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.
September 2016 - It can be obtained from Mouser Electronics coils for inductive battery chargers...
This shield can be used both to interface TTL circuits and microcontrollers. The resistor in...
The circuit shown in the figure consists of a phase shift oscillator and its components have been...