Quartz crystal tester circuit


Posted on Feb 7, 2014

This a very simple and inexpensive circuit that can be used to test quartz crystals. Here a Colpitts oscillator is wired used the transistor T1. When the crystal is connected between terminals A and B the circuit will produce high frequency oscillation. The oscillations will be generated only if the crystal is a good one. The diode OA91 will rectify t


Quartz crystal tester circuit
Click here to download the full size of the above Circuit.

hese oscillations and it can be visually identified from the meter. The deflection of the meter will be directly proportional to the activity of the crystal.




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