GO Science Smart Street Light educational concept kit in its retail packaging, with three assembled model kits displayed below. The kit demonstrates a day-and-night automatic light control system with a blue car, street lamp, and road.
Video of Smart Street light school project kit go science classroom series
A Smart Street Light school project  DIY electronic car race control kit featuring a blue toy car on a road base, a breadboard circuit board, a microcontroller, and two green LED street light sensors on silver poles.
GO Science Classroom Series Smart Street Light Automatic Street Light (LDR Sensor) School Project & Demonstration Kit box, shown against a plain white background.
Smart Street Light school project  bu Go Science.A small electronic toy car setup on a road base with two green-lit pole lights, a blue toy car, and a central circuit board with wires, photographed on a plain white background.
The back of the retail packaging box for the GO Science Classroom Series Smart Street Light educational model kit, featuring product specifications, features, and an illustration of the model setup.
Smart Street Light school project go science classroom series product image model 3. A small electronic circuit board setup on a wooden base with a blue circular base, white pole, yellow platform, and black-and-yellow striping, photographed against a white background.
Smart Street Light school project go science classroom series product image model 4. A miniature toy traffic light and car assembly on a white background. The model features a gray plastic pole with a green traffic light, a blue toy car on a road, and various wiring and base details.
Go Science Classroom Series Smart Street Light educational concept model kit packaging. The box features a dark blue background with yellow and white text, icons detailing features like LDR sensor detection, automatic light control, and energy saving concepts, and a photo of three students experimenting with the light control circuit on a desk at night.
GO Science Smart Street Light Classroom Concept Model Kit in its retail packaging, showing a 7-12 grade educational product box with feature icons and a demonstration photo of children.
GO Science Smart Street Light Classroom Concept Model Kit inside box go science classroom series. A toy car racing circuit board kit featuring a green plastic toy car, a printed race track, a breadboard, a potentiometer, and various connecting wires on a beige circuit board base.
Two small desk-style lamps with green plastic heads, twisted metal stems, and round bases in blue and teal, shown on a white background with a small wooden block supporting one base.
An electronic circuit board kit mounted on a printed wooden road base with yellow and black markings, featuring multicolored wires and small electronic components, isolated on a white background.
GO Science Smart Street Light educational concept kit in its retail packaging, with three assembled model kits displayed below. The kit demonstrates a day-and-night automatic light control system with a blue car, street lamp, and road.
Video of Smart Street light school project kit go science classroom series
A Smart Street Light school project  DIY electronic car race control kit featuring a blue toy car on a road base, a breadboard circuit board, a microcontroller, and two green LED street light sensors on silver poles.
GO Science Classroom Series Smart Street Light Automatic Street Light (LDR Sensor) School Project & Demonstration Kit box, shown against a plain white background.
Smart Street Light school project  bu Go Science.A small electronic toy car setup on a road base with two green-lit pole lights, a blue toy car, and a central circuit board with wires, photographed on a plain white background.
The back of the retail packaging box for the GO Science Classroom Series Smart Street Light educational model kit, featuring product specifications, features, and an illustration of the model setup.
Smart Street Light school project go science classroom series product image model 3. A small electronic circuit board setup on a wooden base with a blue circular base, white pole, yellow platform, and black-and-yellow striping, photographed against a white background.
Smart Street Light school project go science classroom series product image model 4. A miniature toy traffic light and car assembly on a white background. The model features a gray plastic pole with a green traffic light, a blue toy car on a road, and various wiring and base details.
Go Science Classroom Series Smart Street Light educational concept model kit packaging. The box features a dark blue background with yellow and white text, icons detailing features like LDR sensor detection, automatic light control, and energy saving concepts, and a photo of three students experimenting with the light control circuit on a desk at night.
GO Science Smart Street Light Classroom Concept Model Kit in its retail packaging, showing a 7-12 grade educational product box with feature icons and a demonstration photo of children.
GO Science Smart Street Light Classroom Concept Model Kit inside box go science classroom series. A toy car racing circuit board kit featuring a green plastic toy car, a printed race track, a breadboard, a potentiometer, and various connecting wires on a beige circuit board base.
Two small desk-style lamps with green plastic heads, twisted metal stems, and round bases in blue and teal, shown on a white background with a small wooden block supporting one base.
An electronic circuit board kit mounted on a printed wooden road base with yellow and black markings, featuring multicolored wires and small electronic components, isolated on a white background.
Vendor: Vendor: Go Science

Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series

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GO Science Smart Street Light educational concept kit in its retail packaging, with three assembled model kits displayed below. The kit demonstrates a day-and-night automatic light control system with a blue car, street lamp, and road.

Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series

Rs. 649.00
Description

Smart Street Light School Project Automatic Street Light (LDR Sensor) - Go Science Classroom Series — Educational Concept Model Kit

School Project & Demonstration Model

Pre-Wired Automatic Lighting & Smart-City Learning Kit

Detect the light. Simulate darkness. Watch both street lights respond automatically.

Turn ambient-light sensing, electronic control, transistor switching and the energy-saving concept of automatic public lighting into one connected learning experience.

The Go Science Classroom Series Smart Street Light — Automatic Street Light (LDR Sensor) is a pre-wired educational working model that demonstrates how street lights can respond automatically to changes in surrounding light.

The 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.

Under Sufficient Ambient Light

The LDR responds to the brighter condition. The BC547 transistor remains switched off and both model street lights remain off.

When Darkness Is Simulated

Covering the LDR changes the sensor-module output. The BC547 transistor switches on and both LED street lights illuminate automatically.

When Light Returns

The sensor responds to the brighter condition again. The transistor switches off and both street lights turn off automatically.

