Simple LED Emergency Light Circuit
A very simple and useful circuit of a emergency lamp. The circuit is using 12 volt battery. The circuit will turn on 1 watt LED when there is no light on the surface of the LDR. This is a versatile circuit and can be used for many purposes. You can use it in your room if you are facing power failure problems.
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You can setup up this circuit near your room lamp so when the LDR surface detect no light it will turns on the 1 watt LED. This circuit is so small can be easily fitted in a small box.
