We found this version of the automotive tachometer in a 1980s publication. Variations from other sources appear elsewhere in this section. The indicator is a 0 to 1 mA milliammeter.
This remote-control circuit was found in Radio Electronics magazine from June 1962. It drives a...
In the figure we have a bistable multivibrator using an operational one. The circuit is from old...
The circuit shown in the figure uses general purpose NPN transistors and can be used to generate...