{"product_id":"smart-street-light-school-project","title":"Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eSmart Street Light School Project \u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003eAutomatic Street Light (LDR Sensor) - Go Science Classroom Series — Educational Concept Model Kit\u003c\/h1\u003e\n\u003ch3\u003eSchool Project \u0026amp; Demonstration Model\u003c\/h3\u003e\n\u003ch3\u003ePre-Wired Automatic Lighting \u0026amp; Smart-City Learning Kit\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDetect the light. Simulate darkness. Watch both street lights respond automatically.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTurn ambient-light sensing, electronic control, transistor switching and the energy-saving concept of automatic public lighting into one connected learning experience.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eGo Science Classroom Series Smart Street Light — Automatic Street Light (LDR Sensor)\u003c\/strong\u003e is a pre-wired educational working model that demonstrates how street lights can respond automatically to changes in surrounding light.\u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"1012\" height=\"569\" src=\"https:\/\/www.youtube.com\/embed\/2B_lYJoA-IE\" title=\"\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003eThe model combines an LDR light-sensor module, comparator-based control circuit, BC547 transistor-switching stage and two white LED street lights on a contextual road-layout base.\u003c\/p\u003e\n\u003ch3\u003eUnder Sufficient Ambient Light\u003c\/h3\u003e\n\u003cp\u003eThe LDR responds to the brighter condition. The BC547 transistor remains switched off and both model street lights remain off.\u003c\/p\u003e\n\u003ch3\u003eWhen Darkness Is Simulated\u003c\/h3\u003e\n\u003cp\u003eCovering the LDR changes the sensor-module output. The BC547 transistor switches on and both LED street lights illuminate automatically.\u003c\/p\u003e\n\u003ch3\u003eWhen Light Returns\u003c\/h3\u003e\n\u003cp\u003eThe sensor responds to the brighter condition again. The transistor switches off and both street lights turn off automatically.\u003c\/p\u003e\n\u003cp\u003eStudents can observe the complete sequence:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDetect the Light → Compare the Condition → Switch the Circuit → Illuminate Both Street Lights → Restore the Light → Reset Automatically\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe four-stage operating journey can also be explained as:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDaylight Detected by LDR → Transistor Remains OFF → Darkness Detected by LDR → LED Street Lights Turn ON\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe model helps students understand how an environmental input can be detected, processed and used to control an electrical output without manually operating the street lights.\u003c\/p\u003e\n\u003cp\u003eSuggested for \u003cstrong\u003eGrades 7–12\u003c\/strong\u003e, it is suitable for school projects, science exhibitions, classroom demonstrations, electronics activities, smart-city presentations, energy-conservation discussions, STEM learning, project reports and viva preparation.\u003c\/p\u003e\n\u003ch1\u003eOne Sensor. Two Street Lights. One Automatic System.\u003c\/h1\u003e\n\u003ch2\u003eExplore light sensing, electronic control and automatic lighting together\u003c\/h2\u003e\n\u003cp\u003eThe model allows students to observe several connected scientific and electronic processes operating within one recognisable road-lighting environment.\u003c\/p\u003e\n\u003ch3\u003eAmbient-Light Detection\u003c\/h3\u003e\n\u003cp\u003eThe LDR responds to the amount of surrounding light reaching its photosensitive surface.\u003c\/p\u003e\n\u003ch3\u003eSignal Comparison\u003c\/h3\u003e\n\u003cp\u003eThe sensor module evaluates the detected light condition against its configured sensitivity threshold.\u003c\/p\u003e\n\u003ch3\u003eTransistor Switching\u003c\/h3\u003e\n\u003cp\u003eThe module’s digital-output signal controls a BC547 NPN transistor through a 10K resistor.\u003c\/p\u003e\n\u003ch3\u003eDual Street-Light Response\u003c\/h3\u003e\n\u003cp\u003eThe transistor switches the electrical path controlling the two white LED street lights.\u003c\/p\u003e\n\u003cp\u003eTogether, these stages create a clear functional journey:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAmbient Light → LDR Sensor → Comparator Output → BC547 Transistor → Dual LED Street Lights\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe model brings the input, control and output stages together so students can see how a complete automatic system responds to changing environmental conditions.\u003c\/p\u003e\n\u003ch1\u003eSmart Features\u003c\/h1\u003e\n\u003ch2\u003eAutomatic Light Control\u003c\/h2\u003e\n\u003cp\u003eThe LDR sensor responds to surrounding light and controls the model street lights automatically through the connected electronic circuit.\u003c\/p\u003e\n\u003ch2\u003eEnergy-Saving Concept\u003c\/h2\u003e\n\u003cp\u003eThe model demonstrates the energy-saving idea of keeping the street lights off under sufficient light and switching them on when darkness is detected.\u003c\/p\u003e\n\u003cp\u003eIt does not measure or guarantee any specific electricity saving.\u003c\/p\u003e\n\u003ch2\u003eTransistor Switching\u003c\/h2\u003e\n\u003cp\u003eThe BC547 transistor operates as an electronic switch and controls the street lights according to the signal received from the sensor module.\u003c\/p\u003e\n\u003ch2\u003eReverse-Polarity Protection\u003c\/h2\u003e\n\u003cp\u003eThe 1N4007 diode helps protect the circuit from reverse current if the battery is accidentally connected with incorrect polarity.\u003c\/p\u003e\n\u003cp\u003eThis is an additional protective feature and does not mean that reverse battery connection should be tested intentionally.\u003c\/p\u003e\n\u003ch2\u003eReal-World Application\u003c\/h2\u003e\n\u003cp\u003eThe model helps explain selected concepts associated with automatic public lighting, sensor-based infrastructure and smart-city learning.\u003c\/p\u003e\n\u003cp\u003eIt is a simplified educational representation and not a substitute for an actual public-lighting system.\u003c\/p\u003e\n\u003ch1\u003eWhat’s in the Pre-Wired Kit?\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eBase sheet with road-layout graphic\u003c\/li\u003e\n\u003cli\u003eSmall toy car representing road traffic\u003c\/li\u003e\n\u003cli\u003eTwo street-light poles\u003c\/li\u003e\n\u003cli\u003eTwo pre-soldered white LED street lights\u003c\/li\u003e\n\u003cli\u003eTwo pre-installed bottom-to-top anchor screws\u003c\/li\u003e\n\u003cli\u003eWooden electronics-mounting block\u003c\/li\u003e\n\u003cli\u003eGeneral-purpose circuit board\u003c\/li\u003e\n\u003cli\u003eBC547 NPN transistor\u003c\/li\u003e\n\u003cli\u003e10K resistor\u003c\/li\u003e\n\u003cli\u003e1N4007 reverse-polarity protection diode\u003c\/li\u003e\n\u003cli\u003eLDR light-sensor module\u003c\/li\u003e\n\u003cli\u003eOnboard sensitivity-adjustment potentiometer\u003c\/li\u003e\n\u003cli\u003eThree jumper wires\u003c\/li\u003e\n\u003cli\u003eVCC, GND and digital-output connections\u003c\/li\u003e\n\u003cli\u003e9V battery snap connector\u003c\/li\u003e\n\u003cli\u003ePre-connected electrical wiring\u003c\/li\u003e\n\u003cli\u003ePre-wired educational working model\u003c\/li\u003e\n\u003cli\u003eDedicated QR access to the digital instruction manual\u003c\/li\u003e\n\u003cli\u003eSeparate dedicated QR access to the working demonstration video\u003c\/li\u003e\n\u003cli\u003eDetailed full-colour digital learning guide\u003c\/li\u003e\n\u003cli\u003eStep-by-step actual-product demonstration video\u003c\/li\u003e\n\u003cli\u003eIllustrated component explanations\u003c\/li\u003e\n\u003cli\u003eStreet-light pole attachment guidance\u003c\/li\u003e\n\u003cli\u003eBattery-connection instructions\u003c\/li\u003e\n\u003cli\u003eLDR light-and-darkness testing guidance\u003c\/li\u003e\n\u003cli\u003eAutomatic light-control explanation\u003c\/li\u003e\n\u003cli\u003eBC547 transistor-switching explanation\u003c\/li\u003e\n\u003cli\u003e10K resistor explanation\u003c\/li\u003e\n\u003cli\u003eReverse-polarity protection explanation\u003c\/li\u003e\n\u003cli\u003eTesting and troubleshooting support\u003c\/li\u003e\n\u003cli\u003eSafety, care and storage guidance\u003c\/li\u003e\n\u003cli\u003eLearning recap and project-support material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe manual and demonstration video are accessed through \u003cstrong\u003eseparate dedicated QR codes\u003c\/strong\u003e, allowing students to open each resource independently.\u003c\/p\u003e\n\u003ch1\u003eRequired Separately\u003c\/h1\u003e\n\u003ch2\u003eOne Fresh 9V Battery\u003c\/h2\u003e\n\u003cp\u003eThe model requires one standard 9V battery.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBattery is not included.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse a fresh battery for reliable demonstration performance.\u003c\/p\u003e\n\u003cp\u003eFor repeated classroom activities or science exhibitions, keeping a spare fresh battery available is recommended.