The rotating speed test circuit formed by NE555 and so on

Published:2011/5/26 23:18:00 Author:Borg | Keyword: rotating speed, test circuit | From:SeekIC

The input frequecy is a responding signal to rotating speed. The signal is shaped by the Schmidt trigger circuit which is formed by VT1 and G1, and then is differentiated by G2 and G3, then the pulse signal triggers the signle-stable multivibrator which consists of NE555. The 3-lead output comes across G4, and then runs through R2 and C2 to be integrated, finally comes across A1 buffer and comes out from the drive meter. At the same time, the output pulse width of G4 is t, amplitude is Ue, frequency is (equal to the frequency of input signals), and the output voltage of A1 is U.



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