8-35V 2A Single Bipolar Stepper Motor Driver A4988 Black Edition

PololuSKU: RB-Pol-235
Manufacturer #: 2128

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  • Controls one bipolar stepper motor at up to 2A output current per coil
  • Provides full-step, half-step, quarter-step, eigth-step and sixteenth-step resolutions
  • Intelligent chopping control to automatically select the correct current
  • Operating voltage: 8 to 35V

The 8-35V 2A Single Bipolar Stepper Motor Driver A4988 Black Edition is a higher-performance drop-in replacement for the original A4988 stepper motor driver carrier.

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Customer Reviews

Based on 7 reviews
John P
Works great

I hooked it to a NEMA-17 geared stepper and had no trouble interfacing to a raspberry pi. Very small PCB. I run the motor with a light load and board does not get hot. Not hard to solder in the two header strips if you need to. I ran wires to some holes, and put headers in the rest. Make sure you pull up the RESET pin, as it will float low and turn off the driver. Have not tried to adjust the current limiting pot, though I looked at the instructions and it seems a little complicated, but glad to have the flexibility built in.

Works well

Is all it is advertised as

timely delivery

Does what it says.

Works great, but remember ramp up!!

After struggling with a stuttering stepper motor setup for months, this little driver finally worked fine. The crucial tip is don't forget about your startup velocity ramp. It has to be linear increase in speed (not linearly decrease in step period, which produces an exponential ramp up), and it has to be slow enough to accommodate your particular motor setup. That could save you needing to upgrade power supplies, motor torque, etc, as I did in vain.

Works well

Recommend watching the Pololu video on setting the reference voltage for help setting this up.

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