How to Control a Stepper Motor Using a Computer. Stepper motors produce accurate, computer-controlled motion for applications such as robotic arms and paper-feed mechanisms for printers.

Controlling the motors is done through [Guy Carpenter]’s Switec X25 library for the Arduino, allowing an Arduino Uno to control up to three stepper motor gauges simultaneously.

Featured on the Arduino Project Hub, the project is open source and uses an Arduino UNO and Nano (above). It displays the pressure via a 12″ (300m) analogue display using three stepper motors, but ...