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Circuit Description
This switch can be used for controlling the automatic operation of street lights, as porch light this circuit switches on the lights at dusk and switches them off at dawn automatically. It can also be used on tall buildings and T.V. towers etc. where a red light is used to warn the approaching aircraft. Light dependent resistor (LDR) is used to sense the ambient light level.
Circuit Diagram
Components Required
1. Switch
2. Resistance- R1- 470Ω
3. Variable resistance- VR1-50kΩ
4. IC 555 Timer
5. LED
6. LDR
7. Battery 9-12v DC
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