Automatic Light Control System using LDR and Arduino

📌 Description

This project automatically controls an LED based on light intensity using an LDR sensor and Arduino Uno.

⚙️ Components Used

• Arduino Uno
• LDR (Light Dependent Resistor)
• LED
• Resistors (10kΩ, 220Ω)
• Breadboard and wires

🔌 Circuit

LDR and resistor form a voltage divider connected to A0. LED is connected to pin 13 through a resistor.

🧠 Working

• LDR senses light intensity
• Arduino reads analog values (0–1023)
• Dark → LED ON
• Bright → LED OFF

💻 Code

See code.ino file

🧪 Output

• Cover LDR → LED ON
• Shine light → LED OFF

🔌 Working Without Laptop

After uploading the code, Arduino runs independently using a power supply.

🌍 Applications

• Street lights
• Garden lighting
• Smart homes

✅ Advantages

• Low cost
• Energy efficient
• Easy to build

📸 Project Images

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