This control circuit or reversible contactor was found in a 1967 General Electric manual. The triacs must be in accordance with the power of the controlled load.
Other operational amplifiers series, such as the MC34072, MC34074, MC35071, MC35072, MC35074 d...
This symmetrical power supply with a current of the order of 100 mA was found in an old...
This circuit for semiconductor laser excitation and modulation was found in an American...