The logic high and low LEV LED digital display circuit

Published:2011/8/3 23:23:00 Author:Seven | Keyword: logic, LEV, digital display | From:SeekIC

Here is to introduce the logic probe detector indicated by LED, the circuit is simple and direct, and it needs no debugging while manufacturing, the circuit is shown in figure 1. The circuit structure and working principle is shown in figure 1, IC 1(N1 and N2) is 6 phase reversers 7404, there are only 2. IC2 and relevant elements compose the dual steady circuit. The switch S1 composes the 555 dual steady reset circuit. LED1 and LED2 are 2 common positive digit tube.



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