Large Range Variable Duty Ratio Square Wave Generator Circuit

Published:2011/5/6 2:38:00 Author:Sue | Keyword: Large Range, Variable, Duty Ratio, Square Wave, Generator | From:SeekIC

As seen in the figure, 555 and R1,R2,RP1,D1,D2,C1 constitute a astable multivibrator. D1 and D2 serve as guide tubes for charge/discharge circuit. We can se from the formula above that, no matter how RP1 varies, it has no influence on oscillation period T. The oscillation frequency shown in the figure is about 20Hz.



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