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 using components that are still common in our market was found in a 1987...
This circuit is based on the well-known PLL 567 and can operate at 100 kHz. The transformer can be...
The simplest flip-flop can be built with two NAND gates as shown here. This is a Reset-Set [S-R]...