Students can observe the complete sequence:

Detect the Light → Compare the Condition → Switch the Circuit → Illuminate Both Street Lights → Restore the Light → Reset Automatically

The four-stage operating journey can also be explained as:

Daylight Detected by LDR → Transistor Remains OFF → Darkness Detected by LDR → LED Street Lights Turn ON

The 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.

Suggested for Grades 7–12, 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.

One Sensor. Two Street Lights. One Automatic System.

Explore light sensing, electronic control and automatic lighting together

The model allows students to observe several connected scientific and electronic processes operating within one recognisable road-lighting environment.

Ambient-Light Detection

The LDR responds to the amount of surrounding light reaching its photosensitive surface.

Signal Comparison

The sensor module evaluates the detected light condition against its configured sensitivity threshold.

Transistor Switching

The module’s digital-output signal controls a BC547 NPN transistor through a 10K resistor.

Dual Street-Light Response

The transistor switches the electrical path controlling the two white LED street lights.

Together, these stages create a clear functional journey:

Ambient Light → LDR Sensor → Comparator Output → BC547 Transistor → Dual LED Street Lights

The model brings the input, control and output stages together so students can see how a complete automatic system responds to changing environmental conditions.

Smart Features

Automatic Light Control

The LDR sensor responds to surrounding light and controls the model street lights automatically through the connected electronic circuit.

Energy-Saving Concept

The model demonstrates the energy-saving idea of keeping the street lights off under sufficient light and switching them on when darkness is detected.

It does not measure or guarantee any specific electricity saving.

Transistor Switching

The BC547 transistor operates as an electronic switch and controls the street lights according to the signal received from the sensor module.

Reverse-Polarity Protection

The 1N4007 diode helps protect the circuit from reverse current if the battery is accidentally connected with incorrect polarity.

This is an additional protective feature and does not mean that reverse battery connection should be tested intentionally.

Real-World Application

The model helps explain selected concepts associated with automatic public lighting, sensor-based infrastructure and smart-city learning.

It is a simplified educational representation and not a substitute for an actual public-lighting system.

What’s in the Pre-Wired Kit?

  • Base sheet with road-layout graphic
  • Small toy car representing road traffic
  • Two street-light poles
  • Two pre-soldered white LED street lights
  • Two pre-installed bottom-to-top anchor screws
  • Wooden electronics-mounting block
  • General-purpose circuit board
  • BC547 NPN transistor
  • 10K resistor
  • 1N4007 reverse-polarity protection diode
  • LDR light-sensor module
  • Onboard sensitivity-adjustment potentiometer
  • Three jumper wires
  • VCC, GND and digital-output connections
  • 9V battery snap connector
  • Pre-connected electrical wiring
  • Pre-wired educational working model
  • Dedicated QR access to the digital instruction manual
  • Separate dedicated QR access to the working demonstration video
  • Detailed full-colour digital learning guide
  • Step-by-step actual-product demonstration video
  • Illustrated component explanations
  • Street-light pole attachment guidance
  • Battery-connection instructions
  • LDR light-and-darkness testing guidance
  • Automatic light-control explanation
  • BC547 transistor-switching explanation
  • 10K resistor explanation
  • Reverse-polarity protection explanation
  • Testing and troubleshooting support
  • Safety, care and storage guidance
  • Learning recap and project-support material

The manual and demonstration video are accessed through separate dedicated QR codes, allowing students to open each resource independently.

Required Separately

One Fresh 9V Battery

The model requires one standard 9V battery.

Battery is not included.

Use a fresh battery for reliable demonstration performance.

For repeated classroom activities or science exhibitions, keeping a spare fresh battery available is recommended.

Disconnect the battery immediately after completing each demonstration.

Never store the model with the battery connected.

Product Specifications

Specification Details
Product name Smart Street Light
Model description Automatic Street Light (LDR Sensor)
Series Go Science Classroom Series
Product classification Educational Concept Model Kit
Project classification School Project & Demonstration Model
Recommended grades Grades 7–12
Primary demonstration Automatic street-light control according to ambient light
Environmental input Ambient light and simulated darkness
Primary sensor LDR light-sensor module
Sensor type CdS light-dependent photoresistor with comparator circuit
Sensitivity control Onboard adjustable potentiometer
Sensor connections VCC, GND and DO
Electronic switch BC547 NPN transistor
BC547 reference NPN transistor; maximum collector current approximately 100 mA; VCEO approximately 45 V
Base resistor 10K, ¼-watt resistor
Protection component 1N4007 reverse-polarity protection diode
1N4007 reference Rectifier diode; approximately 1 A rating and 1000 V peak inverse voltage
Lighting output Two pre-soldered white LED street lights
LED type Two pre-soldered 5 mm white LEDs
Number of street-light poles Two
Pole installation Fitted onto two pre-installed anchor screws
Power requirement One 9V battery
Battery included No
Electrical preparation Pre-wired
Contextual display Road-layout base with toy car
Digital manual Included through a dedicated manual QR code
Demonstration video Dedicated video QR, this product page, Go Science website and official Go Science YouTube channel
Approximate length 16 cm
Approximate width 11 cm
Approximate assembled height 15 cm
Approximate height without poles 3 cm
Designed and assembled Designed & Assembled in India
Intended use Supervised educational demonstration

Product dimensions are approximate.

Product colours, toy-car design, wire routing, pole finish, component placement and minor assembly details may vary according to manufacturing, component availability and assembly updates.

A Complete Guided Learning Experience

Working model, digital manual and video demonstration—all connected

Every 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.