\u003c\/p\u003e\n\u003cp\u003eDisconnect the battery immediately after completing each demonstration.\u003c\/p\u003e\n\u003cp\u003eNever store the model with the battery connected.\u003c\/p\u003e\n\u003ch1\u003eProduct Specifications\u003c\/h1\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct name\u003c\/td\u003e\n\u003ctd\u003eSmart Street Light\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel description\u003c\/td\u003e\n\u003ctd\u003eAutomatic Street Light (LDR Sensor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eGo Science Classroom Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct classification\u003c\/td\u003e\n\u003ctd\u003eEducational Concept Model Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProject classification\u003c\/td\u003e\n\u003ctd\u003eSchool Project \u0026amp; Demonstration Model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended grades\u003c\/td\u003e\n\u003ctd\u003eGrades 7–12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary demonstration\u003c\/td\u003e\n\u003ctd\u003eAutomatic street-light control according to ambient light\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnvironmental input\u003c\/td\u003e\n\u003ctd\u003eAmbient light and simulated darkness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary sensor\u003c\/td\u003e\n\u003ctd\u003eLDR light-sensor module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor type\u003c\/td\u003e\n\u003ctd\u003eCdS light-dependent photoresistor with comparator circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitivity control\u003c\/td\u003e\n\u003ctd\u003eOnboard adjustable potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor connections\u003c\/td\u003e\n\u003ctd\u003eVCC, GND and DO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectronic switch\u003c\/td\u003e\n\u003ctd\u003eBC547 NPN transistor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBC547 reference\u003c\/td\u003e\n\u003ctd\u003eNPN transistor; maximum collector current approximately 100 mA; VCEO approximately 45 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase resistor\u003c\/td\u003e\n\u003ctd\u003e10K, ¼-watt resistor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection component\u003c\/td\u003e\n\u003ctd\u003e1N4007 reverse-polarity protection diode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1N4007 reference\u003c\/td\u003e\n\u003ctd\u003eRectifier diode; approximately 1 A rating and 1000 V peak inverse voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLighting output\u003c\/td\u003e\n\u003ctd\u003eTwo pre-soldered white LED street lights\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLED type\u003c\/td\u003e\n\u003ctd\u003eTwo pre-soldered 5 mm white LEDs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of street-light poles\u003c\/td\u003e\n\u003ctd\u003eTwo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePole installation\u003c\/td\u003e\n\u003ctd\u003eFitted onto two pre-installed anchor screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower requirement\u003c\/td\u003e\n\u003ctd\u003eOne 9V battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery included\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical preparation\u003c\/td\u003e\n\u003ctd\u003ePre-wired\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContextual display\u003c\/td\u003e\n\u003ctd\u003eRoad-layout base with toy car\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital manual\u003c\/td\u003e\n\u003ctd\u003eIncluded through a dedicated manual QR code\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDemonstration video\u003c\/td\u003e\n\u003ctd\u003eDedicated video QR, this product page, Go Science website and official Go Science YouTube channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApproximate length\u003c\/td\u003e\n\u003ctd\u003e16 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApproximate width\u003c\/td\u003e\n\u003ctd\u003e11 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApproximate assembled height\u003c\/td\u003e\n\u003ctd\u003e15 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApproximate height without poles\u003c\/td\u003e\n\u003ctd\u003e3 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesigned and assembled\u003c\/td\u003e\n\u003ctd\u003eDesigned \u0026amp; Assembled in India\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended use\u003c\/td\u003e\n\u003ctd\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\u003eProduct dimensions are approximate.\u003c\/p\u003e\n\u003cp\u003eProduct colours, toy-car design, wire routing, pole finish, component placement and minor assembly details may vary according to manufacturing, component availability and assembly updates.\u003c\/p\u003e\n\u003ch1\u003eA Complete Guided Learning Experience\u003c\/h1\u003e\n\u003ch2\u003eWorking model, digital manual and video demonstration—all connected\u003c\/h2\u003e\n\u003cp\u003eEvery Go Science Classroom Series kit is supported by guided learning resources that help students identify the components, understand the concept, prepare the model, conduct the demonstration and explain their observations confidently.\u003c\/p\u003e\n\u003cp\u003eThis kit provides access to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA detailed full-colour digital instruction manual\u003c\/li\u003e\n\u003cli\u003eIllustrated product and component explanations\u003c\/li\u003e\n\u003cli\u003eComplete kit-contents guidance\u003c\/li\u003e\n\u003cli\u003eStreet-light pole attachment instructions\u003c\/li\u003e\n\u003cli\u003eBattery-connection guidance\u003c\/li\u003e\n\u003cli\u003eLDR light-sensing explanations\u003c\/li\u003e\n\u003cli\u003eComparator and sensitivity-control guidance\u003c\/li\u003e\n\u003cli\u003eBC547 transistor-switching explanation\u003c\/li\u003e\n\u003cli\u003e10K resistor explanation\u003c\/li\u003e\n\u003cli\u003e1N4007 protection-diode explanation\u003c\/li\u003e\n\u003cli\u003eAutomatic daylight-and-darkness operating sequence\u003c\/li\u003e\n\u003cli\u003eStep-by-step demonstration instructions\u003c\/li\u003e\n\u003cli\u003eTroubleshooting support\u003c\/li\u003e\n\u003cli\u003eSafety, care and storage guidance\u003c\/li\u003e\n\u003cli\u003eA dedicated actual-product working video\u003c\/li\u003e\n\u003cli\u003eIndependent QR access to the digital manual\u003c\/li\u003e\n\u003cli\u003eIndependent QR access to the demonstration video\u003c\/li\u003e\n\u003cli\u003eProduct-page and product-gallery video access\u003c\/li\u003e\n\u003cli\u003eGo Science website video access\u003c\/li\u003e\n\u003cli\u003eOfficial Go Science YouTube video access\u003c\/li\u003e\n\u003cli\u003eLearning recap and project-support material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe guided learning journey takes students through:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExplore → Understand → Watch → Prepare → Connect → Test → Observe → Explain → Complete\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStudents can read the manual, watch the actual model in operation and revisit both resources while preparing for a school project, classroom presentation, science exhibition, project report or viva.\u003c\/p\u003e\n\u003ch1\u003eDetailed Full-Colour Digital Instruction Manual Included\u003c\/h1\u003e\n\u003ch2\u003eScan, understand and revisit whenever needed\u003c\/h2\u003e\n\u003cp\u003eA dedicated QR code supplied with the kit provides access to the product-specific \u003cstrong\u003eSmart Street Light digital instruction manual\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe manual QR code is independent of the demonstration-video QR code.\u003c\/p\u003e\n\u003cp\u003eThe digital manual can be opened on a compatible phone, tablet or computer and used during:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInitial project preparation\u003c\/li\u003e\n\u003cli\u003eProduct identification\u003c\/li\u003e\n\u003cli\u003eComponent identification\u003c\/li\u003e\n\u003cli\u003eStreet-light pole attachment\u003c\/li\u003e\n\u003cli\u003eBattery connection\u003c\/li\u003e\n\u003cli\u003eDemonstration setup\u003c\/li\u003e\n\u003cli\u003eLDR sensor understanding\u003c\/li\u003e\n\u003cli\u003eAutomatic-switching explanation\u003c\/li\u003e\n\u003cli\u003eClassroom learning\u003c\/li\u003e\n\u003cli\u003eScience-exhibition practice\u003c\/li\u003e\n\u003cli\u003eProject-report preparation\u003c\/li\u003e\n\u003cli\u003eViva preparation\u003c\/li\u003e\n\u003cli\u003eTroubleshooting\u003c\/li\u003e\n\u003cli\u003eSafety and storage\u003c\/li\u003e\n\u003cli\u003eRevision and concept recap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe manual explains:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe complete model layout\u003c\/li\u003e\n\u003cli\u003eThe supplied components\u003c\/li\u003e\n\u003cli\u003eThe LDR light-sensing principle\u003c\/li\u003e\n\u003cli\u003eThe comparator-based control stage\u003c\/li\u003e\n\u003cli\u003eBC547 transistor switching\u003c\/li\u003e\n\u003cli\u003eThe role of the 10K resistor\u003c\/li\u003e\n\u003cli\u003eReverse-polarity protection\u003c\/li\u003e\n\u003cli\u003eCorrect pole fitting\u003c\/li\u003e\n\u003cli\u003eCorrect battery connection\u003c\/li\u003e\n\u003cli\u003eDaylight and darkness testing\u003c\/li\u003e\n\u003cli\u003eAutomatic dual-light response\u003c\/li\u003e\n\u003cli\u003eTroubleshooting\u003c\/li\u003e\n\u003cli\u003eSafe shutdown\u003c\/li\u003e\n\u003cli\u003eStorage guidance\u003c\/li\u003e\n\u003cli\u003eEducational concepts\u003c\/li\u003e\n\u003cli\u003eLearning recap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eInternet access and a compatible QR-scanning device are required to open the digital manual.