data-start=\"10006\" data-end=\"10071\"\u003eWhen the plate is dry, air occupies the space between the tracks.\u003c\/p\u003e\n\u003cp data-start=\"10073\" data-end=\"10178\"\u003eAir provides high electrical resistance, so the electrical path remains open and the buzzer stays silent.\u003c\/p\u003e\n\u003ch3 data-section-id=\"11lg8er\" data-start=\"10180\" data-end=\"10197\"\u003eWet Condition\u003c\/h3\u003e\n\u003cp data-start=\"10199\" data-end=\"10278\"\u003eWhen water droplets spread across the plate, they bridge the conductive tracks.\u003c\/p\u003e\n\u003cp data-start=\"10280\" data-end=\"10382\"\u003eThe water creates a path that changes the circuit condition and activates the pre-wired active buzzer.\u003c\/p\u003e\n\u003cp data-start=\"10384\" data-end=\"10405\"\u003eStudents can explore:\u003c\/p\u003e\n\u003cul data-start=\"10407\" data-end=\"10694\"\u003e\n\u003cli data-section-id=\"dke3gt\" data-start=\"10407\" data-end=\"10433\"\u003eRain and water detection\u003c\/li\u003e\n\u003cli data-section-id=\"1w7k2qi\" data-start=\"10434\" data-end=\"10463\"\u003eOpen and completed circuits\u003c\/li\u003e\n\u003cli data-section-id=\"f3evmn\" data-start=\"10464\" data-end=\"10491\"\u003eConductors and insulators\u003c\/li\u003e\n\u003cli data-section-id=\"78w739\" data-start=\"10492\" data-end=\"10515\"\u003eElectrical resistance\u003c\/li\u003e\n\u003cli data-section-id=\"l3m4gs\" data-start=\"10516\" data-end=\"10542\"\u003eConductive sensor tracks\u003c\/li\u003e\n\u003cli data-section-id=\"1drqp0h\" data-start=\"10543\" data-end=\"10569\"\u003eInput and output devices\u003c\/li\u003e\n\u003cli data-section-id=\"1l6lz6w\" data-start=\"10570\" data-end=\"10588\"\u003eAutomatic alerts\u003c\/li\u003e\n\u003cli data-section-id=\"16n9fke\" data-start=\"10589\" data-end=\"10609\"\u003eWet and dry states\u003c\/li\u003e\n\u003cli data-section-id=\"oed5wi\" data-start=\"10610\" data-end=\"10642\"\u003eCause-and-effect relationships\u003c\/li\u003e\n\u003cli data-section-id=\"13d4due\" data-start=\"10643\" data-end=\"10694\"\u003eElectronic response to an environmental condition\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"10696\" data-end=\"10847\"\u003eThis model demonstrates the \u003cstrong data-start=\"10724\" data-end=\"10765\"\u003epresence of water on the sensor plate\u003c\/strong\u003e. It does not measure rainfall quantity, rainfall intensity or weather conditions.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1xfy15c\" data-start=\"10854\" data-end=\"10895\"\u003eFollow the Rainwater Harvesting Journey\u003c\/h1\u003e\n\u003ch2 data-section-id=\"16st4p3\" data-start=\"10897\" data-end=\"10941\"\u003eSee water move from catchment to storage.\u003c\/h2\u003e\n\u003cp data-start=\"10943\" data-end=\"11016\"\u003eThe physical harvesting section makes the complete water pathway visible.\u003c\/p\u003e\n\u003ch3 data-section-id=\"clyf3d\" data-start=\"11018\" data-end=\"11031\"\u003eCatchment\u003c\/h3\u003e\n\u003cp data-start=\"11033\" data-end=\"11094\"\u003eThe model roof represents the surface that receives rainfall.\u003c\/p\u003e\n\u003ch3 data-section-id=\"16vcmog\" data-start=\"11096\" data-end=\"11110\"\u003eCollection\u003c\/h3\u003e\n\u003cp data-start=\"11112\" data-end=\"11172\"\u003eThe fitted tray gathers water running from the roof profile.\u003c\/p\u003e\n\u003ch3 data-section-id=\"r6hl9j\" data-start=\"11174\" data-end=\"11188\"\u003eConveyance\u003c\/h3\u003e\n\u003cp data-start=\"11190\" data-end=\"11260\"\u003eThe outlet directs the collected water into the transparent hose pipe.\u003c\/p\u003e\n\u003ch3 data-section-id=\"15u37oy\" data-start=\"11262\" data-end=\"11278\"\u003eGravity Flow\u003c\/h3\u003e\n\u003cp data-start=\"11280\" data-end=\"11351\"\u003eGravity pulls the water down through the pipe without requiring a pump.\u003c\/p\u003e\n\u003ch3 data-section-id=\"w9x5of\" data-start=\"11353\" data-end=\"11364\"\u003eStorage\u003c\/h3\u003e\n\u003cp data-start=\"11366\" data-end=\"11442\"\u003eThe water enters the black model tank, representing collected-water storage.\u003c\/p\u003e\n\u003cp data-start=\"11444\" data-end=\"11508\"\u003eStudents can identify the essential rainwater-harvesting stages:\u003c\/p\u003e\n\u003cp data-start=\"11510\" data-end=\"11577\"\u003e\u003cstrong data-start=\"11510\" data-end=\"11577\"\u003eRoof Catchment → Collector → Pipe → Gravity Flow → Storage Tank\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"11579\" data-end=\"11728\"\u003eThe model helps students connect an environmental concept with a visible physical process rather than viewing rainwater harvesting only as a diagram.\u003c\/p\u003e\n\u003chr data-start=\"11730\" data-end=\"11733\"\u003e\n\u003ch1 data-section-id=\"jmaeuz\" data-start=\"11735\" data-end=\"11769\"\u003eWhy the Transparent Pipe Matters\u003c\/h1\u003e\n\u003ch2 data-section-id=\"4jwhrl\" data-start=\"11771\" data-end=\"11802\"\u003eMake water movement visible.\u003c\/h2\u003e\n\u003cp data-start=\"11804\" data-end=\"11895\"\u003eThe transparent hose pipe allows students to follow the water through the conveyance stage.\u003c\/p\u003e\n\u003cp data-start=\"11897\" data-end=\"11914\"\u003eThey can observe:\u003c\/p\u003e\n\u003cul data-start=\"11916\" data-end=\"12155\"\u003e\n\u003cli data-section-id=\"1mc0atu\" data-start=\"11916\" data-end=\"11940\"\u003eWhere the water enters\u003c\/li\u003e\n\u003cli data-section-id=\"1r8aylt\" data-start=\"11941\" data-end=\"11974\"\u003eThe direction in which it moves\u003c\/li\u003e\n\u003cli data-section-id=\"1a6ejjn\" data-start=\"11975\" data-end=\"12008\"\u003eHow gravity influences the flow\u003c\/li\u003e\n\u003cli data-section-id=\"1p2asu3\" data-start=\"12009\" data-end=\"12039\"\u003eWhether air gaps are present\u003c\/li\u003e\n\u003cli data-section-id=\"1he6qj3\" data-start=\"12040\" data-end=\"12080\"\u003eWhether the pipe is twisted or blocked\u003c\/li\u003e\n\u003cli data-section-id=\"1fb1ajy\" data-start=\"12081\" data-end=\"12117\"\u003eHow pipe position affects movement\u003c\/li\u003e\n\u003cli data-section-id=\"19ro8z3\" data-start=\"12118\" data-end=\"12155\"\u003eWhere the water exits into the tank\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"12157\" data-end=\"12227\"\u003eThe visible flow path supports both demonstration and troubleshooting.\u003c\/p\u003e\n\u003cp data-start=\"12229\" data-end=\"12378\"\u003eStudents can understand that a harvesting system depends not only on collecting water, but also on guiding it effectively from one stage to the next.