Automatic lighting control circuit

Published:2011/7/25 22:37:00 Author:Christina | Keyword: Automatic, lighting control | From:SeekIC

The core component of the radar type automatic lighting control circuit is the microwave detector module TWH9250. The detection range of this circuit is more than 5m, when someone gets into the detection range, the circuit is triggered, the output port of TWH9250 outputs the low level, the relay K gets power to close, the light turns on, until the person leaves the detection range for 10 seconds, the circuit will reset, the light turns off. The R port of TWH9250 is connected with the photoconductive resistance, so it has minimal resistance value in the day time, the potential of R port is pulled down, the circuit will not work.



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