This is the circuit of an automotive voltage regulator from the 1970s. The circuit is entirely electromechanical based on the closing of a relay contacts according to the voltage.
This circuit, obtained in a 1983 magazine, can drive loads up to 100 mA if the transistors are...
It is possible to design a monostable multivibrator around a voltage comparator of the four...
This voltage inverter circuit is from a Radio Eklectronics from October 1965. It was used in...