\u003c\/p\u003e\n\u003ch1 data-section-id=\"kzdfrs\" data-start=\"12385\" data-end=\"12428\"\u003eUnderstand the Complete Functional System\u003c\/h1\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"12430\" data-end=\"13326\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"12430\" data-end=\"12469\"\u003e\n\u003ctr data-start=\"12430\" data-end=\"12469\"\u003e\n\u003cth data-start=\"12430\" data-end=\"12445\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSystem stage\u003c\/th\u003e\n\u003cth data-start=\"12445\" data-end=\"12457\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eComponent\u003c\/th\u003e\n\u003cth data-start=\"12457\" data-end=\"12469\" data-col-size=\"md\" class=\"last:pe-10\"\u003eFunction\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"12484\" data-end=\"13326\"\u003e\n\u003ctr data-start=\"12484\" data-end=\"12559\"\u003e\n\u003ctd data-start=\"12484\" data-end=\"12510\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"12486\" data-end=\"12509\"\u003eEnvironmental input\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"12510\" data-end=\"12527\" data-col-size=\"sm\"\u003eWater droplets\u003c\/td\u003e\n\u003ctd data-start=\"12527\" data-end=\"12559\" data-col-size=\"md\"\u003eRepresent simulated rainfall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"12560\" data-end=\"12649\"\u003e\n\u003ctd data-start=\"12560\" data-end=\"12576\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"12562\" data-end=\"12575\"\u003eDetection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"12576\" data-end=\"12596\" data-col-size=\"sm\"\u003eRain-sensor plate\u003c\/td\u003e\n\u003ctd data-start=\"12596\" data-end=\"12649\" data-col-size=\"md\"\u003eResponds when water bridges the conductive tracks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"12650\" data-end=\"12725\"\u003e\n\u003ctd data-start=\"12650\" data-end=\"12674\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"12652\" data-end=\"12673\"\u003eElectronic output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"12674\" data-end=\"12690\" data-col-size=\"sm\"\u003eActive buzzer\u003c\/td\u003e\n\u003ctd data-start=\"12690\" data-end=\"12725\" data-col-size=\"md\"\u003eProduces the audible rain alert\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"12726\" data-end=\"12785\"\u003e\n\u003ctd data-start=\"12726\" data-end=\"12742\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"12728\" data-end=\"12741\"\u003eCatchment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"12742\" data-end=\"12755\" data-col-size=\"sm\"\u003eModel roof\u003c\/td\u003e\n\u003ctd data-start=\"12755\" data-end=\"12785\" data-col-size=\"md\"\u003eReceives the applied water\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"12786\" data-end=\"12856\"\u003e\n\u003ctd data-start=\"12786\" data-end=\"12803\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"12788\" data-end=\"12802\"\u003eCollection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"12803\" data-end=\"12826\" data-col-size=\"sm\"\u003eRoof-integrated tray\u003c\/td\u003e\n\u003ctd data-start=\"12826\" data-end=\"12856\" data-col-size=\"md\"\u003eGathers and directs runoff\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"12857\" data-end=\"12933\"\u003e\n\u003ctd data-start=\"12857\" data-end=\"12874\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"12859\" data-end=\"12873\"\u003eConveyance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"12874\" data-end=\"12898\" data-col-size=\"sm\"\u003eTransparent hose pipe\u003c\/td\u003e\n\u003ctd data-start=\"12898\" data-end=\"12933\" data-col-size=\"md\"\u003eCarries collected water visibly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"12934\" data-end=\"13010\"\u003e\n\u003ctd data-start=\"12934\" data-end=\"12954\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"12936\" data-end=\"12953\"\u003eDriving force\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"12954\" data-end=\"12964\" data-col-size=\"sm\"\u003eGravity\u003c\/td\u003e\n\u003ctd data-start=\"12964\" data-end=\"13010\" data-col-size=\"md\"\u003eMoves water from a higher to a lower level\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13011\" data-end=\"13084\"\u003e\n\u003ctd data-start=\"13011\" data-end=\"13025\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"13013\" data-end=\"13024\"\u003eStorage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"13025\" data-end=\"13038\" data-col-size=\"sm\"\u003eModel tank\u003c\/td\u003e\n\u003ctd data-start=\"13038\" data-end=\"13084\" data-col-size=\"md\"\u003eReceives and holds the demonstration water\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13085\" data-end=\"13155\"\u003e\n\u003ctd data-start=\"13085\" data-end=\"13097\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"13087\" data-end=\"13096\"\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"13097\" data-end=\"13110\" data-col-size=\"sm\"\u003e9V battery\u003c\/td\u003e\n\u003ctd data-start=\"13110\" data-end=\"13155\" data-col-size=\"md\"\u003eSupplies energy to the rain-alarm circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13156\" data-end=\"13235\"\u003e\n\u003ctd data-start=\"13156\" data-end=\"13182\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"13158\" data-end=\"13181\"\u003eApplication context\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"13182\" data-end=\"13196\" data-col-size=\"sm\"\u003eHouse model\u003c\/td\u003e\n\u003ctd data-start=\"13196\" data-end=\"13235\" data-col-size=\"md\"\u003eRepresents rooftop water collection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13236\" data-end=\"13326\"\u003e\n\u003ctd data-start=\"13236\" data-end=\"13259\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"13238\" data-end=\"13258\"\u003eLearning support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"13259\" data-end=\"13278\" data-col-size=\"sm\"\u003eManual and video\u003c\/td\u003e\n\u003ctd data-start=\"13278\" data-end=\"13326\" data-col-size=\"md\"\u003eGuide preparation, operation and explanation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr data-start=\"13328\" data-end=\"13331\"\u003e\n\u003ch1 data-section-id=\"a48czj\" data-start=\"13333\" data-end=\"13387\"\u003eA Water-Conservation Context Students Can Understand\u003c\/h1\u003e\n\u003ch2 data-section-id=\"1b7hk9h\" data-start=\"13389\" data-end=\"13447\"\u003eConnect rainfall, technology and responsible water use.