Big Easy Driver - Stepper Motor Driver

Description: The Big Easy Driver, designed by Brian Schmalz, is a stepper 

motordriver 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 sales 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

Documents:

• Schematic

• Eagle Files

• Hookup Guide

• Datasheet (A4988)

• Design Site

• GitHub