Light/Dark Switch With Relay


Posted on Feb 5, 2014

The circuit as shown act as a light detector. Under normal conditions the resistance of the LDR is high, keeping pin 2 low. When light falls onto the LDR the resistance drops to a couple hundred ohms and triggers pin 2 high which biases the base of Q1 via pin 6 and R4 and in turn activates the relay. Light/Dark switch Circuit with relayAs.


Light/Dark Switch With Relay
Click here to download the full size of the above Circuit.




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