\u003c\/h2\u003e\n\u003cp data-start=\"13449\" data-end=\"13528\"\u003eThe house, collector, pipe and tank provide a recognisable application context.\u003c\/p\u003e\n\u003cp data-start=\"13530\" data-end=\"13608\"\u003eEach element represents a stage within a rooftop rainwater-harvesting concept:\u003c\/p\u003e\n\u003cul data-start=\"13610\" data-end=\"13941\"\u003e\n\u003cli data-section-id=\"1lf7vdz\" data-start=\"13610\" data-end=\"13658\"\u003eThe \u003cstrong data-start=\"13616\" data-end=\"13624\"\u003eroof\u003c\/strong\u003e represents the catchment surface.\u003c\/li\u003e\n\u003cli data-section-id=\"k1eg41\" data-start=\"13659\" data-end=\"13708\"\u003eThe \u003cstrong data-start=\"13665\" data-end=\"13681\"\u003esensor plate\u003c\/strong\u003e represents rain detection.\u003c\/li\u003e\n\u003cli data-section-id=\"cctest\" data-start=\"13709\" data-end=\"13768\"\u003eThe \u003cstrong data-start=\"13715\" data-end=\"13725\"\u003ebuzzer\u003c\/strong\u003e communicates that water has been detected.\u003c\/li\u003e\n\u003cli data-section-id=\"1v9aelf\" data-start=\"13769\" data-end=\"13813\"\u003eThe \u003cstrong data-start=\"13775\" data-end=\"13793\"\u003ecollector tray\u003c\/strong\u003e gathers the runoff.\u003c\/li\u003e\n\u003cli data-section-id=\"1bbddz8\" data-start=\"13814\" data-end=\"13859\"\u003eThe \u003cstrong data-start=\"13820\" data-end=\"13840\"\u003etransparent pipe\u003c\/strong\u003e carries the water.\u003c\/li\u003e\n\u003cli data-section-id=\"w3fix\" data-start=\"13860\" data-end=\"13894\"\u003eThe \u003cstrong data-start=\"13866\" data-end=\"13874\"\u003etank\u003c\/strong\u003e represents storage.\u003c\/li\u003e\n\u003cli data-section-id=\"qjjp3f\" data-start=\"13895\" data-end=\"13941\"\u003eThe \u003cstrong data-start=\"13901\" data-end=\"13912\"\u003ebattery\u003c\/strong\u003e powers the electronic alert.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"13943\" data-end=\"13976\"\u003eThe model helps students explain:\u003c\/p\u003e\n\u003cul data-start=\"13978\" data-end=\"14289\"\u003e\n\u003cli data-section-id=\"t9r9nf\" data-start=\"13978\" data-end=\"14010\"\u003eWhy rainwater can be collected\u003c\/li\u003e\n\u003cli data-section-id=\"8spp01\" data-start=\"14011\" data-end=\"14049\"\u003eHow rooftop runoff can be redirected\u003c\/li\u003e\n\u003cli data-section-id=\"1o8kbfu\" data-start=\"14050\" data-end=\"14090\"\u003eWhy gravity is useful in water systems\u003c\/li\u003e\n\u003cli data-section-id=\"1kh3zv2\" data-start=\"14091\" data-end=\"14141\"\u003eHow detection and conservation can work together\u003c\/li\u003e\n\u003cli data-section-id=\"qz31n0\" data-start=\"14142\" data-end=\"14200\"\u003eHow visible infrastructure supports system understanding\u003c\/li\u003e\n\u003cli data-section-id=\"y0qxzo\" data-start=\"14201\" data-end=\"14289\"\u003eHow water-conservation concepts may be demonstrated at home, school or community scale\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"14291\" data-end=\"14502\"\u003eThe model presents a simplified educational representation. A real rainwater-harvesting installation may also require filtration, first-flush arrangements, overflow control, structural planning and safe storage.\u003c\/p\u003e\n\u003chr data-start=\"14504\" data-end=\"14507\"\u003e\n\u003ch1 data-section-id=\"z0ux1z\" data-start=\"14509\" data-end=\"14535\"\u003eTest. Observe. Discover.\u003c\/h1\u003e\n\u003ch2 data-section-id=\"180tqxz\" data-start=\"14537\" data-end=\"14563\"\u003eWet and Dry Sensor Test\u003c\/h2\u003e\n\u003cp data-start=\"14565\" data-end=\"14602\"\u003eBegin with the sensor completely dry.\u003c\/p\u003e\n\u003cp data-start=\"14604\" data-end=\"14651\"\u003eApply a few water drops and observe the buzzer.\u003c\/p\u003e\n\u003cp data-start=\"14653\" data-end=\"14705\"\u003eWipe the plate completely dry and observe the reset.\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"14707\" data-end=\"14946\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"14707\" data-end=\"14758\"\u003e\n\u003ctr data-start=\"14707\" data-end=\"14758\"\u003e\n\u003cth data-start=\"14707\" data-end=\"14724\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eTest condition\u003c\/th\u003e\n\u003cth data-start=\"14724\" data-end=\"14739\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSensor state\u003c\/th\u003e\n\u003cth data-start=\"14739\" data-end=\"14758\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eBuzzer response\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"14773\" data-end=\"14946\"\u003e\n\u003ctr data-start=\"14773\" data-end=\"14806\"\u003e\n\u003ctd data-start=\"14773\" data-end=\"14790\" data-col-size=\"sm\"\u003eBefore testing\u003c\/td\u003e\n\u003ctd data-start=\"14790\" data-end=\"14796\" data-col-size=\"sm\"\u003eDry\u003c\/td\u003e\n\u003ctd data-start=\"14796\" data-end=\"14806\" data-col-size=\"sm\"\u003eSilent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"14807\" data-end=\"14845\"\u003e\n\u003ctd data-start=\"14807\" data-end=\"14823\" data-col-size=\"sm\"\u003eWater applied\u003c\/td\u003e\n\u003ctd data-start=\"14823\" data-end=\"14829\" data-col-size=\"sm\"\u003eWet\u003c\/td\u003e\n\u003ctd data-start=\"14829\" data-end=\"14845\" data-col-size=\"sm\"\u003eAlert sounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"14846\" data-end=\"14899\"\u003e\n\u003ctd data-start=\"14846\" data-end=\"14869\" data-col-size=\"sm\"\u003eWater partly removed\u003c\/td\u003e\n\u003ctd data-start=\"14869\" data-end=\"14877\" data-col-size=\"sm\"\u003eMoist\u003c\/td\u003e\n\u003ctd data-start=\"14877\" data-end=\"14899\" data-col-size=\"sm\"\u003eAlert may continue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"14900\" data-end=\"14946\"\u003e\n\u003ctd data-start=\"14900\" data-end=\"14925\" data-col-size=\"sm\"\u003ePlate completely dried\u003c\/td\u003e\n\u003ctd data-start=\"14925\" data-end=\"14931\" data-col-size=\"sm\"\u003eDry\u003c\/td\u003e\n\u003ctd data-start=\"14931\" data-end=\"14946\" data-col-size=\"sm\"\u003eAlert stops\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 data-section-id=\"8iuy8\" data-start=\"14948\" data-end=\"14970\"\u003eWater-Quantity Test\u003c\/h2\u003e\n\u003cp data-start=\"14972\" data-end=\"15038\"\u003eUse the dropper to apply different controlled quantities of water.