- Published in issue 7/1997 on page 80
PC controls two stepper motors
This circuit allows a PC or a suitably programmed microcontroller system to control a stepper motor. Rather than relying on the latest in dedicated motor controller ICs, this interface is based on ordinary eMOS logic, discrete transistors and one ULN power driver IC. The Interface is designed with extension in mind, because a doughterboard may be added to control a second stepper motor.