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 configuration is from an old integrated circuit manual. The circuit can be applied to modern...
This circuit is used to test an inductor (coil) allowing the observation of its opration in an R-L...
We found this circuit in the ON Semiconductor Thyristor Manual although similar configuration can be found...