\u003c\/p\u003e\n\u003cp data-start=\"15040\" data-end=\"15060\"\u003eStudents can record:\u003c\/p\u003e\n\u003cul data-start=\"15062\" data-end=\"15259\"\u003e\n\u003cli data-section-id=\"1cahsoo\" data-start=\"15062\" data-end=\"15079\"\u003eNumber of drops\u003c\/li\u003e\n\u003cli data-section-id=\"11e8u3h\" data-start=\"15080\" data-end=\"15110\"\u003eWhether the buzzer activated\u003c\/li\u003e\n\u003cli data-section-id=\"1ak5lsa\" data-start=\"15111\" data-end=\"15148\"\u003eWhether water reached the collector\u003c\/li\u003e\n\u003cli data-section-id=\"rx9rsl\" data-start=\"15149\" data-end=\"15188\"\u003eWhether it became visible in the pipe\u003c\/li\u003e\n\u003cli data-section-id=\"1fsq3wk\" data-start=\"15189\" data-end=\"15218\"\u003eWhether it entered the tank\u003c\/li\u003e\n\u003cli data-section-id=\"8sc3yj\" data-start=\"15219\" data-end=\"15259\"\u003eWhether any water remained on the roof\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1oayinp\" data-start=\"15261\" data-end=\"15285\"\u003eFlow-Path Observation\u003c\/h2\u003e\n\u003cp data-start=\"15287\" data-end=\"15336\"\u003eFollow one group of droplets through every stage:\u003c\/p\u003e\n\u003col data-start=\"15338\" data-end=\"15466\"\u003e\n\u003cli data-section-id=\"1n01etu\" data-start=\"15338\" data-end=\"15362\"\u003eSensor or roof area\u003c\/li\u003e\n\u003cli data-section-id=\"gdfhj8\" data-start=\"15363\" data-end=\"15382\"\u003eCollector tray\u003c\/li\u003e\n\u003cli data-section-id=\"vj2n5h\" data-start=\"15383\" data-end=\"15399\"\u003eTray outlet\u003c\/li\u003e\n\u003cli data-section-id=\"14sfizo\" data-start=\"15400\" data-end=\"15426\"\u003eTransparent hose pipe\u003c\/li\u003e\n\u003cli data-section-id=\"1hn180k\" data-start=\"15427\" data-end=\"15442\"\u003eTank inlet\u003c\/li\u003e\n\u003cli data-section-id=\"ekaswr\" data-start=\"15443\" data-end=\"15466\"\u003eModel storage tank\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"15468\" data-end=\"15541\"\u003eStudents can draw and label the complete pathway in their project report.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1u6u46i\" data-start=\"15543\" data-end=\"15563\"\u003eGravity-Flow Test\u003c\/h2\u003e\n\u003cp data-start=\"15565\" data-end=\"15646\"\u003eObserve how the height difference between the roof and tank helps move the water.\u003c\/p\u003e\n\u003cp data-start=\"15648\" data-end=\"15675\"\u003eDiscuss what may happen if:\u003c\/p\u003e\n\u003cul data-start=\"15677\" data-end=\"15808\"\u003e\n\u003cli data-section-id=\"wi8dvz\" data-start=\"15677\" data-end=\"15697\"\u003eThe pipe is raised\u003c\/li\u003e\n\u003cli data-section-id=\"zqvqaz\" data-start=\"15698\" data-end=\"15719\"\u003eThe pipe is twisted\u003c\/li\u003e\n\u003cli data-section-id=\"mf8q1b\" data-start=\"15720\" data-end=\"15741\"\u003eThe pipe is blocked\u003c\/li\u003e\n\u003cli data-section-id=\"rkiyda\" data-start=\"15742\" data-end=\"15771\"\u003eThe tank is placed too high\u003c\/li\u003e\n\u003cli data-section-id=\"1spkhvk\" data-start=\"15772\" data-end=\"15808\"\u003eThe collector outlet is misaligned\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1sczom\" data-start=\"15810\" data-end=\"15831\"\u003eRepeatability Test\u003c\/h2\u003e\n\u003cp data-start=\"15833\" data-end=\"15866\"\u003eDry and reset the complete model.\u003c\/p\u003e\n\u003cp data-start=\"15868\" data-end=\"15963\"\u003eRepeat the demonstration using approximately the same quantity of water and compare the result.\u003c\/p\u003e\n\u003ch2 data-section-id=\"5nph7v\" data-start=\"15965\" data-end=\"16001\"\u003eCollection-Efficiency Observation\u003c\/h2\u003e\n\u003cp data-start=\"16003\" data-end=\"16093\"\u003eApply a measured quantity of water and observe how much appears to reach the storage tank.\u003c\/p\u003e\n\u003cp data-start=\"16095\" data-end=\"16122\"\u003eDiscuss why some water may:\u003c\/p\u003e\n\u003cul data-start=\"16124\" data-end=\"16269\"\u003e\n\u003cli data-section-id=\"1rs9eu0\" data-start=\"16124\" data-end=\"16144\"\u003eRemain on the roof\u003c\/li\u003e\n\u003cli data-section-id=\"1r1dwhd\" data-start=\"16145\" data-end=\"16172\"\u003eStay inside the collector\u003c\/li\u003e\n\u003cli data-section-id=\"qamwft\" data-start=\"16173\" data-end=\"16193\"\u003eAdhere to the pipe\u003c\/li\u003e\n\u003cli data-section-id=\"1gefq9r\" data-start=\"16194\" data-end=\"16229\"\u003eEscape through a loose connection\u003c\/li\u003e\n\u003cli data-section-id=\"pv6exc\" data-start=\"16230\" data-end=\"16269\"\u003eRemain inside the tank after emptying\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"dyp82u\" data-start=\"16271\" data-end=\"16284\"\u003eReset Test\u003c\/h2\u003e\n\u003cp data-start=\"16286\" data-end=\"16360\"\u003eObserve how long the buzzer continues after most visible water is removed.\u003c\/p\u003e\n\u003cp data-start=\"16362\" data-end=\"16495\"\u003eA thin water film or residue across the sensor tracks may continue completing the electrical path until the plate is wiped fully dry.\u003c\/p\u003e\n\u003ch1 data-section-id=\"st14a9\" data-start=\"16502\" data-end=\"16537\"\u003eLearn Through Every Demonstration\u003c\/h1\u003e\n\u003ch3 data-section-id=\"74yqa7\" data-start=\"16539\" data-end=\"16548\"\u003eWatch\u003c\/h3\u003e\n\u003cp data-start=\"16550\" data-end=\"16598\"\u003eReview the video demonstration before beginning.\u003c\/p\u003e\n\u003ch3 data-section-id=\"y9l8or\" data-start=\"16600\" data-end=\"16611\"\u003ePredict\u003c\/h3\u003e\n\u003cp data-start=\"16613\" data-end=\"16675\"\u003eWhat will happen when the first water drop reaches the sensor?\u003c\/p\u003e\n\u003ch3 data-section-id=\"y9uabr\" data-start=\"16677\" data-end=\"16688\"\u003ePrepare\u003c\/h3\u003e\n\u003cp data-start=\"16690\" data-end=\"16756\"\u003eCheck the sensor, pipeline and tank before connecting the battery.\u003c\/p\u003e\n\u003ch3 data-section-id=\"ynqv2o\" data-start=\"16758\" data-end=\"16766\"\u003eTest\u003c\/h3\u003e\n\u003cp data-start=\"16768\" data-end=\"16821\"\u003eApply a controlled amount of water using the dropper.\u003c\/p\u003e\n\u003ch3 data-section-id=\"sizzw\" data-start=\"16823\" data-end=\"16834\"\u003eObserve\u003c\/h3\u003e\n\u003cp data-start=\"16836\" data-end=\"16899\"\u003eListen to the buzzer and watch the water move through the pipe.\u003c\/p\u003e\n\u003ch3 data-section-id=\"pjpz2j\" data-start=\"16901\" data-end=\"16911\"\u003eRecord\u003c\/h3\u003e\n\u003cp data-start=\"16913\" data-end=\"16973\"\u003eDocument the amount of water used and the response observed.