Diode tester

Posted on Aug 25, 2012

The circuit tests whether or not a diode is open, shorted, or functioning correctly. If lamp A lights, the diode under test is functional. When lamp B is lit, the diode is good but connected backwards

Diode tester
Click here to download the full size of the above Circuit.

When both lamps are lit, the diode is shorted, and it is open if neither lamp is lit.

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