ULN2003 Stepper Motor Driver Board

This board puts the ULN2003 darlington transistor array, the standard driver chip for small unipolar stepper motors like the 28BYJ-48, on its own breakout rather than bundled together with a motor. That makes it the right pick for anyone who already has a spare unipolar stepper motor on hand, or whose driver board burned out and needs a direct replacement, without paying for another motor they don't need. The board accepts simple four-step digital sequencing from a microcontroller and switches enough current to drive the motor's coils directly, with onboard indicator LEDs that make it easy to watch the step sequence firing correctly while debugging motor wiring or driver code.