Simple light-switch circuit

Published:2012/9/12 20:49:00 Author:Ecco | Keyword: Simple light-switch | From:SeekIC

The circuit is a light switch who triggers when light drops on photo resistor. It is fairly simple in construction and can be used in a million applications. The photoresistor and the trimmer work as a voltage divider and also polarize the transistor TR1. TR1 triggers TR2 and TR2 drives the relay. Trimmer R7 is for adjusting the sensitivity of the circuit.



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