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More  Light Dependant Resistors Circuits

Dark Activated 12v Power Supply Switch

Using an inexpensive phototransistor, this circuit switches 12v to 24v power to a load, whenever the sun goes down.

Click on Drawing Below to view PDF version of Schematic

Circuit 6V to 24V DC Day / Night Switch Circuit designed by David A. Johnson, P.E. (June 30, 2006)



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