This kit provides access to:

  • A detailed full-colour digital instruction manual
  • Illustrated product and component explanations
  • Complete kit-contents guidance
  • Street-light pole attachment instructions
  • Battery-connection guidance
  • LDR light-sensing explanations
  • Comparator and sensitivity-control guidance
  • BC547 transistor-switching explanation
  • 10K resistor explanation
  • 1N4007 protection-diode explanation
  • Automatic daylight-and-darkness operating sequence
  • Step-by-step demonstration instructions
  • Troubleshooting support
  • Safety, care and storage guidance
  • A dedicated actual-product working video
  • Independent QR access to the digital manual
  • Independent QR access to the demonstration video
  • Product-page and product-gallery video access
  • Go Science website video access
  • Official Go Science YouTube video access
  • Learning recap and project-support material

The guided learning journey takes students through:

Explore → Understand → Watch → Prepare → Connect → Test → Observe → Explain → Complete

Students 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.

Detailed Full-Colour Digital Instruction Manual Included

Scan, understand and revisit whenever needed

A dedicated QR code supplied with the kit provides access to the product-specific Smart Street Light digital instruction manual.

The manual QR code is independent of the demonstration-video QR code.

The digital manual can be opened on a compatible phone, tablet or computer and used during:

  • Initial project preparation
  • Product identification
  • Component identification
  • Street-light pole attachment
  • Battery connection
  • Demonstration setup
  • LDR sensor understanding
  • Automatic-switching explanation
  • Classroom learning
  • Science-exhibition practice
  • Project-report preparation
  • Viva preparation
  • Troubleshooting
  • Safety and storage
  • Revision and concept recap

The manual explains:

  • The complete model layout
  • The supplied components
  • The LDR light-sensing principle
  • The comparator-based control stage
  • BC547 transistor switching
  • The role of the 10K resistor
  • Reverse-polarity protection
  • Correct pole fitting
  • Correct battery connection
  • Daylight and darkness testing
  • Automatic dual-light response
  • Troubleshooting
  • Safe shutdown
  • Storage guidance
  • Educational concepts
  • Learning recap

Internet access and a compatible QR-scanning device are required to open the digital manual.

Step-by-Step Video Demonstration Included

Watch the actual model before conducting the activity

A separate dedicated QR code supplied with the kit provides access to the Smart Street Light working demonstration video.

The video QR code is independent of the digital-manual QR code.

The actual-product video helps students, parents and teachers understand:

  • The complete Smart Street Light model
  • The road-layout base and toy car
  • The two detachable street-light poles
  • The pre-installed pole-mounting screws
  • Correct attachment of the poles
  • The LDR sensor module
  • The circuit board and transistor circuit
  • The jumper-wire connections
  • Correct 9V battery connection
  • The normal ambient-light condition
  • How darkness is simulated by covering the LDR
  • Both LED street lights switching on
  • Both LED street lights switching off when light returns
  • Correct battery disconnection after demonstration

The video can be accessed in three convenient ways:

This Product Page and Product Gallery

The working video is available alongside the product photographs and information on this Go Science product page.

Parents, teachers and students can view the actual model before purchase and revisit the demonstration whenever required.

Official Go Science YouTube Channel

The complete working demonstration is also available through the official Go Science YouTube channel for convenient viewing, revision and sharing.

Dedicated Video QR Code

A separate video QR code supplied with the kit provides direct access to the demonstration whenever students need to revisit the setup or operating sequence.

This creates a continuous guided experience:

View → Scan → Watch → Prepare → Connect → Demonstrate → Rewatch

Internet access and a compatible QR-scanning device are required to open the online video.

Pre-Wired for Direct Exploration

Begin with a prepared working foundation

The 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.

The two street-light poles are fitted onto the prepared anchor screws before demonstration.

This working foundation allows students to move directly into meaningful exploration:

  • Identify the LDR sensor
  • Examine the electronic control board
  • Understand the comparator output
  • Identify the transistor-switching stage
  • Fit the two street-light poles
  • Connect the required 9V battery
  • Observe the daylight condition
  • Simulate darkness
  • Watch both LEDs illuminate
  • Restore the light and observe the reset
  • Run repeated demonstrations
  • Compare different light conditions
  • Record and compare observations
  • Adjust the sensor threshold under supervision
  • Understand the role of each component
  • Explain the automatic system confidently
  • Develop further automation ideas

The model is designed to be:

Observed → Tested → Retested → Understood → Explained → Built Upon

Pre-wired does not mean passive.

It provides a prepared working foundation from which investigation, observation, explanation and further learning can begin.


Watch the Complete System Respond

1. Prepare the Model

Place the model on a clean, flat, stable and dry surface.

Check that:

  • The electronic components are secure
  • The jumper wires are connected
  • The battery is not yet attached
  • The LDR surface is unobstructed
  • Both street-light poles are ready for fitting

2. Fit the Street-Light Poles

Locate the two anchor screws pre-installed in the base.

Align the hollow bottom of each street-light pole with its corresponding mounting screw.

Gently insert and rotate each pole until it stands upright and securely fitted.

Do not force or overtighten the poles.

3. Check the Connections

Verify that the three jumper wires remain securely connected:

  • VCC
  • GND
  • DO

Do not pull, stretch or sharply bend the wires.

4. Connect the Power

Attach one fresh 9V battery to the supplied snap connector using the correct terminal orientation.

5. Observe the Daylight Condition

Allow sufficient ambient room light to reach the LDR.

Both LED street lights should remain switched off.

6. Simulate Darkness

Cover the LDR completely using your hand or a suitable opaque cover.

Do not press hard on the sensor module.

7. Watch Both Street Lights Illuminate

When darkness is detected:

  • The sensor condition changes
  • The comparator output changes
  • The signal reaches the transistor circuit
  • The BC547 transistor switches on
  • The LED circuit is completed
  • Both street lights illuminate automatically

8. Restore the Light

Remove the cover and allow ambient light to reach the LDR again.

