Leveraging the Trinamic TMC2208 stepper motor driver gives Ethersweep silky smooth and quiet motor control, which could ... with the cheap CP2102 USB bridge chip as per most Arduino-like designs.

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 ... SAMD21 ARM M0+ chip. They wanted the board to be as accessible ...