Digital engine tachometer circuit

Published:2011/4/27 21:11:00 Author:Christina | Keyword: Digital, engine tachometer | From:SeekIC

The tachometer shows the engine's crankshaft speed. The digital engine tachometer circuit is as the figure shown, this tachometer has a input signal conditioner (composed of u1 and u2-a), a pulse counter us, display drivers u4 and u5 drive two electronic display devices disp1 and disp2, a main clock u6 and a power regulator u7. Input signal is from the pulse signal of the engine ignition system distributor's breaker contact-point, this output signal is the circuit-trig signal. +5V power is supplied by the regulator u7, power of u7 is supplied by the 12v car power supply. The tachometer shows the two significant figures of the engine speed.



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