\u003c\/p\u003e\n\u003ch1\u003eStep-by-Step Video Demonstration Included\u003c\/h1\u003e\n\u003ch2\u003eWatch the actual model before conducting the activity\u003c\/h2\u003e\n\u003cp\u003eA separate dedicated QR code supplied with the kit provides access to the \u003cstrong\u003eSmart Street Light working demonstration video\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe video QR code is independent of the digital-manual QR code.\u003c\/p\u003e\n\u003cp\u003eThe actual-product video helps students, parents and teachers understand:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe complete Smart Street Light model\u003c\/li\u003e\n\u003cli\u003eThe road-layout base and toy car\u003c\/li\u003e\n\u003cli\u003eThe two detachable street-light poles\u003c\/li\u003e\n\u003cli\u003eThe pre-installed pole-mounting screws\u003c\/li\u003e\n\u003cli\u003eCorrect attachment of the poles\u003c\/li\u003e\n\u003cli\u003eThe LDR sensor module\u003c\/li\u003e\n\u003cli\u003eThe circuit board and transistor circuit\u003c\/li\u003e\n\u003cli\u003eThe jumper-wire connections\u003c\/li\u003e\n\u003cli\u003eCorrect 9V battery connection\u003c\/li\u003e\n\u003cli\u003eThe normal ambient-light condition\u003c\/li\u003e\n\u003cli\u003eHow darkness is simulated by covering the LDR\u003c\/li\u003e\n\u003cli\u003eBoth LED street lights switching on\u003c\/li\u003e\n\u003cli\u003eBoth LED street lights switching off when light returns\u003c\/li\u003e\n\u003cli\u003eCorrect battery disconnection after demonstration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe video can be accessed in three convenient ways:\u003c\/p\u003e\n\u003ch2\u003eThis Product Page and Product Gallery\u003c\/h2\u003e\n\u003cp\u003eThe working video is available alongside the product photographs and information on this Go Science product page.\u003c\/p\u003e\n\u003cp\u003eParents, teachers and students can view the actual model before purchase and revisit the demonstration whenever required.\u003c\/p\u003e\n\u003ch2\u003eOfficial Go Science YouTube Channel\u003c\/h2\u003e\n\u003cp\u003eThe complete working demonstration is also available through the official Go Science YouTube channel for convenient viewing, revision and sharing.\u003c\/p\u003e\n\u003ch2\u003eDedicated Video QR Code\u003c\/h2\u003e\n\u003cp\u003eA separate video QR code supplied with the kit provides direct access to the demonstration whenever students need to revisit the setup or operating sequence.\u003c\/p\u003e\n\u003cp\u003eThis creates a continuous guided experience:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eView → Scan → Watch → Prepare → Connect → Demonstrate → Rewatch\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eInternet access and a compatible QR-scanning device are required to open the online video.\u003c\/p\u003e\n\u003ch1\u003ePre-Wired for Direct Exploration\u003c\/h1\u003e\n\u003ch2\u003eBegin with a prepared working foundation\u003c\/h2\u003e\n\u003cp\u003eThe LDR module, general-purpose circuit board, BC547 transistor, 10K resistor, 1N4007 diode, jumper-wire connections, battery connector and LED wiring are integrated into the model as one pre-wired electrical system.\u003c\/p\u003e\n\u003cp\u003eThe two street-light poles are fitted onto the prepared anchor screws before demonstration.\u003c\/p\u003e\n\u003cp\u003eThis working foundation allows students to move directly into meaningful exploration:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIdentify the LDR sensor\u003c\/li\u003e\n\u003cli\u003eExamine the electronic control board\u003c\/li\u003e\n\u003cli\u003eUnderstand the comparator output\u003c\/li\u003e\n\u003cli\u003eIdentify the transistor-switching stage\u003c\/li\u003e\n\u003cli\u003eFit the two street-light poles\u003c\/li\u003e\n\u003cli\u003eConnect the required 9V battery\u003c\/li\u003e\n\u003cli\u003eObserve the daylight condition\u003c\/li\u003e\n\u003cli\u003eSimulate darkness\u003c\/li\u003e\n\u003cli\u003eWatch both LEDs illuminate\u003c\/li\u003e\n\u003cli\u003eRestore the light and observe the reset\u003c\/li\u003e\n\u003cli\u003eRun repeated demonstrations\u003c\/li\u003e\n\u003cli\u003eCompare different light conditions\u003c\/li\u003e\n\u003cli\u003eRecord and compare observations\u003c\/li\u003e\n\u003cli\u003eAdjust the sensor threshold under supervision\u003c\/li\u003e\n\u003cli\u003eUnderstand the role of each component\u003c\/li\u003e\n\u003cli\u003eExplain the automatic system confidently\u003c\/li\u003e\n\u003cli\u003eDevelop further automation ideas\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe model is designed to be:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eObserved → Tested → Retested → Understood → Explained → Built Upon\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePre-wired does not mean passive.\u003c\/p\u003e\n\u003cp\u003eIt provides a prepared working foundation from which investigation, observation, explanation and further learning can begin.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eWatch the Complete System Respond\u003c\/h1\u003e\n\u003ch2\u003e1. Prepare the Model\u003c\/h2\u003e\n\u003cp\u003ePlace the model on a clean, flat, stable and dry surface.\u003c\/p\u003e\n\u003cp\u003eCheck that:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe electronic components are secure\u003c\/li\u003e\n\u003cli\u003eThe jumper wires are connected\u003c\/li\u003e\n\u003cli\u003eThe battery is not yet attached\u003c\/li\u003e\n\u003cli\u003eThe LDR surface is unobstructed\u003c\/li\u003e\n\u003cli\u003eBoth street-light poles are ready for fitting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e2. Fit the Street-Light Poles\u003c\/h2\u003e\n\u003cp\u003eLocate the two anchor screws pre-installed in the base.\u003c\/p\u003e\n\u003cp\u003eAlign the hollow bottom of each street-light pole with its corresponding mounting screw.\u003c\/p\u003e\n\u003cp\u003eGently insert and rotate each pole until it stands upright and securely fitted.\u003c\/p\u003e\n\u003cp\u003eDo not force or overtighten the poles.\u003c\/p\u003e\n\u003ch2\u003e3. Check the Connections\u003c\/h2\u003e\n\u003cp\u003eVerify that the three jumper wires remain securely connected:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVCC\u003c\/li\u003e\n\u003cli\u003eGND\u003c\/li\u003e\n\u003cli\u003eDO\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDo not pull, stretch or sharply bend the wires.\u003c\/p\u003e\n\u003ch2\u003e4. Connect the Power\u003c\/h2\u003e\n\u003cp\u003eAttach one fresh 9V battery to the supplied snap connector using the correct terminal orientation.\u003c\/p\u003e\n\u003ch2\u003e5. Observe the Daylight Condition\u003c\/h2\u003e\n\u003cp\u003eAllow sufficient ambient room light to reach the LDR.\u003c\/p\u003e\n\u003cp\u003eBoth LED street lights should remain switched off.\u003c\/p\u003e\n\u003ch2\u003e6. Simulate Darkness\u003c\/h2\u003e\n\u003cp\u003eCover the LDR completely using your hand or a suitable opaque cover.\u003c\/p\u003e\n\u003cp\u003eDo not press hard on the sensor module.\u003c\/p\u003e\n\u003ch2\u003e7. Watch Both Street Lights Illuminate\u003c\/h2\u003e\n\u003cp\u003eWhen darkness is detected:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe sensor condition changes\u003c\/li\u003e\n\u003cli\u003eThe comparator output changes\u003c\/li\u003e\n\u003cli\u003eThe signal reaches the transistor circuit\u003c\/li\u003e\n\u003cli\u003eThe BC547 transistor switches on\u003c\/li\u003e\n\u003cli\u003eThe LED circuit is completed\u003c\/li\u003e\n\u003cli\u003eBoth street lights illuminate automatically\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e8. Restore the Light\u003c\/h2\u003e\n\u003cp\u003eRemove the cover and allow ambient light to reach the LDR again.\u003c\/p\u003e\n\u003cp\u003eThe control condition resets and both LEDs switch off automatically.\u003c\/p\u003e\n\u003ch2\u003e9. Repeat the Demonstration\u003c\/h2\u003e\n\u003cp\u003eRepeat the covering and uncovering sequence and compare the response.\u003c\/p\u003e\n\u003ch2\u003e10. Reset the Model\u003c\/h2\u003e\n\u003cp\u003eDisconnect the 9V battery immediately after completing the demonstration.\u003c\/p\u003e\n\u003cp\u003eThe complete sequence is:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLight Present → Street Lights OFF → Darkness Detected → Street Lights ON → Light Restored → Street Lights OFF\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch1\u003eExplore the Automatic Light-Sensing System\u003c\/h1\u003e\n\u003ch2\u003eSee how surrounding light controls an electrical output\u003c\/h2\u003e\n\u003cp\u003eLDR stands for \u003cstrong\u003eLight Dependent Resistor\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eAn LDR changes its electrical resistance according to the amount of light reaching its photosensitive surface.