Pololu item 2128 A4988 Black Edition carrier for one bipolar stepper motor. App-facing contract covers logic supply, motor supply, STEP/DIR control, microstep pins, reset/sleep, and motor coil outputs.
Required
Required
Required
Required
Required
Optional
Optional
Optional
Optional
| Pin | Type | Function |
|---|---|---|
| VMOT | Power | Required |
| VDD | Power | Required |
| GND | Ground | Required |
| STEP | Signal | Required |
| DIR | Signal | Required |
| EN | Control | Optional |
| MS1 | Signal | Optional |
| MS2 | Signal | Optional |
| MS3 | Signal | Optional |
Required
Required
Required
Required
Required
Optional
Optional
Optional
Optional
PWM · I2C · UART · Wide input · Breakout
Verify supply voltage and logic levels before powering up.
Module pins: VMOT, VDD, GND. Schematik maps them to your board in the app.
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