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.
Powered from 20 V dual power supply this circuit sources 20 W to a 4 ohm loudspeaker. The IC is...
This circuit using a SIDAC is suggested by ON Semiconductor in its thyristor manual. The circuit...
This circuit was found in a 1967 American documentation. The switching diode (tunnel) used is an...