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.
We found this circuit in the June 1991 issue of Radio Electronics magazine. The integrated circuit is...
This sensitive 5-band circuit was found in a September 1995 issue of Electronics Now magazine. The...
This RF amplifier step has a dynamic range of 140 dB and can amplify signals from 0.5 to 40 MHz....