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1ob2s0x\" data-start=\"16975\" data-end=\"16986\"\u003eCompare\u003c\/h3\u003e\n\u003cp data-start=\"16988\" data-end=\"17053\"\u003eRepeat the activity using a different quantity or flow condition.\u003c\/p\u003e\n\u003ch3 data-section-id=\"14mypyj\" data-start=\"17055\" data-end=\"17066\"\u003eAnalyse\u003c\/h3\u003e\n\u003cp data-start=\"17068\" data-end=\"17135\"\u003eExplain why the alarm activated and how the water reached the tank.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1bn6r32\" data-start=\"17137\" data-end=\"17153\"\u003eTroubleshoot\u003c\/h3\u003e\n\u003cp data-start=\"17155\" data-end=\"17242\"\u003eCheck the battery, sensor surface, collector outlet, pipe position and tank connection.\u003c\/p\u003e\n\u003ch3 data-section-id=\"16njeap\" data-start=\"17244\" data-end=\"17255\"\u003eExplain\u003c\/h3\u003e\n\u003cp data-start=\"17257\" data-end=\"17349\"\u003eDescribe the electronic rain alarm and physical harvesting process as two connected systems.\u003c\/p\u003e\n\u003ch3 data-section-id=\"gd19q8\" data-start=\"17351\" data-end=\"17361\"\u003eExtend\u003c\/h3\u003e\n\u003cp data-start=\"17363\" data-end=\"17465\"\u003eDevelop further questions about water storage, irrigation, filtration and smart-city water management.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1hhrn0b\" data-start=\"17472\" data-end=\"17494\"\u003eExplore Key Concepts\u003c\/h1\u003e\n\u003ch2 data-section-id=\"l7y2ym\" data-start=\"17496\" data-end=\"17513\"\u003eRain Detection\u003c\/h2\u003e\n\u003cul data-start=\"17515\" data-end=\"17621\"\u003e\n\u003cli data-section-id=\"u70l7c\" data-start=\"17515\" data-end=\"17535\"\u003eRain-sensor plates\u003c\/li\u003e\n\u003cli data-section-id=\"6y1c0i\" data-start=\"17536\" data-end=\"17553\"\u003eWater detection\u003c\/li\u003e\n\u003cli data-section-id=\"1045bey\" data-start=\"17554\" data-end=\"17578\"\u003eWet and dry conditions\u003c\/li\u003e\n\u003cli data-section-id=\"1l6lz6w\" data-start=\"17579\" data-end=\"17597\"\u003eAutomatic alerts\u003c\/li\u003e\n\u003cli data-section-id=\"1m8lv7f\" data-start=\"17598\" data-end=\"17621\"\u003eEnvironmental sensing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1laqw8b\" data-start=\"17623\" data-end=\"17645\"\u003eElectrical Circuits\u003c\/h2\u003e\n\u003cul data-start=\"17647\" data-end=\"17788\"\u003e\n\u003cli data-section-id=\"1icpibg\" data-start=\"17647\" data-end=\"17662\"\u003eOpen circuits\u003c\/li\u003e\n\u003cli data-section-id=\"t1c8jp\" data-start=\"17663\" data-end=\"17683\"\u003eCompleted circuits\u003c\/li\u003e\n\u003cli data-section-id=\"f3evmn\" data-start=\"17684\" data-end=\"17711\"\u003eConductors and insulators\u003c\/li\u003e\n\u003cli data-section-id=\"78w739\" data-start=\"17712\" data-end=\"17735\"\u003eElectrical resistance\u003c\/li\u003e\n\u003cli data-section-id=\"1drqp0h\" data-start=\"17736\" data-end=\"17762\"\u003eInput and output devices\u003c\/li\u003e\n\u003cli data-section-id=\"19usfz0\" data-start=\"17763\" data-end=\"17788\"\u003eActive-buzzer operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"8tq83o\" data-start=\"17790\" data-end=\"17806\"\u003eWater Science\u003c\/h2\u003e\n\u003cul data-start=\"17808\" data-end=\"17932\"\u003e\n\u003cli data-section-id=\"amp6bf\" data-start=\"17808\" data-end=\"17818\"\u003eRainfall\u003c\/li\u003e\n\u003cli data-section-id=\"xxh06z\" data-start=\"17819\" data-end=\"17835\"\u003eSurface runoff\u003c\/li\u003e\n\u003cli data-section-id=\"107oqag\" data-start=\"17836\" data-end=\"17855\"\u003eRooftop catchment\u003c\/li\u003e\n\u003cli data-section-id=\"1dj1fm3\" data-start=\"17856\" data-end=\"17874\"\u003eWater collection\u003c\/li\u003e\n\u003cli data-section-id=\"wka6zy\" data-start=\"17875\" data-end=\"17884\"\u003eGravity\u003c\/li\u003e\n\u003cli data-section-id=\"1j5wsu1\" data-start=\"17885\" data-end=\"17901\"\u003eFluid movement\u003c\/li\u003e\n\u003cli data-section-id=\"1yh2dms\" data-start=\"17902\" data-end=\"17917\"\u003eWater storage\u003c\/li\u003e\n\u003cli data-section-id=\"1vxejxh\" data-start=\"17918\" data-end=\"17932\"\u003eConservation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"13tw1yo\" data-start=\"17934\" data-end=\"17952\"\u003eSystem Thinking\u003c\/h2\u003e\n\u003cul data-start=\"17954\" data-end=\"18024\"\u003e\n\u003cli data-section-id=\"16tcxy6\" data-start=\"17954\" data-end=\"17961\"\u003eInput\u003c\/li\u003e\n\u003cli data-section-id=\"197uv47\" data-start=\"17962\" data-end=\"17973\"\u003eDetection\u003c\/li\u003e\n\u003cli data-section-id=\"16yot9i\" data-start=\"17974\" data-end=\"17981\"\u003eAlert\u003c\/li\u003e\n\u003cli data-section-id=\"d32m87\" data-start=\"17982\" data-end=\"17993\"\u003eCatchment\u003c\/li\u003e\n\u003cli data-section-id=\"gez021\" data-start=\"17994\" data-end=\"18006\"\u003eConveyance\u003c\/li\u003e\n\u003cli data-section-id=\"1p4gu1d\" data-start=\"18007\" data-end=\"18016\"\u003eStorage\u003c\/li\u003e\n\u003cli data-section-id=\"179grst\" data-start=\"18017\" data-end=\"18024\"\u003eReset\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"bhz16e\" data-start=\"18026\" data-end=\"18052\"\u003ePractical Investigation\u003c\/h2\u003e\n\u003cul data-start=\"18054\" data-end=\"18183\"\u003e\n\u003cli data-section-id=\"gcqx08\" data-start=\"18054\" data-end=\"18078\"\u003eControlled application\u003c\/li\u003e\n\u003cli data-section-id=\"1at15ml\" data-start=\"18079\" data-end=\"18094\"\u003eRepeatability\u003c\/li\u003e\n\u003cli data-section-id=\"emq8pz\" data-start=\"18095\" data-end=\"18115\"\u003eObservation tables\u003c\/li\u003e\n\u003cli data-section-id=\"3w5wz4\" data-start=\"18116\" data-end=\"18144\"\u003eMeasurement and comparison\u003c\/li\u003e\n\u003cli data-section-id=\"183g7jc\" data-start=\"18145\" data-end=\"18165\"\u003eFlow-path analysis\u003c\/li\u003e\n\u003cli data-section-id=\"z1z1u8\" data-start=\"18166\" data-end=\"18183\"\u003eTroubleshooting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-section-id=\"1yowdg0\" data-start=\"18190\" data-end=\"18230\"\u003eOne Model. Multiple Learning Outcomes.