_LIGHT_CONTROLLED_ONE_SHOT_TINER

Published:2009/7/7 21:27:00 Author:May | From:SeekIC

This circuit uses A1 of the CA3290 BiMOS dual voltage comparator to sense a change in light diode current. A2, a one-shot timer, is triggered by the A1 output. If the light source to the photodiode is interrupted, the circuit output switches to a low state for approximately 60 s.



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