\u003c\/p\u003e\n\u003ch3\u003eDaylight or Brighter Condition\u003c\/h3\u003e\n\u003cp\u003eWhen sufficient light reaches the LDR:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe LDR responds to the brighter condition.\u003c\/li\u003e\n\u003cli\u003eThe sensor module maintains the daylight-state output.\u003c\/li\u003e\n\u003cli\u003eThe BC547 transistor remains switched off.\u003c\/li\u003e\n\u003cli\u003eBoth LED street lights remain off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDarkness or Low-Light Condition\u003c\/h3\u003e\n\u003cp\u003eWhen the LDR is covered:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe amount of light reaching the sensor reduces.\u003c\/li\u003e\n\u003cli\u003eThe electrical condition of the LDR changes.\u003c\/li\u003e\n\u003cli\u003eThe comparator changes its digital output.\u003c\/li\u003e\n\u003cli\u003eThe transistor receives the switching signal.\u003c\/li\u003e\n\u003cli\u003eBoth LED street lights turn on automatically.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eStudents can explore:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAmbient-light detection\u003c\/li\u003e\n\u003cli\u003eLight-dependent resistance\u003c\/li\u003e\n\u003cli\u003eDaylight and darkness\u003c\/li\u003e\n\u003cli\u003eEnvironmental sensing\u003c\/li\u003e\n\u003cli\u003eComparator outputs\u003c\/li\u003e\n\u003cli\u003eSwitching thresholds\u003c\/li\u003e\n\u003cli\u003eAutomatic control\u003c\/li\u003e\n\u003cli\u003eInput and output devices\u003c\/li\u003e\n\u003cli\u003eCause-and-effect relationships\u003c\/li\u003e\n\u003cli\u003eThe energy-saving concept of automatic public lighting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe model detects changes in surrounding light.\u003c\/p\u003e\n\u003cp\u003eIt does not provide a calibrated numerical measurement of light intensity.\u003c\/p\u003e\n\u003ch1\u003eFollow the Automatic Lighting Journey\u003c\/h1\u003e\n\u003ch2\u003eSee the complete sensor-to-light pathway\u003c\/h2\u003e\n\u003cp\u003eThe physical and electronic layout allows students to identify every stage of the automatic system.\u003c\/p\u003e\n\u003ch3\u003eEnvironmental Input\u003c\/h3\u003e\n\u003cp\u003eAmbient light or simulated darkness reaches the LDR.\u003c\/p\u003e\n\u003ch3\u003eDetection\u003c\/h3\u003e\n\u003cp\u003eThe light-dependent resistor responds to the surrounding light condition.\u003c\/p\u003e\n\u003ch3\u003eComparison\u003c\/h3\u003e\n\u003cp\u003eThe comparator evaluates the detected condition against the configured sensitivity threshold.\u003c\/p\u003e\n\u003ch3\u003eControl Signal\u003c\/h3\u003e\n\u003cp\u003eThe sensor module produces a digital-output signal.\u003c\/p\u003e\n\u003ch3\u003eElectronic Switching\u003c\/h3\u003e\n\u003cp\u003eThe BC547 transistor responds to the control signal through the 10K resistor.\u003c\/p\u003e\n\u003ch3\u003eLighting Output\u003c\/h3\u003e\n\u003cp\u003eThe two LED street lights switch on or off.\u003c\/p\u003e\n\u003cp\u003eStudents can identify the essential automatic-control stages:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLight Condition → LDR → Comparator → Digital Output → BC547 Transistor → Dual LEDs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe model helps students connect sensor electronics with a visible public-lighting application rather than viewing the circuit only as an abstract diagram.\u003c\/p\u003e\n\u003ch1\u003eUnderstand the Comparator and Sensitivity Control\u003c\/h1\u003e\n\u003ch2\u003eDecide when the lighting response should occur\u003c\/h2\u003e\n\u003cp\u003eThe LDR module includes comparator electronics and an adjustable potentiometer.\u003c\/p\u003e\n\u003cp\u003eThe comparator evaluates the changing electrical condition of the LDR and determines when the digital output should switch.\u003c\/p\u003e\n\u003cp\u003eThe potentiometer allows the switching threshold to be adjusted.\u003c\/p\u003e\n\u003cp\u003eStudents can observe that the transition point may depend on:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAmbient room brightness\u003c\/li\u003e\n\u003cli\u003eDistance from a light source\u003c\/li\u003e\n\u003cli\u003eDirection of the light\u003c\/li\u003e\n\u003cli\u003eAmount of sensor coverage\u003c\/li\u003e\n\u003cli\u003eLDR orientation\u003c\/li\u003e\n\u003cli\u003ePotentiometer setting\u003c\/li\u003e\n\u003cli\u003eBattery condition\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSensitivity adjustment should be performed carefully using a suitable small screwdriver and preferably under adult or teacher supervision.\u003c\/p\u003e\n\u003cp\u003eA small adjustment may change when the street lights switch on or off.\u003c\/p\u003e\n\u003ch1\u003eExplore BC547 Transistor Switching\u003c\/h1\u003e\n\u003ch2\u003eUse a control signal to operate two LEDs\u003c\/h2\u003e\n\u003cp\u003eThe BC547 NPN transistor functions as an electronic switch.\u003c\/p\u003e\n\u003cp\u003eThe LDR module detects the surrounding light condition, while the transistor controls the electrical path supplying the two street-light LEDs.\u003c\/p\u003e\n\u003ch3\u003eTransistor OFF\u003c\/h3\u003e\n\u003cp\u003eUnder sufficient ambient light:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe sensor module maintains the daylight-state output.\u003c\/li\u003e\n\u003cli\u003eThe transistor remains in its non-conducting state.\u003c\/li\u003e\n\u003cli\u003eBoth LED street lights remain off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTransistor ON\u003c\/h3\u003e\n\u003cp\u003eWhen darkness is detected:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe module’s digital output changes.\u003c\/li\u003e\n\u003cli\u003eThe signal reaches the transistor through the 10K resistor.\u003c\/li\u003e\n\u003cli\u003eThe transistor enters its conducting state.\u003c\/li\u003e\n\u003cli\u003eThe LED circuit is completed.\u003c\/li\u003e\n\u003cli\u003eBoth street lights illuminate automatically.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis demonstrates an important automatic-control structure:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSensor → Control Signal → Electronic Switch → Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch1\u003eWhy the 10K Resistor Matters\u003c\/h1\u003e\n\u003ch2\u003eControl the transistor’s base current\u003c\/h2\u003e\n\u003cp\u003eThe 10K resistor is positioned within the transistor-control path.\u003c\/p\u003e\n\u003cp\u003eIt helps limit the current reaching the transistor’s base terminal.\u003c\/p\u003e\n\u003cp\u003eThis supports controlled transistor operation and helps avoid excessive base current.\u003c\/p\u003e\n\u003cp\u003eStudents can use this component to discuss:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eElectrical resistance\u003c\/li\u003e\n\u003cli\u003eCurrent limiting\u003c\/li\u003e\n\u003cli\u003eTransistor biasing\u003c\/li\u003e\n\u003cli\u003eElectronic switching\u003c\/li\u003e\n\u003cli\u003eCircuit control\u003c\/li\u003e\n\u003cli\u003eComponent selection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe resistor is an essential part of the working circuit and should not be removed or bypassed.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eReverse-Polarity Protection\u003c\/h1\u003e\n\u003ch2\u003eAdditional protection for the pre-wired circuit\u003c\/h2\u003e\n\u003cp\u003eThe circuit includes a \u003cstrong\u003e1N4007 diode\u003c\/strong\u003e within the power path.\u003c\/p\u003e\n\u003cp\u003eThe diode helps block reverse current if the 9V battery is accidentally connected with incorrect polarity.\u003c\/p\u003e\n\u003cp\u003eThis helps reduce the possibility of reverse current reaching the sensor and transistor circuit.\u003c\/p\u003e\n\u003cp\u003eThe protection feature does not mean the battery should intentionally be connected in reverse.