Automatic Porch-Light Control Circuit

  
The automatic porch-light control circuit holds a triac on until a 4020 divider counts a number of 60-Hz powerlinc pulses. The circuit turns off a light after a predetermined time by using pins other than pin 3 of III. Various times can be set.
Automatic Porch-Light Control Circuit - schematic

Consult the 4020 data sheet for information.




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