The on-line tester circuit of diodes and triodes

Published:2011/6/10 1:36:00 Author:Seven | Keyword: on-line tester, diodes and triodes | From:SeekIC

In the circuit is the on-line tester circuit of diodes and triodes. The tester consists of the multi-resonate oscillator and single steady trigger centralized on the dual time-based 556 circuit, LED1 and LED2, etc.The multi-resonate oscillator consists of half of 556, R1 and C1, etc, whose oscillating frequency is f=1.44/R1C1. The single steady trigger consists of the other half of 556, by which the output poles of 5-pin and 9-pin output a couple alternating square wave testing signals, and the couple of signals have opposite polarities and the peak voltage is 9v, the frequency is 5Hz.



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