\u003c\/h1\u003e\n\u003cp data-start=\"18232\" data-end=\"18273\"\u003eThe model allows students to explore how:\u003c\/p\u003e\n\u003cul data-start=\"18275\" data-end=\"18800\"\u003e\n\u003cli data-section-id=\"x8aghe\" data-start=\"18275\" data-end=\"18327\"\u003eWater changes the electrical condition of a sensor\u003c\/li\u003e\n\u003cli data-section-id=\"1uq0x9v\" data-start=\"18328\" data-end=\"18372\"\u003eConductive tracks can detect a wet surface\u003c\/li\u003e\n\u003cli data-section-id=\"n6c2cc\" data-start=\"18373\" data-end=\"18427\"\u003eAn electronic circuit can produce an automatic alert\u003c\/li\u003e\n\u003cli data-section-id=\"1e1n0ew\" data-start=\"18428\" data-end=\"18469\"\u003eA roof can function as a catchment area\u003c\/li\u003e\n\u003cli data-section-id=\"1bx5580\" data-start=\"18470\" data-end=\"18517\"\u003eRunoff can be collected instead of being lost\u003c\/li\u003e\n\u003cli data-section-id=\"1dvypc\" data-start=\"18518\" data-end=\"18557\"\u003eGravity can move water through a pipe\u003c\/li\u003e\n\u003cli data-section-id=\"46bw7m\" data-start=\"18558\" data-end=\"18615\"\u003eTransparent components make a process easier to observe\u003c\/li\u003e\n\u003cli data-section-id=\"i2sngg\" data-start=\"18616\" data-end=\"18662\"\u003eCollected water can be directed into storage\u003c\/li\u003e\n\u003cli data-section-id=\"13jvpdv\" data-start=\"18663\" data-end=\"18720\"\u003eElectronics and environmental systems can work together\u003c\/li\u003e\n\u003cli data-section-id=\"yj4tsn\" data-start=\"18721\" data-end=\"18800\"\u003eResponsible water management begins with understanding the complete flow path\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-section-id=\"1hdonrc\" data-start=\"18807\" data-end=\"18842\"\u003eBuilt for Confident Demonstration\u003c\/h1\u003e\n\u003cp data-start=\"18844\" data-end=\"18947\"\u003eThe visible water movement, audible response and guided learning resources make the model suitable for:\u003c\/p\u003e\n\u003cul data-start=\"18949\" data-end=\"19393\"\u003e\n\u003cli data-section-id=\"cas5ce\" data-start=\"18949\" data-end=\"18974\"\u003eSchool science projects\u003c\/li\u003e\n\u003cli data-section-id=\"kiq2zo\" data-start=\"18975\" data-end=\"18996\"\u003eScience exhibitions\u003c\/li\u003e\n\u003cli data-section-id=\"1e0u4lr\" data-start=\"18997\" data-end=\"19023\"\u003eClassroom demonstrations\u003c\/li\u003e\n\u003cli data-section-id=\"zkm0cu\" data-start=\"19024\" data-end=\"19060\"\u003eRainwater-harvesting presentations\u003c\/li\u003e\n\u003cli data-section-id=\"14gkifv\" data-start=\"19061\" data-end=\"19090\"\u003eWater-conservation projects\u003c\/li\u003e\n\u003cli data-section-id=\"ws4o2q\" data-start=\"19091\" data-end=\"19125\"\u003eEnvironmental-science activities\u003c\/li\u003e\n\u003cli data-section-id=\"xt95m9\" data-start=\"19126\" data-end=\"19154\"\u003eRain-sensor demonstrations\u003c\/li\u003e\n\u003cli data-section-id=\"1r8cg9r\" data-start=\"19155\" data-end=\"19191\"\u003eElectrical-conductivity activities\u003c\/li\u003e\n\u003cli data-section-id=\"z5fx6v\" data-start=\"19192\" data-end=\"19221\"\u003eGravity-flow demonstrations\u003c\/li\u003e\n\u003cli data-section-id=\"16ewa0d\" data-start=\"19222\" data-end=\"19256\"\u003eSustainable-building discussions\u003c\/li\u003e\n\u003cli data-section-id=\"1v9xwk3\" data-start=\"19257\" data-end=\"19272\"\u003eSTEM learning\u003c\/li\u003e\n\u003cli data-section-id=\"1nl6elw\" data-start=\"19273\" data-end=\"19296\"\u003eExperiential learning\u003c\/li\u003e\n\u003cli data-section-id=\"1o2e6vp\" data-start=\"19297\" data-end=\"19321\"\u003eProject-based learning\u003c\/li\u003e\n\u003cli data-section-id=\"4tplyf\" data-start=\"19322\" data-end=\"19350\"\u003eProject-report preparation\u003c\/li\u003e\n\u003cli data-section-id=\"1o8392l\" data-start=\"19351\" data-end=\"19379\"\u003eViva and oral presentation\u003c\/li\u003e\n\u003cli data-section-id=\"11hgo15\" data-start=\"19380\" data-end=\"19393\"\u003eGrades 7–12\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-section-id=\"14d3cd5\" data-start=\"19400\" data-end=\"19431\"\u003eSuggested Student Explanation\u003c\/h1\u003e\n\u003cblockquote data-start=\"19433\" data-end=\"20003\"\u003e\n\u003cp data-start=\"19435\" data-end=\"20003\"\u003e“This is a 2-in-1 rainwater-harvesting model and rain-alarm working project. When water reaches the conductive tracks on the rain sensor, it bridges the gap and changes the electrical condition of the circuit. This activates the buzzer and produces an audible rain alert. The water is also collected from the model roof, directed into the collector tray and carried through the transparent pipe by gravity. It then enters the model storage tank. The project demonstrates rain detection, electrical conductivity, gravity flow, rooftop catchment and water conservation.”\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch1 data-section-id=\"kts086\" data-start=\"20010\" data-end=\"20037\"\u003eBuild Upon the Foundation\u003c\/h1\u003e\n\u003cp data-start=\"20039\" data-end=\"20152\"\u003eOnce students understand the original detection and harvesting sequence, the model can inspire further questions:\u003c\/p\u003e\n\u003cul data-start=\"20154\" data-end=\"20742\"\u003e\n\u003cli data-section-id=\"5zqoo\" data-start=\"20154\" data-end=\"20197\"\u003eCould an LED provide a visual rain alert?\u003c\/li\u003e\n\u003cli data-section-id=\"19yoblj\" data-start=\"20198\" data-end=\"20246\"\u003eCould a switch be added to control the buzzer?\u003c\/li\u003e\n\u003cli data-section-id=\"1v22dlp\" data-start=\"20247\" data-end=\"20296\"\u003eCould the tank include a water-level indicator?\u003c\/li\u003e\n\u003cli data-section-id=\"iorbsx\" data-start=\"20297\" data-end=\"20335\"\u003eCould an overflow alert be explored?\u003c\/li\u003e\n\u003cli data-section-id=\"112zr2\" data-start=\"20336\" data-end=\"20374\"\u003eCould a filter layer be represented?\u003c\/li\u003e\n\u003cli data-section-id=\"rdt9kv\" data-start=\"20375\" data-end=\"20421\"\u003eCould a first-flush concept be demonstrated?\u003c\/li\u003e\n\u003cli data-section-id=\"1tdvfzu\" data-start=\"20422\" data-end=\"20481\"\u003eCould collected water be directed towards a model garden?\u003c\/li\u003e\n\u003cli data-section-id=\"1ov5srp\" data-start=\"20482\" data-end=\"20524\"\u003eCould different roof slopes be compared?\u003c\/li\u003e\n\u003cli data-section-id=\"goq4mn\" data-start=\"20525\" data-end=\"20575\"\u003eCould the volume of collected water be measured?\u003c\/li\u003e\n\u003cli data-section-id=\"1q8uck\" data-start=\"20576\" data-end=\"20619\"\u003eCould a second sensor detect a full tank?\u003c\/li\u003e\n\u003cli data-section-id=\"16kljds\" data-start=\"20620\" data-end=\"20669\"\u003eCould a microcontroller record rainfall events?