\u003c\/p\u003e\n\u003cp\u003eAlways:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCheck the battery terminals before connection\u003c\/li\u003e\n\u003cli\u003eConnect the battery using the correct orientation\u003c\/li\u003e\n\u003cli\u003eDisconnect it immediately if the model behaves unusually\u003c\/li\u003e\n\u003cli\u003eNever intentionally test a reverse battery connection\u003c\/li\u003e\n\u003cli\u003eNever short-circuit the battery snap terminals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\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\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\"\u003eSystem stage\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eComponent\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eFunction\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnvironmental input\u003c\/td\u003e\n\u003ctd\u003eAmbient light or simulated darkness\u003c\/td\u003e\n\u003ctd\u003eProvides the changing external condition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetection\u003c\/td\u003e\n\u003ctd\u003eLDR photoresistor\u003c\/td\u003e\n\u003ctd\u003eResponds to the surrounding light\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComparison\u003c\/td\u003e\n\u003ctd\u003eSensor-module comparator\u003c\/td\u003e\n\u003ctd\u003eEvaluates the detected condition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThreshold adjustment\u003c\/td\u003e\n\u003ctd\u003ePotentiometer\u003c\/td\u003e\n\u003ctd\u003eAdjusts the switching point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl output\u003c\/td\u003e\n\u003ctd\u003eDO connection\u003c\/td\u003e\n\u003ctd\u003eCommunicates the sensor state\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent control\u003c\/td\u003e\n\u003ctd\u003e10K resistor\u003c\/td\u003e\n\u003ctd\u003eLimits transistor-base current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectronic switch\u003c\/td\u003e\n\u003ctd\u003eBC547 NPN transistor\u003c\/td\u003e\n\u003ctd\u003eActivates or deactivates the LED circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit protection\u003c\/td\u003e\n\u003ctd\u003e1N4007 diode\u003c\/td\u003e\n\u003ctd\u003eHelps block reverse-polarity current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLighting output\u003c\/td\u003e\n\u003ctd\u003eTwo LED street lights\u003c\/td\u003e\n\u003ctd\u003eRepresent automatic public lighting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower source\u003c\/td\u003e\n\u003ctd\u003e9V battery\u003c\/td\u003e\n\u003ctd\u003eSupplies electrical energy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication context\u003c\/td\u003e\n\u003ctd\u003eRoad-layout base and toy car\u003c\/td\u003e\n\u003ctd\u003eRepresents a street environment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLearning support\u003c\/td\u003e\n\u003ctd\u003eDigital manual and video\u003c\/td\u003e\n\u003ctd\u003eSupports 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\u003ch1\u003eA Smart-City Context Students Can Understand\u003c\/h1\u003e\n\u003ch2\u003eConnect environmental sensing with public infrastructure\u003c\/h2\u003e\n\u003cp\u003eThe road, toy vehicle and two street-light poles provide a recognisable application context.\u003c\/p\u003e\n\u003cp\u003eEach element represents part of the complete system:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe road represents a public street.\u003c\/li\u003e\n\u003cli\u003eThe toy car represents road traffic.\u003c\/li\u003e\n\u003cli\u003eThe LDR represents environmental sensing.\u003c\/li\u003e\n\u003cli\u003eThe comparator evaluates the light condition.\u003c\/li\u003e\n\u003cli\u003eThe BC547 transistor performs electronic switching.\u003c\/li\u003e\n\u003cli\u003eThe two LEDs represent street lighting.\u003c\/li\u003e\n\u003cli\u003eThe battery powers the educational model.\u003c\/li\u003e\n\u003cli\u003eThe automatic response represents a smart-city lighting concept.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe model helps students explain:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWhy street lights are not required during bright daylight\u003c\/li\u003e\n\u003cli\u003eHow automatic control may avoid unnecessary daytime lighting\u003c\/li\u003e\n\u003cli\u003eHow sensors respond to environmental conditions\u003c\/li\u003e\n\u003cli\u003eHow transistors control electrical outputs\u003c\/li\u003e\n\u003cli\u003eWhy public roads require lighting after dark\u003c\/li\u003e\n\u003cli\u003eHow automated systems may support smart-city infrastructure\u003c\/li\u003e\n\u003cli\u003eHow environmental inputs can control electronic systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe model is a simplified educational representation.\u003c\/p\u003e\n\u003cp\u003eReal public-lighting systems may use different power sources, controllers, timers, relays, sensors, protective housings, communication systems and professional installation.\u003c\/p\u003e\n\u003ch1\u003eTest. Observe. Discover.\u003c\/h1\u003e\n\u003ch2\u003eLight-and-Darkness Test\u003c\/h2\u003e\n\u003cp\u003eBegin with the LDR fully exposed to normal ambient light.\u003c\/p\u003e\n\u003cp\u003eCover the sensor and observe both LEDs.\u003c\/p\u003e\n\u003cp\u003eRemove the cover 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\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\"\u003eTest condition\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eSensor condition\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eExpected street-light response\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBefore testing\u003c\/td\u003e\n\u003ctd\u003eLDR exposed to sufficient light\u003c\/td\u003e\n\u003ctd\u003eBoth LEDs remain off\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLDR covered\u003c\/td\u003e\n\u003ctd\u003eDarkness simulated\u003c\/td\u003e\n\u003ctd\u003eBoth LEDs switch on\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLDR partly covered\u003c\/td\u003e\n\u003ctd\u003eReduced light\u003c\/td\u003e\n\u003ctd\u003eResponse depends on the threshold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCover removed\u003c\/td\u003e\n\u003ctd\u003eLight restored\u003c\/td\u003e\n\u003ctd\u003eBoth LEDs switch off\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\u003ePartial-Cover Test\u003c\/h2\u003e\n\u003cp\u003eCover only part of the LDR.\u003c\/p\u003e\n\u003cp\u003eObserve whether the street lights switch on.\u003c\/p\u003e\n\u003cp\u003eGradually increase the covered area and record the response.\u003c\/p\u003e\n\u003cp\u003eStudents can investigate how the result depends on:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAvailable ambient light\u003c\/li\u003e\n\u003cli\u003eAmount of sensor coverage\u003c\/li\u003e\n\u003cli\u003eSensor direction\u003c\/li\u003e\n\u003cli\u003eConfigured threshold\u003c\/li\u003e\n\u003cli\u003eDistance from a light source\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eLight-Distance Test\u003c\/h2\u003e\n\u003cp\u003ePlace the model at different distances from an indoor light source.\u003c\/p\u003e\n\u003cp\u003eStudents can record:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDistance from the light\u003c\/li\u003e\n\u003cli\u003eWhether the LEDs remained on or off\u003c\/li\u003e\n\u003cli\u003eWhether the response changed\u003c\/li\u003e\n\u003cli\u003eWhether the LDR faced the light directly\u003c\/li\u003e\n\u003cli\u003eWhether surrounding shadows affected the result\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSensor-Direction Test\u003c\/h2\u003e\n\u003cp\u003eTurn the model so the LDR faces different directions.\u003c\/p\u003e\n\u003cp\u003eObserve how its orientation affects the detected light condition.\u003c\/p\u003e\n\u003ch2\u003eSensitivity Test\u003c\/h2\u003e\n\u003cp\u003eUnder adult or teacher supervision, make a very small adjustment to the potentiometer.\u003c\/p\u003e\n\u003cp\u003eRepeat the light-and-darkness test and compare the switching point.\u003c\/p\u003e\n\u003cp\u003eAvoid forceful or unnecessary adjustment.\u003c\/p\u003e\n\u003ch2\u003eRepeatability Test\u003c\/h2\u003e\n\u003cp\u003eRepeat the same cover-and-uncover sequence several times.\u003c\/p\u003e\n\u003cp\u003eCompare:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eResponse speed\u003c\/li\u003e\n\u003cli\u003eLED brightness\u003c\/li\u003e\n\u003cli\u003eWhether both LEDs switch together\u003c\/li\u003e\n\u003cli\u003eWhether the result remains consistent\u003c\/li\u003e\n\u003cli\u003eWhether battery strength affects operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBattery-Condition Observation\u003c\/h2\u003e\n\u003cp\u003eCompare the model’s response using a fresh battery and a battery that has already been used for several demonstrations.\u003c\/p\u003e\n\u003cp\u003eA weak battery may result in:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDimmer LEDs\u003c\/li\u003e\n\u003cli\u003eInconsistent switching\u003c\/li\u003e\n\u003cli\u003eDelayed response\u003c\/li\u003e\n\u003cli\u003eReduced demonstration reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDo not use a damaged, leaking or unsuitable battery.\u003c\/p\u003e\n\u003ch2\u003eReset Test\u003c\/h2\u003e\n\u003cp\u003eObserve how quickly the LEDs turn off when ambient light reaches the LDR again.\u003c\/p\u003e\n\u003cp\u003eIf they remain on, check:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAmbient-light level\u003c\/li\u003e\n\u003cli\u003eSensor orientation\u003c\/li\u003e\n\u003cli\u003eSensitivity setting\u003c\/li\u003e\n\u003cli\u003eBattery condition\u003c\/li\u003e\n\u003cli\u003eJumper-wire connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eLearn Through Every Demonstration\u003c\/h1\u003e\n\u003ch2\u003eWatch\u003c\/h2\u003e\n\u003cp\u003eReview the actual-product demonstration video before beginning.\u003c\/p\u003e\n\u003ch2\u003ePredict\u003c\/h2\u003e\n\u003cp\u003eWhat will happen when the LDR is covered?\u003c\/p\u003e\n\u003ch2\u003ePrepare\u003c\/h2\u003e\n\u003cp\u003eFit the street-light poles and inspect the electrical connections.\u003c\/p\u003e\n\u003ch2\u003eConnect\u003c\/h2\u003e\n\u003cp\u003eAttach a fresh 9V battery using the correct polarity.\u003c\/p\u003e\n\u003ch2\u003eTest\u003c\/h2\u003e\n\u003cp\u003eExpose and cover the LDR.\u003c\/p\u003e\n\u003ch2\u003eObserve\u003c\/h2\u003e\n\u003cp\u003eWatch both LED street lights respond.\u003c\/p\u003e\n\u003ch2\u003eRecord\u003c\/h2\u003e\n\u003cp\u003eDocument the light condition and corresponding LED state.