Latching Continuity Checker

  
This circuit detects brief shorts or opens. When S2 is in the up position, the circuit indicates if there is or
Latching Continuity Checker - schematic

was continuity by lighting LED1. U1A and U1B are connected as an R-S flip-flop. SI resets the tester. When S2 is in the down position, a momentary interruption in continuity will light LED1. This tester is good for detecting intermittent shorts or opens.




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