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 uses a photocell as sensor and a sensitive relay according the power supply voltage....
August 2016 - It can be obtained from Mouser Electronics thenew broadband ADCs ADS127L01 from...
We found this filter in the 1990 Motorola Linear Databook, but it can be implemented with other...