The control condition resets and both LEDs switch off automatically.

9. Repeat the Demonstration

Repeat the covering and uncovering sequence and compare the response.

10. Reset the Model

Disconnect the 9V battery immediately after completing the demonstration.

The complete sequence is:

Light Present → Street Lights OFF → Darkness Detected → Street Lights ON → Light Restored → Street Lights OFF

Explore the Automatic Light-Sensing System

See how surrounding light controls an electrical output

LDR stands for Light Dependent Resistor.

An LDR changes its electrical resistance according to the amount of light reaching its photosensitive surface.

Daylight or Brighter Condition

When sufficient light reaches the LDR:

  • The LDR responds to the brighter condition.
  • The sensor module maintains the daylight-state output.
  • The BC547 transistor remains switched off.
  • Both LED street lights remain off.

Darkness or Low-Light Condition

When the LDR is covered:

  • The amount of light reaching the sensor reduces.
  • The electrical condition of the LDR changes.
  • The comparator changes its digital output.
  • The transistor receives the switching signal.
  • Both LED street lights turn on automatically.

Students can explore:

  • Ambient-light detection
  • Light-dependent resistance
  • Daylight and darkness
  • Environmental sensing
  • Comparator outputs
  • Switching thresholds
  • Automatic control
  • Input and output devices
  • Cause-and-effect relationships
  • The energy-saving concept of automatic public lighting

The model detects changes in surrounding light.

It does not provide a calibrated numerical measurement of light intensity.

Follow the Automatic Lighting Journey

See the complete sensor-to-light pathway

The physical and electronic layout allows students to identify every stage of the automatic system.

Environmental Input

Ambient light or simulated darkness reaches the LDR.

Detection

The light-dependent resistor responds to the surrounding light condition.

Comparison

The comparator evaluates the detected condition against the configured sensitivity threshold.

Control Signal

The sensor module produces a digital-output signal.

Electronic Switching

The BC547 transistor responds to the control signal through the 10K resistor.

Lighting Output

The two LED street lights switch on or off.

Students can identify the essential automatic-control stages:

Light Condition → LDR → Comparator → Digital Output → BC547 Transistor → Dual LEDs

The model helps students connect sensor electronics with a visible public-lighting application rather than viewing the circuit only as an abstract diagram.

Understand the Comparator and Sensitivity Control

Decide when the lighting response should occur

The LDR module includes comparator electronics and an adjustable potentiometer.

The comparator evaluates the changing electrical condition of the LDR and determines when the digital output should switch.

The potentiometer allows the switching threshold to be adjusted.

Students can observe that the transition point may depend on:

  • Ambient room brightness
  • Distance from a light source
  • Direction of the light
  • Amount of sensor coverage
  • LDR orientation
  • Potentiometer setting
  • Battery condition

Sensitivity adjustment should be performed carefully using a suitable small screwdriver and preferably under adult or teacher supervision.

A small adjustment may change when the street lights switch on or off.

Explore BC547 Transistor Switching

Use a control signal to operate two LEDs

The BC547 NPN transistor functions as an electronic switch.

The LDR module detects the surrounding light condition, while the transistor controls the electrical path supplying the two street-light LEDs.

Transistor OFF

Under sufficient ambient light:

  • The sensor module maintains the daylight-state output.
  • The transistor remains in its non-conducting state.
  • Both LED street lights remain off.

Transistor ON

When darkness is detected:

  • The module’s digital output changes.
  • The signal reaches the transistor through the 10K resistor.
  • The transistor enters its conducting state.
  • The LED circuit is completed.
  • Both street lights illuminate automatically.

This demonstrates an important automatic-control structure:

Sensor → Control Signal → Electronic Switch → Output

Why the 10K Resistor Matters

Control the transistor’s base current

The 10K resistor is positioned within the transistor-control path.

It helps limit the current reaching the transistor’s base terminal.

This supports controlled transistor operation and helps avoid excessive base current.

Students can use this component to discuss:

  • Electrical resistance
  • Current limiting
  • Transistor biasing
  • Electronic switching
  • Circuit control
  • Component selection

The resistor is an essential part of the working circuit and should not be removed or bypassed.


Reverse-Polarity Protection

Additional protection for the pre-wired circuit

The circuit includes a 1N4007 diode within the power path.

The diode helps block reverse current if the 9V battery is accidentally connected with incorrect polarity.

This helps reduce the possibility of reverse current reaching the sensor and transistor circuit.

The protection feature does not mean the battery should intentionally be connected in reverse.

Always:

  • Check the battery terminals before connection
  • Connect the battery using the correct orientation
  • Disconnect it immediately if the model behaves unusually
  • Never intentionally test a reverse battery connection
  • Never short-circuit the battery snap terminals

Understand the Complete Functional System

System stage Component Function
Environmental input Ambient light or simulated darkness Provides the changing external condition
Detection LDR photoresistor Responds to the surrounding light
Comparison Sensor-module comparator Evaluates the detected condition
Threshold adjustment Potentiometer Adjusts the switching point
Control output DO connection Communicates the sensor state
Current control 10K resistor Limits transistor-base current
Electronic switch BC547 NPN transistor Activates or deactivates the LED circuit
Circuit protection 1N4007 diode Helps block reverse-polarity current
Lighting output Two LED street lights Represent automatic public lighting
Power source 9V battery Supplies electrical energy
Application context Road-layout base and toy car Represents a street environment
Learning support Digital manual and video Supports preparation, operation and explanation

A Smart-City Context Students Can Understand

Connect environmental sensing with public infrastructure

The road, toy vehicle and two street-light poles provide a recognisable application context.