\u003c\/li\u003e\n\u003cli data-section-id=\"dvmhbj\" data-start=\"20670\" data-end=\"20742\"\u003eCould the model be expanded into a community water-management display?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"20744\" data-end=\"20861\"\u003eThese are further learning directions. Additional components, modifications and appropriate guidance may be required.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1sdrx7j\" data-start=\"20868\" data-end=\"20910\"\u003eThis Concept Can Also Be Used to Explore\u003c\/h1\u003e\n\u003cp data-start=\"20912\" data-end=\"20998\"\u003eThe model’s detection, collection and storage sequence can support discussions around:\u003c\/p\u003e\n\u003cul data-start=\"21000\" data-end=\"21502\"\u003e\n\u003cli data-section-id=\"154aumx\" data-start=\"21000\" data-end=\"21030\"\u003eRooftop rainwater harvesting\u003c\/li\u003e\n\u003cli data-section-id=\"kdxiic\" data-start=\"21031\" data-end=\"21061\"\u003eAutomatic rain-alert systems\u003c\/li\u003e\n\u003cli data-section-id=\"qozg1o\" data-start=\"21062\" data-end=\"21084\"\u003eWater-leak detection\u003c\/li\u003e\n\u003cli data-section-id=\"1m7xp4g\" data-start=\"21085\" data-end=\"21117\"\u003eTank-overflow warning concepts\u003c\/li\u003e\n\u003cli data-section-id=\"13xoj6v\" data-start=\"21118\" data-end=\"21145\"\u003eGravity-fed water systems\u003c\/li\u003e\n\u003cli data-section-id=\"174s0fe\" data-start=\"21146\" data-end=\"21183\"\u003eHousehold water-conservation models\u003c\/li\u003e\n\u003cli data-section-id=\"1e2lt6x\" data-start=\"21184\" data-end=\"21221\"\u003eSchool rainwater-harvesting systems\u003c\/li\u003e\n\u003cli data-section-id=\"ws83jq\" data-start=\"21222\" data-end=\"21269\"\u003eAgricultural catchment and irrigation storage\u003c\/li\u003e\n\u003cli data-section-id=\"1id2l65\" data-start=\"21270\" data-end=\"21308\"\u003eUrban stormwater-management concepts\u003c\/li\u003e\n\u003cli data-section-id=\"8l2d58\" data-start=\"21309\" data-end=\"21338\"\u003eSustainable-building design\u003c\/li\u003e\n\u003cli data-section-id=\"1v6m5b6\" data-start=\"21339\" data-end=\"21368\"\u003eSmart-city water monitoring\u003c\/li\u003e\n\u003cli data-section-id=\"siezwy\" data-start=\"21369\" data-end=\"21393\"\u003eFlood-warning concepts\u003c\/li\u003e\n\u003cli data-section-id=\"10e01ot\" data-start=\"21394\" data-end=\"21415\"\u003eWater-level sensing\u003c\/li\u003e\n\u003cli data-section-id=\"15vzzil\" data-start=\"21416\" data-end=\"21439\"\u003eRoof-slope comparison\u003c\/li\u003e\n\u003cli data-section-id=\"1feq9ic\" data-start=\"21440\" data-end=\"21471\"\u003eDrainage and pipeline systems\u003c\/li\u003e\n\u003cli data-section-id=\"1k5z7ks\" data-start=\"21472\" data-end=\"21502\"\u003eInput-process-output systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"21504\" data-end=\"21657\"\u003eThese are \u003cstrong data-start=\"21514\" data-end=\"21548\"\u003eeducational concept extensions\u003c\/strong\u003e based on the model’s working principles. They are not additional built-in functions of the supplied product.\u003c\/p\u003e\n\u003ch1 data-section-id=\"1nv7sq5\" data-start=\"24083\" data-end=\"24123\"\u003eConcept and Sustainability Connections\u003c\/h1\u003e\n\u003cp data-start=\"24125\" data-end=\"24175\"\u003eThe model can support classroom discussion around:\u003c\/p\u003e\n\u003cul data-start=\"24177\" data-end=\"24419\"\u003e\n\u003cli data-section-id=\"b6k37o\" data-start=\"24177\" data-end=\"24194\"\u003eWater resources\u003c\/li\u003e\n\u003cli data-section-id=\"154aumx\" data-start=\"24195\" data-end=\"24225\"\u003eRooftop rainwater harvesting\u003c\/li\u003e\n\u003cli data-section-id=\"ki7l1v\" data-start=\"24226\" data-end=\"24242\"\u003eRain detection\u003c\/li\u003e\n\u003cli data-section-id=\"1y3t1d2\" data-start=\"24243\" data-end=\"24264\"\u003eElectrical circuits\u003c\/li\u003e\n\u003cli data-section-id=\"f3evmn\" data-start=\"24265\" data-end=\"24292\"\u003eConductors and insulators\u003c\/li\u003e\n\u003cli data-section-id=\"xyyixx\" data-start=\"24293\" data-end=\"24317\"\u003eGravity and fluid flow\u003c\/li\u003e\n\u003cli data-section-id=\"1yh2dms\" data-start=\"24318\" data-end=\"24333\"\u003eWater storage\u003c\/li\u003e\n\u003cli data-section-id=\"1i64fu1\" data-start=\"24334\" data-end=\"24359\"\u003eResponsible consumption\u003c\/li\u003e\n\u003cli data-section-id=\"1lryqy8\" data-start=\"24360\" data-end=\"24385\"\u003eSustainable communities\u003c\/li\u003e\n\u003cli data-section-id=\"1n2590s\" data-start=\"24386\" data-end=\"24419\"\u003eObservation and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"24421\" data-end=\"24761\"\u003eThe box independently maps the model to selected themes associated with water conservation, sustainable communities and responsible consumption. These are educational concept references only and do not imply approval, certification or endorsement by NCERT, CBSE, the United Nations or any school board.\u003c\/p\u003e\n\u003ch1 data-section-id=\"158v5je\" data-start=\"24768\" data-end=\"24797\"\u003eA Complete Learning Journey\u003c\/h1\u003e\n\u003ch2 data-section-id=\"4j6q80\" data-start=\"24799\" data-end=\"24818\"\u003eScan the code.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1ns05dq\" data-start=\"24819\" data-end=\"24848\"\u003eWatch the demonstration.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1sl89mi\" data-start=\"24849\" data-end=\"24870\"\u003eRead the manual.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1kkyj0c\" data-start=\"24871\" data-end=\"24894\"\u003ePrepare the model.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"z7t2mr\" data-start=\"24895\" data-end=\"24916\"\u003eApply the water.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"enccpi\" data-start=\"24917\" data-end=\"24942\"\u003eHear the rain alert.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"dqzi1d\" data-start=\"24943\" data-end=\"24964\"\u003eFollow the flow.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"di1rty\" data-start=\"24965\" data-end=\"24993\"\u003eCollect it in the tank.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"cxp7xy\" data-start=\"24994\" data-end=\"25017\"\u003eRecord the result.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"4qcamo\" data-start=\"25018\" data-end=\"25039\"\u003eClean and reset.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1ixk6pc\" data-start=\"25040\" data-end=\"25064\"\u003eExplain the system.\u003c\/h2\u003e\n\u003ch2 data-section-id=\"1e6rqbt\" data-start=\"25065\" data-end=\"25088\"\u003eBuild upon the idea.