Multi-Tester Logic Probe Signal Tracer And Injector

2016-01-19 16:08  
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This circuit for a test set contains a signal injector (U1A/U1B) and associated com
Multi-Tester Logic Probe Signal Tracer And Injector

ponents, a logic probe (U1C) and an audio amplifier. SI selects either 10-kHz or 100-Hz output. U1D, U1E, and U1F form an audio amplifier that drives a piezo sounder element without an internal driver so that it functions as a piezoelectric speaker.



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