Each element represents part of the complete system:

  • The road represents a public street.
  • The toy car represents road traffic.
  • The LDR represents environmental sensing.
  • The comparator evaluates the light condition.
  • The BC547 transistor performs electronic switching.
  • The two LEDs represent street lighting.
  • The battery powers the educational model.
  • The automatic response represents a smart-city lighting concept.

The model helps students explain:

  • Why street lights are not required during bright daylight
  • How automatic control may avoid unnecessary daytime lighting
  • How sensors respond to environmental conditions
  • How transistors control electrical outputs
  • Why public roads require lighting after dark
  • How automated systems may support smart-city infrastructure
  • How environmental inputs can control electronic systems

The model is a simplified educational representation.

Real public-lighting systems may use different power sources, controllers, timers, relays, sensors, protective housings, communication systems and professional installation.

Test. Observe. Discover.

Light-and-Darkness Test

Begin with the LDR fully exposed to normal ambient light.

Cover the sensor and observe both LEDs.

Remove the cover and observe the reset.

Test condition Sensor condition Expected street-light response
Before testing LDR exposed to sufficient light Both LEDs remain off
LDR covered Darkness simulated Both LEDs switch on
LDR partly covered Reduced light Response depends on the threshold
Cover removed Light restored Both LEDs switch off

Partial-Cover Test

Cover only part of the LDR.

Observe whether the street lights switch on.

Gradually increase the covered area and record the response.

Students can investigate how the result depends on:

  • Available ambient light
  • Amount of sensor coverage
  • Sensor direction
  • Configured threshold
  • Distance from a light source

Light-Distance Test

Place the model at different distances from an indoor light source.

Students can record:

  • Distance from the light
  • Whether the LEDs remained on or off
  • Whether the response changed
  • Whether the LDR faced the light directly
  • Whether surrounding shadows affected the result

Sensor-Direction Test

Turn the model so the LDR faces different directions.

Observe how its orientation affects the detected light condition.

Sensitivity Test

Under adult or teacher supervision, make a very small adjustment to the potentiometer.

Repeat the light-and-darkness test and compare the switching point.

Avoid forceful or unnecessary adjustment.

Repeatability Test

Repeat the same cover-and-uncover sequence several times.

Compare:

  • Response speed
  • LED brightness
  • Whether both LEDs switch together
  • Whether the result remains consistent
  • Whether battery strength affects operation

Battery-Condition Observation

Compare the model’s response using a fresh battery and a battery that has already been used for several demonstrations.

A weak battery may result in:

  • Dimmer LEDs
  • Inconsistent switching
  • Delayed response
  • Reduced demonstration reliability

Do not use a damaged, leaking or unsuitable battery.

Reset Test

Observe how quickly the LEDs turn off when ambient light reaches the LDR again.

If they remain on, check:

  • Ambient-light level
  • Sensor orientation
  • Sensitivity setting
  • Battery condition
  • Jumper-wire connections

Learn Through Every Demonstration

Watch

Review the actual-product demonstration video before beginning.

Predict

What will happen when the LDR is covered?

Prepare

Fit the street-light poles and inspect the electrical connections.

Connect

Attach a fresh 9V battery using the correct polarity.

Test

Expose and cover the LDR.

Observe

Watch both LED street lights respond.

Record

Document the light condition and corresponding LED state.

Compare

Repeat the activity under different lighting conditions.

Analyse

Explain how the LDR, comparator and transistor work together.

Troubleshoot

Check the battery, sensor, jumper wires, sensitivity setting and pole connections.

Explain

Describe the complete automatic-lighting sequence.

Extend

Develop further questions about sensors, automation and energy conservation.

Explore Key Concepts

Light Sensing

  • Ambient-light detection
  • LDR photoresistors
  • Daylight and darkness
  • Sensor orientation
  • Sensitivity thresholds
  • Environmental inputs

Electrical Circuits

  • Battery-powered circuits
  • Current flow
  • Resistors
  • LEDs
  • Circuit paths
  • Battery polarity
  • Protective diodes

Electronic Switching

  • BC547 NPN transistor
  • Non-conducting state
  • Conducting state
  • Base-current control
  • Digital sensor output
  • Automatic control

Automation and Control

  • Environmental input
  • Sensor detection
  • Signal comparison
  • Electronic switching
  • Visible output
  • Automatic reset

Smart-City Learning

  • Automatic public lighting
  • Energy-saving concepts
  • Intelligent infrastructure
  • Public-road lighting
  • Sensor-controlled systems

Practical Investigation

  • Controlled testing
  • Observation tables
  • Threshold comparison
  • Sensor orientation
  • Battery comparison
  • Repeatability
  • Troubleshooting

Learning Approach and Concept Mapping

The Smart Street Light model is designed to support supervised, activity-based learning through:

  • Experiential learning
  • Project-based learning
  • Concept understanding
  • Observation
  • Comparison
  • Problem solving
  • Practical demonstration
  • Student explanation
  • Project-report preparation
  • Viva and presentation practice

The model is designed around selected concepts relevant to Grades 7–12, including:

  • Ambient-light sensing
  • Light-dependent resistance
  • Basic electrical circuits
  • Input and output devices
  • Comparator-based control
  • Transistor switching
  • Current-limiting resistors
  • Reverse-polarity protection
  • Automatic lighting
  • Energy-conservation concepts
  • Automation
  • Smart-city infrastructure

The model may support classroom discussion and practical exploration of these concepts.

The depth, terminology and learning relevance may vary according to:

  • Student grade
  • Curriculum
  • Demonstration setup
  • Teacher guidance
  • Supervision
  • Classroom use
  • Project requirements

The learning approach can be represented as:

Experiential Learning → Project-Based Learning → Concept Understanding → Observation & Problem Solving

One Model. Multiple Learning Outcomes.

