This circuit is one of many that the reader can find in this section for testing crystals. The circuit uses an indicator LED. Transistor Q1 determines the maximum crystal frequency that can be tested.
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...
It can be obtained from Mouser Electronics new evaluation module for 1A stepper motors control...
This circuit, found in a 1994 documentation, uses 20 A 2N5448 triacs or equivalent and should be...