Voltage and Current Limited Audible Continuity Tester circuit

Published:2013/3/29 4:31:00 Author:Ecco | Keyword: Voltage and Current, Limited Audible, Continuity Tester | From:SeekIC

Using this continuity tester circuit, a failure of PCB tracks be examined without looking directly at the tracks routing, which is can be very frustrating. The indication of this circuit is done by an audible alarm (a buzzer). This circuit can be used to indicate continuity below any resistance value up to 35 ohms by adjusting the circuit. To make sure this circuit doesn’t damage any installed parts on the board, the voltage and current of this circuit is limited. Here is the schematic diagram of the circuit:



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