Motor controller with spare IO pins?

Can anyone recommend an Arduino-compatible stepper motor controller that has at least seven unused IO pins?

I want to drive a rotary indicator and pair it with a 7-segment numeric display for maximum usability.

Tolerance for hostile environment (rough power, high temperatures, vibration) required.

Motor is very low power unit.

Small size preferred.

Thanks everyone!

Hi Ian,

I’d suggest taking a look at the little A4990 motor driver:

As for protecting it in harsh environments, I’d suggest looking into coating your electronics with Conformal coating and placing them inside a sealed enclosure. Vibration will kill pretty much everything eventually, so it’s worth soft mounting the electronics as well by using soft rubber mountings.

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