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.
November 2016 - Maxim's MAX30003, an Analog Front End (AFE) for biopotentials with clinical grade...
This receiver was found in the Radio Electronics magazine of March 1953. It tunes to the medium wave...
Audio signals can be produced by this circuit. Frequency range is determined by C1 and adjusted by...