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Porch Light Control Circuit

2014-12-10 03:15  
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This circuit can control the on/off cycle of a light via a CDS photocell, and turn it off after a preset period. The light can only be turned on when CDS cell is in darkness, and it stays on for a time determined by the 555 circuit.
Porch Light Control Circuit

On time depends on R1 and CI and is about 80 seconds with the values shown.

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