Continuity Tester II

Posted on Feb 2, 2013

Our CONTINUITY TESTER gives an audible indication of continuity between the probes so you can keep your eyes on the probe tip. Secondly its response-time is very short so that you can make lots of tests very quickly while listening for the beep. And thirdly it only responds to a definite short circuit or one that has a resistance of 50 ohms or less. It will not respond to values above 80 ohms or the voltage drop across a diode.

Continuity Tester II
Click here to download the full size of the above Circuit.

As we mentioned, the circuit detects resistance values of 50 ohms or less between the probes and allows an oscillator to turn ON and produce a tone from the piezo diaphragm. A LED is also included on the board to indicate when the unit is ON as the circu

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