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 circuit consists of a 10 + 10 V symmetrical source that operates from a single 5V input. It is...
This circuit covers the bands from 1.8 to 150 MHz, with plug-in coils whose characteristics are...
In this project, from a Japanese magazine of 1973, only one channel of a stereo amplifier of 20 W...