Continuity Test (CB10586E)

Details
Written by: Newton C. Braga

 

This circuit was published in a 1983 English magazine, but it can be easily assembled using BC548 for the transistor. The transducer is a piezoelectric type and the power can be supplied with voltages from 6 to 9 V. The circuit produces an intermittent tone as well as LED flashes when the circuit under test is continuous.

 


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