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A new and improved version of the Easy Driver board, the Big Easy Driver by SparkFun can drive bipolar stepper motors at up to 2 amps per phase.
This Big Easy Driver stepper motor driver is based on the Allegro A4988 chip, a bipolar stepper motor driver capable of handling up to 2A/phase. Its settings default to 16 step microstepping mode.
Your bipolar stepper motor driver includes 3.3/5V regulation, you therefore need just one supply.
The Big Easy Driver can easily manage 1.4 to 1.7A/phase. However, if the load begins to approach 2A, you’ll need to get your hands on a heat sink to eliminate all risk of overheating.
You’ll find all the information you need for using your Big Easy Driver correctly below: