This easy-to-build circuit helps detect darkness using an LDR (Light Dependent Resistor) and a transistor.

components required:

1. 1 x Transistor BC547
2. 1 x LDR (Light Dependent Resistor)
3. Resistors:
• 1 x 1MΩ
• 1 x 1KΩ
4. 1 x Breadboard

Circuit Diagram

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