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.
This sophisticated sinusoidal audio signal generator uses a Wien bridge configuration with an...
The circuit shown in the figure makes it possible to control a stepper motor via the serial port...
This circuit was found in a documentation from the 60s. The drive transistor is a power...