\u003c\/h2\u003e\n\u003cp data-start=\"25090\" data-end=\"25327\"\u003eThe \u003cstrong data-start=\"25094\" data-end=\"25148\"\u003eGo Science Rainwater Harvesting Model \u0026amp; Rain Alarm\u003c\/strong\u003e transforms water detection, electrical conductivity, gravity and conservation into a guided working experience students can observe, test, understand and confidently demonstrate.\u003c\/p\u003e\n\u003ch1 data-section-id=\"4evk91\" data-start=\"25334\" data-end=\"25379\"\u003eImportant Educational and Usage Information\u003c\/h1\u003e\n\u003cp data-start=\"25381\" data-end=\"25457\"\u003eThis product is an educational demonstration model and science teaching aid.\u003c\/p\u003e\n\u003cul data-start=\"25459\" data-end=\"26287\"\u003e\n\u003cli data-section-id=\"10qu1jp\" data-start=\"25459\" data-end=\"25505\"\u003eAdult or teacher supervision is recommended.\u003c\/li\u003e\n\u003cli data-section-id=\"bkmokq\" data-start=\"25506\" data-end=\"25549\"\u003eUse only small quantities of clean water.\u003c\/li\u003e\n\u003cli data-section-id=\"146qotw\" data-start=\"25550\" data-end=\"25591\"\u003eApply water using the supplied dropper.\u003c\/li\u003e\n\u003cli data-section-id=\"t4lw10\" data-start=\"25592\" data-end=\"25644\"\u003ePlace the model on a flat, stable and dry surface.\u003c\/li\u003e\n\u003cli data-section-id=\"1t7uu6b\" data-start=\"25645\" data-end=\"25725\"\u003eKeep water away from the battery terminals and exposed electrical connections.\u003c\/li\u003e\n\u003cli data-section-id=\"1e7elkl\" data-start=\"25726\" data-end=\"25776\"\u003eDo not pour, splash or flood the complete model.\u003c\/li\u003e\n\u003cli data-section-id=\"193vtll\" data-start=\"25777\" data-end=\"25830\"\u003eCheck battery polarity carefully before connection.\u003c\/li\u003e\n\u003cli data-section-id=\"bomjn1\" data-start=\"25831\" data-end=\"25870\"\u003eKeep each buzzer demonstration brief.\u003c\/li\u003e\n\u003cli data-section-id=\"rpavuh\" data-start=\"25871\" data-end=\"25925\"\u003eDisconnect the battery immediately after every test.\u003c\/li\u003e\n\u003cli data-section-id=\"18u73kq\" data-start=\"25926\" data-end=\"25975\"\u003eWipe the sensor plate completely dry after use.\u003c\/li\u003e\n\u003cli data-section-id=\"18fu5d8\" data-start=\"25976\" data-end=\"26007\"\u003eEmpty the model storage tank.\u003c\/li\u003e\n\u003cli data-section-id=\"1scsqfn\" data-start=\"26008\" data-end=\"26056\"\u003eDrain the transparent pipe and collector tray.\u003c\/li\u003e\n\u003cli data-section-id=\"3nwqqr\" data-start=\"26057\" data-end=\"26112\"\u003eNever store the kit while moisture remains inside it.\u003c\/li\u003e\n\u003cli data-section-id=\"bupwvs\" data-start=\"26113\" data-end=\"26165\"\u003eDo not store the model with the battery connected.\u003c\/li\u003e\n\u003cli data-section-id=\"vattu5\" data-start=\"26166\" data-end=\"26224\"\u003eStore in a cool, dry location away from direct sunlight.\u003c\/li\u003e\n\u003cli data-section-id=\"114txdz\" data-start=\"26225\" data-end=\"26287\"\u003eInternet access is required for the online manual and video.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"6f2uf4\" data-start=\"26289\" data-end=\"26320\"\u003eImportant Product Limitation\u003c\/h2\u003e\n\u003cp data-start=\"26322\" data-end=\"26427\"\u003eThis product demonstrates rain detection and rainwater-harvesting principles for educational observation.\u003c\/p\u003e\n\u003cp data-start=\"26429\" data-end=\"26439\"\u003eIt is not:\u003c\/p\u003e\n\u003cul data-start=\"26441\" data-end=\"26749\"\u003e\n\u003cli data-section-id=\"1iz3vc3\" data-start=\"26441\" data-end=\"26473\"\u003eA certified weather instrument\u003c\/li\u003e\n\u003cli data-section-id=\"16nzjdx\" data-start=\"26474\" data-end=\"26505\"\u003eA rainfall-measurement device\u003c\/li\u003e\n\u003cli data-section-id=\"1bkuzph\" data-start=\"26506\" data-end=\"26530\"\u003eA flood-warning system\u003c\/li\u003e\n\u003cli data-section-id=\"lkays3\" data-start=\"26531\" data-end=\"26556\"\u003eA plumbing installation\u003c\/li\u003e\n\u003cli data-section-id=\"1wg887g\" data-start=\"26557\" data-end=\"26584\"\u003eA water-filtration system\u003c\/li\u003e\n\u003cli data-section-id=\"1fw2uvt\" data-start=\"26585\" data-end=\"26619\"\u003eA drinking-water storage product\u003c\/li\u003e\n\u003cli data-section-id=\"jpxllo\" data-start=\"26620\" data-end=\"26653\"\u003eA certified tank-overflow alarm\u003c\/li\u003e\n\u003cli data-section-id=\"clai2i\" data-start=\"26654\" data-end=\"26705\"\u003eA real building rainwater-harvesting installation\u003c\/li\u003e\n\u003cli data-section-id=\"1rl9jo5\" data-start=\"26706\" data-end=\"26749\"\u003eA life-safety or emergency-warning device\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"26751\" data-end=\"26944\"\u003eThe model tank and collected demonstration water are not intended for drinking, household use or long-term storage.\u003c\/p\u003e\n\u003cp data-start=\"26751\" data-end=\"26944\"\u003e\u003cstrong data-start=\"29487\" data-end=\"29524\"\u003eReturn, Refund \u0026amp; Exchange Notice:\u003c\/strong\u003e This educational working model contains tested and sensitive electronic components together with a water-flow demonstration system. Kits that have been opened, powered, activated, tested, used, altered or exposed to water or unsuitable operating conditions are not eligible for return, refund or exchange . The required 9V battery is not included. Please review the product description, included contents, dimensions, power requirement, demonstration video and operating instructions carefully before purchase.\u003ccode\u003e\u003c\/code\u003e\u003c\/p\u003e\n\u003cp data-start=\"26751\" data-end=\"26944\"\u003e\u003ccode\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/code\u003e\u003c\/p\u003e","brand":"Go Science","offers":[{"title":"Default Title","offer_id":45648662233135,"sku":"2671814292803","price":649.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/4442\/3471\/files\/GO_Science_Classroom_Series_Rainwater_Harvesting_Model_Rain_Alarm_school_project_kit_retail_box_front.jpg?v=1784648985"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/4442\/3471\/collections\/All_products_go_science_classroom_Series_83dd76b4-aa97-4645-9e7e-af240d789ab5.png?v=1784667139","url":"https:\/\/goscience.in\/collections\/go-science-classroom-series-school-project-demonstration-kits.oembed","provider":"Go Science","version":"1.0","type":"link"}