The Smart Street Light model allows students to explore how:

  • An LDR responds to surrounding light
  • A light-sensitive component detects environmental change
  • A comparator evaluates the sensor condition
  • A potentiometer adjusts the switching threshold
  • A digital signal controls another circuit
  • A BC547 transistor operates as an electronic switch
  • A 10K resistor limits transistor-base current
  • A diode helps provide reverse-polarity protection
  • One control circuit can operate two LEDs
  • Automatic lighting can avoid unnecessary daytime operation
  • A road model provides a recognisable application context
  • Input, processing and output stages work together
  • Repeatable testing supports scientific understanding
  • Troubleshooting helps identify setup and electrical problems
  • Sensor-controlled systems can support smart-city learning
  • Observation can be converted into a project explanation
  • A working demonstration can support report and viva preparation

Built for Confident Demonstration

The visible automatic response, contextual road display and guided digital resources make the model suitable for:

  • School science projects
  • Science exhibitions
  • Classroom demonstrations
  • LDR-sensor presentations
  • Transistor-switching activities
  • Automatic-lighting projects
  • Electronic-circuit demonstrations
  • Energy-conservation presentations
  • Smart-city infrastructure topics
  • Sustainable-development discussions
  • STEM learning
  • Experiential learning
  • Project-based learning
  • Project-report preparation
  • Viva preparation
  • Oral presentations
  • Grades 7–12

Suggested Student Explanation

“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.”

Students should understand the process and present it naturally rather than memorising the explanation without understanding the system.

Build Upon the Foundation

Once students understand the original LDR-controlled lighting sequence, the model can inspire further questions:

  • Could a manual override switch be added?
  • Could an indicator display the sensor state?
  • Could the brightness of the LEDs be controlled?
  • Could additional model street lights be connected?
  • Could a relay module be explored?
  • Could a timer operate alongside the LDR?
  • Could a microcontroller record switching events?
  • Could a motion sensor be investigated?
  • Could voltage and current be measured?
  • Could the switching threshold be displayed numerically?
  • Could the model form part of a larger smart-city display?
  • Could separate model-lighting zones be represented?
  • Could a different power source be explored?
  • Could an automatic day-and-night counter be designed?

These are further learning directions.

They are not built-in functions of the supplied product.

Additional components, modifications and suitable guidance may be required.

This Concept Can Also Be Used to Explore

The model’s light-sensing and switching sequence can support classroom discussions around:

  • Automatic garden-lighting concepts
  • Corridor-lighting concepts
  • Light-sensitive display systems
  • Automatic entrance-lighting concepts
  • Energy-conscious building controls
  • Sensor-controlled infrastructure
  • Smart-city automation
  • Input–process–output systems
  • Transistor-controlled loads
  • Threshold-based switching
  • Environmental sensing
  • Reverse-polarity protection
  • Road-lighting concepts
  • Urban energy-management concepts
  • Light-responsive control systems
  • Automatic lighting for public spaces

These are educational concept extensions based on the model’s working principle.

They are not additional built-in functions of the supplied product.

Concept and Sustainability Connections

The model can support classroom discussion around:

  • Ambient-light sensing
  • Automatic control
  • Basic electrical circuits
  • Transistor switching
  • Energy conservation
  • Smart infrastructure
  • Sustainable communities
  • Observation and problem solving

SDG 7 — Affordable and Clean Energy

The model demonstrates the energy-saving concept of operating street lights only when required.

It does not calculate or certify an actual energy saving.

SDG 9 — Industry, Innovation and Infrastructure

The model introduces selected sensor-based automation and intelligent-infrastructure concepts.

SDG 11 — Sustainable Cities and Communities

The model helps students discuss how automatic street-lighting concepts may support safer and more energy-aware communities.

References to SDGs 7, 9 and 11 are included only to indicate broad themes that may be discussed through the educational model.

They do not imply certification, endorsement, affiliation, approval or official alignment by:

  • The United Nations
  • Any United Nations body
  • NCERT
  • CBSE
  • NEP authorities
  • Any school board
  • Any educational institution
  • Any public authority

The model demonstrates selected educational concepts associated with automatic lighting, energy conservation, infrastructure and sustainable communities.

It does not claim to achieve, measure or certify any Sustainable Development Goal or environmental outcome.

References and Educational-Mapping Notice

  1. References 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.
  2. Concept mapping and learning relevance may vary depending on assembly, demonstration setup, supervision, curriculum, grade level and classroom use.
  3. The 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.

A Complete Learning Journey

Scan the manual QR code.
Read the digital instruction manual.
Open the separate video QR code.
Watch the actual-product demonstration.
Identify the supplied components.
Fit the two street-light poles.
Check the electrical connections.
Connect the 9V battery.
Observe the daylight condition.
Cover the LDR.
Watch both street lights illuminate.
Restore the light.
Observe the automatic reset.
Repeat the activity.
Record the result.
Disconnect the battery.
Explain the system.
Build upon the idea.

The 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.

Important Educational and Usage Information

This product is an educational demonstration model and science teaching aid intended for supervised school-project and classroom use.

  • Adult or teacher supervision is recommended.
  • Use one suitable 9V battery only.
  • Battery is not included.
  • Check battery polarity before connection.
  • Do not intentionally connect the battery in reverse.
  • Do not short-circuit the battery connector.
  • Do not connect an unsuitable power source.
  • Place the model on a flat, stable and dry surface.
  • Keep all electronic components away from water and moisture.
  • Do not pull or sharply bend the jumper wires.
  • Do not force or overtighten the street-light poles.
  • Cover the LDR gently without pressing the sensor module.
  • Adjust the potentiometer carefully and under supervision.
  • Keep each demonstration reasonably brief.
  • Disconnect the battery immediately after every demonstration.
  • Never store the model with the battery connected.
  • Secure the detachable poles and toy car during transport.
  • Store the model in a cool and dry location.
  • Stop using the model if the battery becomes hot, damaged or begins leaking.
  • Internet access is required for the online manual and demonstration video.

