|DRV8825-based stepper motor driver module|
A 20x15mm module based on the DRV8825 stepper motor driver IC. It runs off 8.2-45V with a 2.5-5.25V logic supply. It is rated for an output of up to 1.5A per phase and it supports microstepping.
It comes with a small stick-on heatsink which is not required in all applications. For more details, see the February 2019 El Cheapo Modules article on Stepper Motor Drivers.