Electronic Circuits and Tutorials
Electronics Schematics - R

Tachometers / Revolutions Per Minute -
RPM Circuits

Analog Tachometer for Gasoline Engines: 

Available-light photo tachometer simplifies outdoor remote sensing:  01/25/99 Electronic Design - Ideas for Design / Tachometry, the measurement of the speed of rotating objects, is a common enough application that has many practical but few noteworthy solutions. Some of these jobs, however, have quirky aspects.

Digital Tachometer Avoids Analog Vices: 11/10/94 EDN-Design Ideas / (requires a password)

Optical Tachometer Provides Bi-Directional Info: 05/21/98 EDN-Design Ideas / (requires a password)

Simple Circuit Measures Diesel's Rotations Per Minute: 03/04/99 EDN-Design Ideas / PDF contains multiple circuits - scroll to find this circuit. (have to obtain a password first)

Speed Limit Alarm:

Tachometer Demodulator has Fast Response Time: 12/07/95 EDN-Design Ideas /  (requires a password)

Wireless Auto Tachometer:

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