Another of the many tachometer circuits we have on our site. This one is from the September 1976 Radio Elecronics magazine. The circuit is connected to the platinum contacts of a car or to a sensor.
It is an ideal circuit for troubleshooting a bench, in addition to testing devices after repair, with...
This circuit controls an external light that turns on at dusk and off in the morning. The circuit is...
This circuit works both as a grid-dip (transistorized) and as an oscillator. The circuit is from a...