4 types of basic circuits of the single steady trigger composed of 555

Published:2011/7/24 1:43:00 Author:Seven | Keyword: single steady trigger, basic circuits | From:SeekIC

In Figure (a) is the typical single steady circuit. When an external pulse is added on the 2-pin of 555 after being past the C1 and R1 differential circuit, the forward pulse makes 555 offset, 3-pin is outputting a contemporary stable pulse width td=1.1RC. Figure b is like figure a, but it has 2 output terminals. C discharges the internal current of 555 through R, the recovering time is longer than that of Figure a. In figure c, the 2-pin and 6-pin of the circuit are different from figure a and figure b, the external trigger should be a forward pulse.



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