The Automatic Street Light Kit using Arduino UNO and LDR Sensor is a beginner-friendly DIY educational project designed for students, science exhibitions, engineering mini projects, and Arduino learning.
This project automatically turns the LED light ON at night or in darkness and switches OFF during daytime, similar to Smart Street Light Systems, Solar Street Lights, and Home Automatic Night Lamps.

This kit helps students learn the working of sensors, analog input reading, decision-making logic, and code-based automation. It is also commonly searched as Arduino Automatic Light Project, LDR Sensor Based Night Lamp, Smart Lighting Arduino Project, Automatic LED ON/OFF System using Arduino, IoT Light Control Project, Arduino Beginner Kit with Sensor, or DIY Arduino Light Control Project.

Assembly is solder-free using a breadboard and jumper wires, making it ideal for school science fair projects, STEM education kits, robotics labs, and first Arduino programming practice.

Users can also later upgrade the same project to control relay modules, AC bulbs, or solar street light models, making this kit reusable and expandable.

CODE

// Automatic Street Light using Arduino + LDR Sensor Module

int sensorPin = 12;
int ledPin = 9; // LED output pin

void setup() {
pinMode(sensorPin, INPUT_PULLUP);
pinMode(ledPin, OUTPUT);
}

void loop() {
int sensorState = digitalRead(sensorPin);

if (sensorState == LOW) {
digitalWrite(ledPin, HIGH); // Dark → LED ON
} else {
digitalWrite(ledPin, LOW); // Light → LED OFF
}

delay(200);
}

Applications

• Automatic Street Light Model

• Home Automatic Night Lamp

• Solar Light Demonstration Model

• Arduino Smart Lighting System

• Sensor-Based Automation Experiment