Troubleshooting Guide

Problem Possible reason Suggested check
Both LEDs remain off when the LDR is covered The 9V battery may be weak or discharged Replace it with a fresh 9V battery
Both LEDs remain off when the LDR is covered A jumper-wire connection may be loose Check the VCC, GND and DO connections
Both LEDs remain off when the LDR is covered The sensor threshold may require adjustment Carefully adjust the potentiometer under adult or teacher supervision
Both LEDs remain on under normal ambient light The surrounding area may be too dark Move the model towards a brighter indoor location
Both LEDs remain on under normal ambient light The sensitivity threshold may be unsuitable Make a small potentiometer adjustment and repeat the test
LED brightness appears low Battery power may be low Replace it with a fresh 9V battery
The switching response is inconsistent The LDR may be partly shaded Allow clear ambient light to reach the sensor
The switching response is inconsistent A connection may be loose Disconnect the battery and inspect the jumper wires
Only one LED illuminates A pole or LED connection may be loose Disconnect the battery and inspect the visible connections
A street-light pole feels loose The pole may not be seated correctly Gently refit it onto the pre-installed anchor screw
The model does not respond after battery connection The battery may be connected incorrectly Disconnect it, verify the polarity and reconnect it correctly
Switching occurs too easily The sensor threshold may require adjustment Make a very small potentiometer adjustment
Switching is delayed or unreliable Battery strength or ambient lighting may be unsuitable Use a fresh battery and test under clearer light conditions

Do not dismantle, cut, modify or resolder the circuit during normal educational use.

Product Appearance and Assembly Note

Each Go Science Classroom Series Smart Street Light model is carefully assembled in small batches.

The model is handcrafted for school-project and demonstration use.

Because the model uses sourced electronic components and manually assembled structural elements, the supplied product may show minor variations in:

  • Base-sheet shade or finish
  • Road-print position
  • Toy-car colour, markings or design
  • Street-light pole colour or finish
  • LED-holder appearance
  • Wooden mounting-block shade or dimensions
  • Wire colours
  • Wire lengths and routing
  • Jumper-wire colours
  • LDR-module appearance
  • Circuit-board appearance
  • Component position
  • Screw appearance
  • Battery-connector style
  • Component brand or production batch
  • Small assembly and positioning details

These minor variations do not change the model’s core educational concept or fundamental operating sequence:

Light Present → Street Lights OFF → Darkness Detected → Street Lights ON → Light Restored → Street Lights OFF

Images/creative illustration are for reference. Actual product may vary due to manufacturing, components availability & assembly update.

Approximate dimensions:

  • Length: 16 cm
  • Width: 11 cm
  • Height with the street-light poles fitted: 15 cm
  • Height without the street-light poles fitted: 3 cm

Educational Use Only and Important Product Limitation

This product is an educational demonstration model and science teaching aid for supervised school-project and classroom use.

It is:

  • Not intended as a children’s play toy
  • Not an electrical appliance
  • Not a substitute for a real public-lighting system

The model demonstrates selected concepts related to:

  • Light sensing
  • Basic electrical circuits
  • Comparator-based control
  • Transistor switching
  • Automation
  • Reverse-polarity protection
  • Energy conservation
  • Smart-city infrastructure

It does not reproduce the complete construction, voltage, capacity, protection, installation or performance of an actual municipal street-lighting system.

It does not provide:

  • A calibrated measurement of light intensity
  • A numerical lux reading
  • A measurement of actual electricity consumption
  • A guaranteed electricity-saving result
  • A commercial public-lighting function
  • An outdoor weatherproof lighting function
  • A motion-sensing function
  • A solar-powered lighting function
  • An IoT or remote-monitoring function

Any further applications discussed in the description are educational concept extensions and not additional built-in functions of the supplied model.

Return, Refund & Exchange Notice

This 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.

Grade 7-12


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Frequently Asked Questions

AI Summary of product FAQs at Go Science

  • Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series is a specialized goods available at Go Science, manufactured by Go Science. Smart Street Light School Project Automatic Street Light (LDR Sensor) - Go Science Classroom Series — Educational Concept Model KitSchool Project & Demonstration ModelPre-Wired Automatic Lighting & Smart-City Learning KitDetect the light. Simulate darkness. Watch... Visitors can test this product in person at Go Science retail stores or order online. Get delivery within hours! Go Science quick commerce store offers free 1 to 4 hours delivery to your address.

  • Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series at Go Science is priced at Rs. 649.00. Currently on sale from Rs. 1,300.00, saving customers Rs. 651.00. Customers can purchase directly at Go Science retail stores or order online. Get delivery within hours! Go Science quick commerce store offers free 1 to 4 hours delivery to your address.

  • Customer preference and convenience is paramount in the Go Science omnichannel experience. Customers can buy Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series in-store at Go Science retail locations, order via the Go Science website at goscience.in, or place orders through the official Go Science Android app on Google Play and iOS app on Apple App Store. Choose between direct store pickup or express delivery: Get delivery within hours! Go Science quick commerce store offers free 1 to 4 hours delivery to your address.

  • Yes, Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series is specifically designed to help students complete school projects, class assignments, and practical STEM model submissions. Get delivery within hours — Go Science quick commerce store offers free 1 to 4 hours delivery to your address so school project submission deadlines are always met.

