Drehzahlregelung für Reihenschlussmotore (Universalmotor, Bohrmaschine, Lochscheibe als Tacho, 74121,Triac)

Many circuits using, for example, both op- amps and logic circuits, require more than one · supply voltage. The circuit described here is designed to supply four voltages of + 12, +S, - 7 and -12 volts, with a maximum current of SO, 300, SO and again SO mA respectively.