This circuit for cars with fans was found in Silicon Chips documentation from the 90s. It is used to activate the fan when the radiator water temperature rises.
This circuit rejects frequencies around 1 kHz and can be adjusted using C1. Equivalent operational...
This is an old circuit with a homemade sensor found in the September 1995 Electronics Now...
July 2017 - The new Schottky rectifiers from the FMX series for currentes from 1 to 3 A from...