The Big Easy Driver, designed by Brian Schmalz, is a stepper motor driver board for bi-polar stepper motors up to a max 2A/phase. It is based on the Allegro A4988 stepper driver chip. It's the next version of the popular Easy Driver board. Each Big Easy Driver can drive up to a max of 2A per phase of a bi-polar stepper motor. It is a chopper microstepping driver which defaults to 16 step microstepping mode. It can take a maximum motor drive voltage of around 30V, and includes on-board 5V/3.3V regulation, so only one supply is necessary. Although this board should be able to run most systems without active cooling while operating at 1.4-1.7A/phase, a heatsink is required for loads approaching 2A/phase. You can find the recommended heatsink in the related items below. Note: This product is a collaboration with Brian Schmalz. A portion of each sale goes back to him for product support and continued development. Features * Bi-polar Microstepping Driver * 2A/Phase Max * 1.4-1.7A/Phase w/o Heatsink * Max Motor Drive Voltage: 30V * On-board 5V/3.3V Regulation Resources * Schematic * Eagle Files * Hookup Guide * Datasheet (A4988) * Design Site * GitHub https://elecena.pl/product/22720919/sparkfun-big-easy-driver 2023-03-07 https://elecena.pl/product/22720919/sparkfun-big-easy-driver 2023-06-28 https://elecena.pl/product/22720919/sparkfun-big-easy-driver 2023-11-10 https://elecena.pl/product/22720919/sparkfun-big-easy-driver 2023-12-27 https://elecena.pl/product/22720919/sparkfun-big-easy-driver 2024-09-19 https://elecena.pl/product/22720919/sparkfun-big-easy-driver 2024-11-29 https://elecena.pl/product/22720919/sparkfun-big-easy-driver 2024-11-30 https://elecena.pl/product/22720919/sparkfun-big-easy-driver 2025-04-10 https://elecena.pl/product/22720919/sparkfun-big-easy-driver 2025-04-30 https://elecena.pl/product/22720919/sparkfun-big-easy-driver 2025-08-05 https://elecena.pl/product/22720919/sparkfun-big-easy-driver 2025-11-28 https://elecena.pl/product/22720919/sparkfun-big-easy-driver 2025-11-29