DISTRIBUTOR_POINT_TACHOMETER

Published:2009/6/28 22:48:00 Author:May | From:SeekIC

555 timer receives its input pulses from distributor points of car. When timer output (pin 3) is high, meter receives calibrated current throung R6. When IC times out, meter current stops for remainder of duty cycle. Integration of varoable duty cayle by meter movement serves to provide visible indication of engine speed.- Signestic Analog Data Manula, Signetics, Sunnyvale, CA, 1977, p 724-725.



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