Found in a 90's EDN, this circuit controls both the speed and the direction of rotation of a stepper motor. Relays can be replaced by MOSFETs, with circuit adaptations.
Found in an Analog Devices documentation from the 90s, this circuit uses a component of the time,...
This circuit was found in Philips documentation from 1965. No information was given about the...
This circuit was found in the June 1990 issue of Radio Electronics magazine. Integrated circuits must...