Adafruit STSPIN220 Stepper Motor Driver Breakout Board

Stepper motors are used for CNC machines, 3D printers, and whenever else one needs precise, powerful motion. But to get good behavior from steppers, you need a motor driver chip that can provide high bursts of current, and for smooth motion, be able to PWM that current for microstepping support. You can DIY this with a lot of timers, a microcontroller, and an H-Bridge chip - or you could take the easy way out and use an Adafruit STSPIN220 Stepper Motor Driver Breakout Board, which makes controlling stepper motors easy-breezy, with a simple GPIO-only interface.