So he started to wonder if he could skip the controller entirely and connect the stepper motor directly to the digital pins of an Arduino.

grbl is stepper motor controller firmware for three-axis cnc machines, intended to run on Arduinos with a motor driver add-on board. Engineer in Wonderland cnc-related blogs are indexed here It is the ...

Mechaduino is a board that sits on a regular stepper motor and turns it into a servo with a closed loop control of 0.1degree.