\u003c\/p\u003e\n\u003ch2\u003eCompare\u003c\/h2\u003e\n\u003cp\u003eRepeat the activity under different lighting conditions.\u003c\/p\u003e\n\u003ch2\u003eAnalyse\u003c\/h2\u003e\n\u003cp\u003eExplain how the LDR, comparator and transistor work together.\u003c\/p\u003e\n\u003ch2\u003eTroubleshoot\u003c\/h2\u003e\n\u003cp\u003eCheck the battery, sensor, jumper wires, sensitivity setting and pole connections.\u003c\/p\u003e\n\u003ch2\u003eExplain\u003c\/h2\u003e\n\u003cp\u003eDescribe the complete automatic-lighting sequence.\u003c\/p\u003e\n\u003ch2\u003eExtend\u003c\/h2\u003e\n\u003cp\u003eDevelop further questions about sensors, automation and energy conservation.\u003c\/p\u003e\n\u003ch1\u003eExplore Key Concepts\u003c\/h1\u003e\n\u003ch2\u003eLight Sensing\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAmbient-light detection\u003c\/li\u003e\n\u003cli\u003eLDR photoresistors\u003c\/li\u003e\n\u003cli\u003eDaylight and darkness\u003c\/li\u003e\n\u003cli\u003eSensor orientation\u003c\/li\u003e\n\u003cli\u003eSensitivity thresholds\u003c\/li\u003e\n\u003cli\u003eEnvironmental inputs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eElectrical Circuits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBattery-powered circuits\u003c\/li\u003e\n\u003cli\u003eCurrent flow\u003c\/li\u003e\n\u003cli\u003eResistors\u003c\/li\u003e\n\u003cli\u003eLEDs\u003c\/li\u003e\n\u003cli\u003eCircuit paths\u003c\/li\u003e\n\u003cli\u003eBattery polarity\u003c\/li\u003e\n\u003cli\u003eProtective diodes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eElectronic Switching\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBC547 NPN transistor\u003c\/li\u003e\n\u003cli\u003eNon-conducting state\u003c\/li\u003e\n\u003cli\u003eConducting state\u003c\/li\u003e\n\u003cli\u003eBase-current control\u003c\/li\u003e\n\u003cli\u003eDigital sensor output\u003c\/li\u003e\n\u003cli\u003eAutomatic control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAutomation and Control\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEnvironmental input\u003c\/li\u003e\n\u003cli\u003eSensor detection\u003c\/li\u003e\n\u003cli\u003eSignal comparison\u003c\/li\u003e\n\u003cli\u003eElectronic switching\u003c\/li\u003e\n\u003cli\u003eVisible output\u003c\/li\u003e\n\u003cli\u003eAutomatic reset\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSmart-City Learning\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAutomatic public lighting\u003c\/li\u003e\n\u003cli\u003eEnergy-saving concepts\u003c\/li\u003e\n\u003cli\u003eIntelligent infrastructure\u003c\/li\u003e\n\u003cli\u003ePublic-road lighting\u003c\/li\u003e\n\u003cli\u003eSensor-controlled systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePractical Investigation\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eControlled testing\u003c\/li\u003e\n\u003cli\u003eObservation tables\u003c\/li\u003e\n\u003cli\u003eThreshold comparison\u003c\/li\u003e\n\u003cli\u003eSensor orientation\u003c\/li\u003e\n\u003cli\u003eBattery comparison\u003c\/li\u003e\n\u003cli\u003eRepeatability\u003c\/li\u003e\n\u003cli\u003eTroubleshooting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eLearning Approach and Concept Mapping\u003c\/h1\u003e\n\u003cp\u003eThe Smart Street Light model is designed to support supervised, activity-based learning through:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExperiential learning\u003c\/li\u003e\n\u003cli\u003eProject-based learning\u003c\/li\u003e\n\u003cli\u003eConcept understanding\u003c\/li\u003e\n\u003cli\u003eObservation\u003c\/li\u003e\n\u003cli\u003eComparison\u003c\/li\u003e\n\u003cli\u003eProblem solving\u003c\/li\u003e\n\u003cli\u003ePractical demonstration\u003c\/li\u003e\n\u003cli\u003eStudent explanation\u003c\/li\u003e\n\u003cli\u003eProject-report preparation\u003c\/li\u003e\n\u003cli\u003eViva and presentation practice\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe model is designed around selected concepts relevant to Grades 7–12, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAmbient-light sensing\u003c\/li\u003e\n\u003cli\u003eLight-dependent resistance\u003c\/li\u003e\n\u003cli\u003eBasic electrical circuits\u003c\/li\u003e\n\u003cli\u003eInput and output devices\u003c\/li\u003e\n\u003cli\u003eComparator-based control\u003c\/li\u003e\n\u003cli\u003eTransistor switching\u003c\/li\u003e\n\u003cli\u003eCurrent-limiting resistors\u003c\/li\u003e\n\u003cli\u003eReverse-polarity protection\u003c\/li\u003e\n\u003cli\u003eAutomatic lighting\u003c\/li\u003e\n\u003cli\u003eEnergy-conservation concepts\u003c\/li\u003e\n\u003cli\u003eAutomation\u003c\/li\u003e\n\u003cli\u003eSmart-city infrastructure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe model may support classroom discussion and practical exploration of these concepts.\u003c\/p\u003e\n\u003cp\u003eThe depth, terminology and learning relevance may vary according to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStudent grade\u003c\/li\u003e\n\u003cli\u003eCurriculum\u003c\/li\u003e\n\u003cli\u003eDemonstration setup\u003c\/li\u003e\n\u003cli\u003eTeacher guidance\u003c\/li\u003e\n\u003cli\u003eSupervision\u003c\/li\u003e\n\u003cli\u003eClassroom use\u003c\/li\u003e\n\u003cli\u003eProject requirements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe learning approach can be represented as:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExperiential Learning → Project-Based Learning → Concept Understanding → Observation \u0026amp; Problem Solving\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch1\u003eOne Model. Multiple Learning Outcomes.\u003c\/h1\u003e\n\u003cp\u003eThe Smart Street Light model allows students to explore how:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAn LDR responds to surrounding light\u003c\/li\u003e\n\u003cli\u003eA light-sensitive component detects environmental change\u003c\/li\u003e\n\u003cli\u003eA comparator evaluates the sensor condition\u003c\/li\u003e\n\u003cli\u003eA potentiometer adjusts the switching threshold\u003c\/li\u003e\n\u003cli\u003eA digital signal controls another circuit\u003c\/li\u003e\n\u003cli\u003eA BC547 transistor operates as an electronic switch\u003c\/li\u003e\n\u003cli\u003eA 10K resistor limits transistor-base current\u003c\/li\u003e\n\u003cli\u003eA diode helps provide reverse-polarity protection\u003c\/li\u003e\n\u003cli\u003eOne control circuit can operate two LEDs\u003c\/li\u003e\n\u003cli\u003eAutomatic lighting can avoid unnecessary daytime operation\u003c\/li\u003e\n\u003cli\u003eA road model provides a recognisable application context\u003c\/li\u003e\n\u003cli\u003eInput, processing and output stages work together\u003c\/li\u003e\n\u003cli\u003eRepeatable testing supports scientific understanding\u003c\/li\u003e\n\u003cli\u003eTroubleshooting helps identify setup and electrical problems\u003c\/li\u003e\n\u003cli\u003eSensor-controlled systems can support smart-city learning\u003c\/li\u003e\n\u003cli\u003eObservation can be converted into a project explanation\u003c\/li\u003e\n\u003cli\u003eA working demonstration can support report and viva preparation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eBuilt for Confident Demonstration\u003c\/h1\u003e\n\u003cp\u003eThe visible automatic response, contextual road display and guided digital resources make the model suitable for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSchool science projects\u003c\/li\u003e\n\u003cli\u003eScience exhibitions\u003c\/li\u003e\n\u003cli\u003eClassroom demonstrations\u003c\/li\u003e\n\u003cli\u003eLDR-sensor presentations\u003c\/li\u003e\n\u003cli\u003eTransistor-switching activities\u003c\/li\u003e\n\u003cli\u003eAutomatic-lighting projects\u003c\/li\u003e\n\u003cli\u003eElectronic-circuit demonstrations\u003c\/li\u003e\n\u003cli\u003eEnergy-conservation presentations\u003c\/li\u003e\n\u003cli\u003eSmart-city infrastructure topics\u003c\/li\u003e\n\u003cli\u003eSustainable-development discussions\u003c\/li\u003e\n\u003cli\u003eSTEM learning\u003c\/li\u003e\n\u003cli\u003eExperiential learning\u003c\/li\u003e\n\u003cli\u003eProject-based learning\u003c\/li\u003e\n\u003cli\u003eProject-report preparation\u003c\/li\u003e\n\u003cli\u003eViva preparation\u003c\/li\u003e\n\u003cli\u003eOral presentations\u003c\/li\u003e\n\u003cli\u003eGrades 7–12\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eSuggested Student Explanation\u003c\/h1\u003e\n\u003cblockquote\u003e\n\u003cp\u003e“This is a Smart Street Light automatic-lighting model using an LDR sensor. The LDR responds to the amount of surrounding light. During brighter conditions, the sensor module keeps the BC547 transistor switched off, so both street lights remain off. When I cover the LDR to simulate darkness, the sensor output changes and activates the transistor through the 10K resistor. The transistor completes the LED circuit and both street lights switch on automatically. When light reaches the LDR again, the transistor switches off and both lights turn off. The model demonstrates light sensing, comparator control, transistor switching, reverse-polarity protection, automatic lighting and the energy-saving concept of switching lights only when required.”