While there are a couple of open-source brushless drivers ... the shield successfully drives a motor in open-loop mode. The motor controller is commanded over the Arduino’s serial interface ...

The Arduino has been used for many purposes, and “shields” are available to make many common tasks easier. However, [Nick] wanted a stackable motor driver shield, so he build one himself!.

The project uses an Arduino Uno R3, Arduino Mega 2560, Arduino CNC Shield V3 GRBL, Stepper Motor Driver A4988 and Arduino ... the motor control module must have a higher voltage level, such ...