4QD TEC Circuits Archive Automobile Circuits

Tach and Dwell Meter

This circuit as first published in Wireless World September 1975 and subsequently in MECRM.

It's built around a TTL quad NOR gate, though CMOS could be used (with minor alterations to the circuit).

TachDwell/png

Calibration details were given in the original article.

Page Information


© 2001- RJT
First published: 22nd April 2002.
Page's Author: Richard Torrens