\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cp\u003eStudents should understand the process and present it naturally rather than memorising the explanation without understanding the system.\u003c\/p\u003e\n\u003ch1\u003eBuild Upon the Foundation\u003c\/h1\u003e\n\u003cp\u003eOnce students understand the original LDR-controlled lighting sequence, the model can inspire further questions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCould a manual override switch be added?\u003c\/li\u003e\n\u003cli\u003eCould an indicator display the sensor state?\u003c\/li\u003e\n\u003cli\u003eCould the brightness of the LEDs be controlled?\u003c\/li\u003e\n\u003cli\u003eCould additional model street lights be connected?\u003c\/li\u003e\n\u003cli\u003eCould a relay module be explored?\u003c\/li\u003e\n\u003cli\u003eCould a timer operate alongside the LDR?\u003c\/li\u003e\n\u003cli\u003eCould a microcontroller record switching events?\u003c\/li\u003e\n\u003cli\u003eCould a motion sensor be investigated?\u003c\/li\u003e\n\u003cli\u003eCould voltage and current be measured?\u003c\/li\u003e\n\u003cli\u003eCould the switching threshold be displayed numerically?\u003c\/li\u003e\n\u003cli\u003eCould the model form part of a larger smart-city display?\u003c\/li\u003e\n\u003cli\u003eCould separate model-lighting zones be represented?\u003c\/li\u003e\n\u003cli\u003eCould a different power source be explored?\u003c\/li\u003e\n\u003cli\u003eCould an automatic day-and-night counter be designed?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese are further learning directions.\u003c\/p\u003e\n\u003cp\u003eThey are not built-in functions of the supplied product.\u003c\/p\u003e\n\u003cp\u003eAdditional components, modifications and suitable guidance may be required.\u003c\/p\u003e\n\u003ch1\u003eThis Concept Can Also Be Used to Explore\u003c\/h1\u003e\n\u003cp\u003eThe model’s light-sensing and switching sequence can support classroom discussions around:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAutomatic garden-lighting concepts\u003c\/li\u003e\n\u003cli\u003eCorridor-lighting concepts\u003c\/li\u003e\n\u003cli\u003eLight-sensitive display systems\u003c\/li\u003e\n\u003cli\u003eAutomatic entrance-lighting concepts\u003c\/li\u003e\n\u003cli\u003eEnergy-conscious building controls\u003c\/li\u003e\n\u003cli\u003eSensor-controlled infrastructure\u003c\/li\u003e\n\u003cli\u003eSmart-city automation\u003c\/li\u003e\n\u003cli\u003eInput–process–output systems\u003c\/li\u003e\n\u003cli\u003eTransistor-controlled loads\u003c\/li\u003e\n\u003cli\u003eThreshold-based switching\u003c\/li\u003e\n\u003cli\u003eEnvironmental sensing\u003c\/li\u003e\n\u003cli\u003eReverse-polarity protection\u003c\/li\u003e\n\u003cli\u003eRoad-lighting concepts\u003c\/li\u003e\n\u003cli\u003eUrban energy-management concepts\u003c\/li\u003e\n\u003cli\u003eLight-responsive control systems\u003c\/li\u003e\n\u003cli\u003eAutomatic lighting for public spaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese are educational concept extensions based on the model’s working principle.\u003c\/p\u003e\n\u003cp\u003eThey are not additional built-in functions of the supplied product.\u003c\/p\u003e\n\u003ch1\u003eConcept and Sustainability Connections\u003c\/h1\u003e\n\u003cp\u003eThe model can support classroom discussion around:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAmbient-light sensing\u003c\/li\u003e\n\u003cli\u003eAutomatic control\u003c\/li\u003e\n\u003cli\u003eBasic electrical circuits\u003c\/li\u003e\n\u003cli\u003eTransistor switching\u003c\/li\u003e\n\u003cli\u003eEnergy conservation\u003c\/li\u003e\n\u003cli\u003eSmart infrastructure\u003c\/li\u003e\n\u003cli\u003eSustainable communities\u003c\/li\u003e\n\u003cli\u003eObservation and problem solving\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSDG 7 — Affordable and Clean Energy\u003c\/h2\u003e\n\u003cp\u003eThe model demonstrates the energy-saving concept of operating street lights only when required.\u003c\/p\u003e\n\u003cp\u003eIt does not calculate or certify an actual energy saving.\u003c\/p\u003e\n\u003ch2\u003eSDG 9 — Industry, Innovation and Infrastructure\u003c\/h2\u003e\n\u003cp\u003eThe model introduces selected sensor-based automation and intelligent-infrastructure concepts.\u003c\/p\u003e\n\u003ch2\u003eSDG 11 — Sustainable Cities and Communities\u003c\/h2\u003e\n\u003cp\u003eThe model helps students discuss how automatic street-lighting concepts may support safer and more energy-aware communities.\u003c\/p\u003e\n\u003cp\u003eReferences to SDGs 7, 9 and 11 are included only to indicate broad themes that may be discussed through the educational model.\u003c\/p\u003e\n\u003cp\u003eThey do not imply certification, endorsement, affiliation, approval or official alignment by:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe United Nations\u003c\/li\u003e\n\u003cli\u003eAny United Nations body\u003c\/li\u003e\n\u003cli\u003eNCERT\u003c\/li\u003e\n\u003cli\u003eCBSE\u003c\/li\u003e\n\u003cli\u003eNEP authorities\u003c\/li\u003e\n\u003cli\u003eAny school board\u003c\/li\u003e\n\u003cli\u003eAny educational institution\u003c\/li\u003e\n\u003cli\u003eAny public authority\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe model demonstrates selected educational concepts associated with automatic lighting, energy conservation, infrastructure and sustainable communities.\u003c\/p\u003e\n\u003cp\u003eIt does not claim to achieve, measure or certify any Sustainable Development Goal or environmental outcome.\u003c\/p\u003e\n\u003ch1\u003eReferences and Educational-Mapping Notice\u003c\/h1\u003e\n\u003col\u003e\n\u003cli\u003e\u003cstrong\u003eReferences to NEP 2020, NCERT\/CBSE, learning approaches and concept mapping are for illustrative, reference and educational-use purposes only. They indicate broad learning relevance and do not imply endorsement, affiliation, approval, certification or official alignment by NCERT, CBSE, any school board, educational institution or authority.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eConcept mapping and learning relevance may vary depending on assembly, demonstration setup, supervision, curriculum, grade level and classroom use.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eThe terms experiential learning, project-based learning, concept understanding, observation and problem solving describe the intended educational approach of the activity. They do not represent an official curriculum certification, prescribed learning outcome or institutional approval.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch1\u003eA Complete Learning Journey\u003c\/h1\u003e\n\u003cp\u003eScan the manual QR code.\u003cbr\u003eRead the digital instruction manual.\u003cbr\u003eOpen the separate video QR code.\u003cbr\u003eWatch the actual-product demonstration.\u003cbr\u003eIdentify the supplied components.\u003cbr\u003eFit the two street-light poles.\u003cbr\u003eCheck the electrical connections.\u003cbr\u003eConnect the 9V battery.\u003cbr\u003eObserve the daylight condition.\u003cbr\u003eCover the LDR.\u003cbr\u003eWatch both street lights illuminate.\u003cbr\u003eRestore the light.\u003cbr\u003eObserve the automatic reset.\u003cbr\u003eRepeat the activity.\u003cbr\u003eRecord the result.\u003cbr\u003eDisconnect the battery.\u003cbr\u003eExplain the system.\u003cbr\u003eBuild upon the idea.\u003c\/p\u003e\n\u003cp\u003eThe Go Science Smart Street Light transforms ambient-light sensing, comparator control, transistor switching, circuit protection and automatic public-lighting concepts into a guided working experience that students can observe, test, understand and confidently demonstrate.\u003c\/p\u003e\n\u003ch1\u003eImportant Educational and Usage Information\u003c\/h1\u003e\n\u003cp\u003eThis product is an educational demonstration model and science teaching aid intended for supervised school-project and classroom use.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdult or teacher supervision is recommended.\u003c\/li\u003e\n\u003cli\u003eUse one suitable 9V battery only.\u003c\/li\u003e\n\u003cli\u003eBattery is not included.\u003c\/li\u003e\n\u003cli\u003eCheck battery polarity before connection.\u003c\/li\u003e\n\u003cli\u003eDo not intentionally connect the battery in reverse.\u003c\/li\u003e\n\u003cli\u003eDo not short-circuit the battery connector.\u003c\/li\u003e\n\u003cli\u003eDo not connect an unsuitable power source.\u003c\/li\u003e\n\u003cli\u003ePlace the model on a flat, stable and dry surface.\u003c\/li\u003e\n\u003cli\u003eKeep all electronic components away from water and moisture.\u003c\/li\u003e\n\u003cli\u003eDo not pull or sharply bend the jumper wires.\u003c\/li\u003e\n\u003cli\u003eDo not force or overtighten the street-light poles.\u003c\/li\u003e\n\u003cli\u003eCover the LDR gently without pressing the sensor module.\u003c\/li\u003e\n\u003cli\u003eAdjust the potentiometer carefully and under supervision.\u003c\/li\u003e\n\u003cli\u003eKeep each demonstration reasonably brief.\u003c\/li\u003e\n\u003cli\u003eDisconnect the battery immediately after every demonstration.\u003c\/li\u003e\n\u003cli\u003eNever store the model with the battery connected.\u003c\/li\u003e\n\u003cli\u003eSecure the detachable poles and toy car during transport.\u003c\/li\u003e\n\u003cli\u003eStore the model in a cool and dry location.