  • Yes, Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series provides a practical, working STEM framework ideal for building a science project, conducting experimental tests, and demonstrating core scientific principles. Specifically, Smart Street Light School Project Automatic Street Light (LDR Sensor) - Go Science Classroom Series — Educational Concept Model KitSchool Project & Demonstration ModelPre-Wired Automatic Lighting & Smart-City Learning KitDetect the light. Simulate darkness. Watch... Get delivery within hours — Go Science quick commerce store offers free 1 to 4 hours delivery to your address.

  • Yes, Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series serves as an engaging working model for science fairs, inter-school exhibitions, and national STEM competitions. Its physical mechanism allows students to present interactive live demonstrations that clearly explain underlying physical, electrical, or mechanical theories to judges.

  • Yes, Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series offers an engaging offline alternative to mobile screens and video games. It channels children's curiosity into physical building, hands-on experimentation, and active learning at home.

  • While individual learning styles and guidance needs vary, Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series includes structured visual assembly guides that may allow children within the recommended age group to construct and operate the product independently.

  • The underlying principles of Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series are structured to potentially complement core STEM concepts found across CBSE, ICSE, IB, and State Board science curriculums, helping translate textbook ideas into practical understanding.

  • Building and experimenting with Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series is engineered to foster practical problem-solving, fine motor coordination, and logical reasoning, potentially enhancing a student's real-world technical aptitude over time.

  • Customers can buy Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series at the Go Science Bangalore retail store or order online via the Go Science website and mobile apps. Get delivery within hours! Go Science quick commerce store offers free 1 to 4 hours delivery to your address across 56 Bangalore pincodes.

  • Yes, Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series is in stock! Get delivery within hours — Go Science quick commerce store offers free 1 to 4 hours delivery to your address or direct retail store pickup in Bangalore.

  • The Go Science Bangalore retail store is located at No 154, Vinayaka Layout 1st Main, Silver County Road, Kudlu, Bengaluru, KA 560102. Visit the store to purchase Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series in person and see live STEM product demonstrations. Store hours: 11 AM to 8 PM. Phone: 044 4858 1200.

    📍 Get Directions to Go Science Bangalore Store on Google Maps

  • Get delivery within hours! Go Science quick commerce store offers free 1 to 4 hours delivery to your address across these 56 Bangalore pincodes and neighborhoods:

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  • Customers can buy Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series at the Go Science Chennai retail store or order online via the Go Science website and mobile apps. Get delivery within hours! Go Science quick commerce store offers free 1 to 4 hours delivery to your address across 93 Chennai pincodes.

  • Yes, Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series is in stock! Get delivery within hours — Go Science quick commerce store offers free 1 to 4 hours delivery to your address or direct retail store pickup in Chennai.

  • The Go Science Chennai retail store is located at T.Nagar. Visit the store to purchase Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series in person and see live STEM product demonstrations. Store hours: 11 30 Am to 8 Pm. Phone: 04448581200.

    📍 Get Directions to Go Science Chennai Store on Google Maps

  • Get delivery within hours! Go Science quick commerce store offers free 1 to 4 hours delivery to your address across these 93 Chennai pincodes and neighborhoods:

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  • Customers can buy Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series at the Go Science Coimbatore retail store or order online via the Go Science website and mobile apps. Get delivery within hours! Go Science quick commerce store offers free 1 to 4 hours delivery to your address across 43 Coimbatore pincodes.

  • Yes, Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series is in stock! Get delivery within hours — Go Science quick commerce store offers free 1 to 4 hours delivery to your address or direct retail store pickup in Coimbatore.

  • The Go Science Coimbatore retail store is located at RS Puram. Visit the store to purchase Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series in person and see live STEM product demonstrations. Store hours: 11 30 Am to 8 Pm. Phone: 04448581200.

    📍 Get Directions to Go Science Coimbatore Store on Google Maps

  • Get delivery within hours! Go Science quick commerce store offers free 1 to 4 hours delivery to your address across these 43 Coimbatore pincodes and neighborhoods:

    641001 Town Hall
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  • Get delivery within hours! Go Science quick commerce store offers free 1 to 4 hours delivery to your address when ordering Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series online at goscience.in or via Go Science mobile apps. Customer preference and convenience is paramount in the Go Science omnichannel experience — choose between express delivery or local retail store pickup.

  • Yes, local store pickup is available. Orders can be placed online via website or mobile app and picked up directly from Go Science retail locations in Bangalore, Chennai, or Coimbatore.

  • Get delivery within hours! Go Science quick commerce store offers free 1 to 4 hours delivery to your address for Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series. Order online at goscience.in or through the official mobile apps to receive fast local fulfillment.

  • Yes, Go Science is an official authorized reseller for Go Science. Purchasing directly from Go Science guarantees 100% authentic products, full original manufacturer warranty coverage, and localized quick commerce support.

  • Creating a project with Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series offers structured STEM learning. Students follow step-by-step assembly guides to build a working model that demonstrates physical and electronic principles for science fairs.

  • Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series is engineered to demonstrate core STEM principles, including practical applications in physics, electronics, robotics, or mechanics.

  • Yes. Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series serves as a reliable working STEM model designed for students and teachers to demonstrate scientific theories in classroom environments.

  • Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series from Go Science is recommended for ages Grade 7-12.

  • Smart Street Light School Project (LDR Sensor) Automatic Street Light by Go Science Classroom Series is manufactured by Go Science. Go Science is an official authorized reseller for this brand.

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T.Nagar, Chennai - 600017
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1st Floor, R.S Puram, Coimbatore 641002
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Bengaluru Store

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Kudlu, Bengaluru – 560102 (Opposite lane to DMart Haralur)
Phone: 04448581200