LDR Based Automatic Street Light Using Arduino
Design an automatic street light system using LDR and Arduino that turns lights ON at night and OFF during daytime, saving electricity.
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₹3753.00
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Components
8 items
Difficulty
Beginner
Build Time
30-45 minutes
Project Details
How It Works
How It WorksThe project uses an LDR (Light Dependent Resistor) connected in a voltage divider circuit with a 10kΩ resistor. The Arduino reads the analog voltage at the junction (pin A0). When ambient light is low (night), LDR resistance is high, resulting in higher voltage at A0. When light is high (day), LDR resistance is low, resulting in lower voltage. The Arduino code compares this value to a threshold (400). If below threshold (night), it turns ON the LED via digital pin D8. If above threshold (day), it turns OFF the LED. This creates an automatic street light system that responds to natural light conditions.
Prerequisites
Basic understanding of Arduino programming and electronics. Familiarity with digital and analog pins, basic circuit connections, and the Arduino IDE. No advanced electronics knowledge required.
What's Included in the Kit
| Component | Qty | Price |
|---|---|---|
 | 1 | ₹767.00 |
 | 1 | ₹0.00 |
 | 1 | ₹2.00 |
 | 1 | ₹400.00 |
 | 1 | ₹5.00 |
 | 1 | ₹77.00 |
 | 8 | ₹1369.00₹171.00 × 8 |
 | 1 | ₹190.00 |
Operating Instructions
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