\u003c\/li\u003e\n\u003cli\u003eStop using the model if the battery becomes hot, damaged or begins leaking.\u003c\/li\u003e\n\u003cli\u003eInternet access is required for the online manual and demonstration video.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eTroubleshooting Guide\u003c\/h1\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\"\u003eProblem\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003ePossible reason\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eSuggested check\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoth LEDs remain off when the LDR is covered\u003c\/td\u003e\n\u003ctd\u003eThe 9V battery may be weak or discharged\u003c\/td\u003e\n\u003ctd\u003eReplace it with a fresh 9V battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoth LEDs remain off when the LDR is covered\u003c\/td\u003e\n\u003ctd\u003eA jumper-wire connection may be loose\u003c\/td\u003e\n\u003ctd\u003eCheck the VCC, GND and DO connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoth LEDs remain off when the LDR is covered\u003c\/td\u003e\n\u003ctd\u003eThe sensor threshold may require adjustment\u003c\/td\u003e\n\u003ctd\u003eCarefully adjust the potentiometer under adult or teacher supervision\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoth LEDs remain on under normal ambient light\u003c\/td\u003e\n\u003ctd\u003eThe surrounding area may be too dark\u003c\/td\u003e\n\u003ctd\u003eMove the model towards a brighter indoor location\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoth LEDs remain on under normal ambient light\u003c\/td\u003e\n\u003ctd\u003eThe sensitivity threshold may be unsuitable\u003c\/td\u003e\n\u003ctd\u003eMake a small potentiometer adjustment and repeat the test\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLED brightness appears low\u003c\/td\u003e\n\u003ctd\u003eBattery power may be low\u003c\/td\u003e\n\u003ctd\u003eReplace it with a fresh 9V battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThe switching response is inconsistent\u003c\/td\u003e\n\u003ctd\u003eThe LDR may be partly shaded\u003c\/td\u003e\n\u003ctd\u003eAllow clear ambient light to reach the sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThe switching response is inconsistent\u003c\/td\u003e\n\u003ctd\u003eA connection may be loose\u003c\/td\u003e\n\u003ctd\u003eDisconnect the battery and inspect the jumper wires\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOnly one LED illuminates\u003c\/td\u003e\n\u003ctd\u003eA pole or LED connection may be loose\u003c\/td\u003e\n\u003ctd\u003eDisconnect the battery and inspect the visible connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eA street-light pole feels loose\u003c\/td\u003e\n\u003ctd\u003eThe pole may not be seated correctly\u003c\/td\u003e\n\u003ctd\u003eGently refit it onto the pre-installed anchor screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThe model does not respond after battery connection\u003c\/td\u003e\n\u003ctd\u003eThe battery may be connected incorrectly\u003c\/td\u003e\n\u003ctd\u003eDisconnect it, verify the polarity and reconnect it correctly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching occurs too easily\u003c\/td\u003e\n\u003ctd\u003eThe sensor threshold may require adjustment\u003c\/td\u003e\n\u003ctd\u003eMake a very small potentiometer adjustment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching is delayed or unreliable\u003c\/td\u003e\n\u003ctd\u003eBattery strength or ambient lighting may be unsuitable\u003c\/td\u003e\n\u003ctd\u003eUse a fresh battery and test under clearer light conditions\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\u003eDo not dismantle, cut, modify or resolder the circuit during normal educational use.\u003c\/p\u003e\n\u003ch1\u003eProduct Appearance and Assembly Note\u003c\/h1\u003e\n\u003cp\u003eEach \u003cstrong\u003eGo Science Classroom Series Smart Street Light\u003c\/strong\u003e model is carefully assembled in small batches.\u003c\/p\u003e\n\u003cp\u003eThe model is handcrafted for school-project and demonstration use.\u003c\/p\u003e\n\u003cp\u003eBecause the model uses sourced electronic components and manually assembled structural elements, the supplied product may show minor variations in:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBase-sheet shade or finish\u003c\/li\u003e\n\u003cli\u003eRoad-print position\u003c\/li\u003e\n\u003cli\u003eToy-car colour, markings or design\u003c\/li\u003e\n\u003cli\u003eStreet-light pole colour or finish\u003c\/li\u003e\n\u003cli\u003eLED-holder appearance\u003c\/li\u003e\n\u003cli\u003eWooden mounting-block shade or dimensions\u003c\/li\u003e\n\u003cli\u003eWire colours\u003c\/li\u003e\n\u003cli\u003eWire lengths and routing\u003c\/li\u003e\n\u003cli\u003eJumper-wire colours\u003c\/li\u003e\n\u003cli\u003eLDR-module appearance\u003c\/li\u003e\n\u003cli\u003eCircuit-board appearance\u003c\/li\u003e\n\u003cli\u003eComponent position\u003c\/li\u003e\n\u003cli\u003eScrew appearance\u003c\/li\u003e\n\u003cli\u003eBattery-connector style\u003c\/li\u003e\n\u003cli\u003eComponent brand or production batch\u003c\/li\u003e\n\u003cli\u003eSmall assembly and positioning details\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese minor variations do not change the model’s core educational concept or fundamental operating sequence:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLight Present → Street Lights OFF → Darkness Detected → Street Lights ON → Light Restored → Street Lights OFF\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImages\/creative illustration are for reference. Actual product may vary due to manufacturing, components availability \u0026amp; assembly update.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eApproximate dimensions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLength: 16 cm\u003c\/li\u003e\n\u003cli\u003eWidth: 11 cm\u003c\/li\u003e\n\u003cli\u003eHeight with the street-light poles fitted: 15 cm\u003c\/li\u003e\n\u003cli\u003eHeight without the street-light poles fitted: 3 cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eEducational Use Only and Important Product Limitation\u003c\/h1\u003e\n\u003cp\u003eThis product is an \u003cstrong\u003eeducational demonstration model and science teaching aid\u003c\/strong\u003e for supervised school-project and classroom use.\u003c\/p\u003e\n\u003cp\u003eIt is:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot intended as a children’s play toy\u003c\/li\u003e\n\u003cli\u003eNot an electrical appliance\u003c\/li\u003e\n\u003cli\u003eNot a substitute for a real public-lighting system\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe model demonstrates selected concepts related to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLight sensing\u003c\/li\u003e\n\u003cli\u003eBasic electrical circuits\u003c\/li\u003e\n\u003cli\u003eComparator-based control\u003c\/li\u003e\n\u003cli\u003eTransistor switching\u003c\/li\u003e\n\u003cli\u003eAutomation\u003c\/li\u003e\n\u003cli\u003eReverse-polarity protection\u003c\/li\u003e\n\u003cli\u003eEnergy conservation\u003c\/li\u003e\n\u003cli\u003eSmart-city infrastructure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt does not reproduce the complete construction, voltage, capacity, protection, installation or performance of an actual municipal street-lighting system.\u003c\/p\u003e\n\u003cp\u003eIt does not provide:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA calibrated measurement of light intensity\u003c\/li\u003e\n\u003cli\u003eA numerical lux reading\u003c\/li\u003e\n\u003cli\u003eA measurement of actual electricity consumption\u003c\/li\u003e\n\u003cli\u003eA guaranteed electricity-saving result\u003c\/li\u003e\n\u003cli\u003eA commercial public-lighting function\u003c\/li\u003e\n\u003cli\u003eAn outdoor weatherproof lighting function\u003c\/li\u003e\n\u003cli\u003eA motion-sensing function\u003c\/li\u003e\n\u003cli\u003eA solar-powered lighting function\u003c\/li\u003e\n\u003cli\u003eAn IoT or remote-monitoring function\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAny further applications discussed in the description are educational concept extensions and not additional built-in functions of the supplied model.\u003c\/p\u003e\n\u003cp\u003eReturn, Refund \u0026amp; Exchange Notice\u003c\/p\u003e\n\u003cp\u003eThis educational working model contains tested and sensitive electronic components. Kits that have been opened, powered, activated, tested, used, altered, exposed to moisture, connected to an unsuitable power source, short-circuited or operated under unsuitable 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, product photographs, demonstration video and operating instructions carefully before purchase.\u003c\/p\u003e","brand":"Go Science","offers":[{"title":"Default Title","offer_id":45697653407791,"sku":"2671814292806","price":649.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/4442\/3471\/files\/Smart_Street_light_school_project_kit_go_science_classroom_series_retail_box_packing_with_kit.jpg?v=1785326713","url":"https:\/\/goscience.in\/products\/smart-street-light-school-project","provider":"Go Science","version":"1.0","type":"link"}