- Use ULN2003 driver chip, 500mA
- A. B. C. D LED indicating the four phase stepper motor working condition.
- White jack is the four phase stepper motor standard jack.
- Power pins are separated
- We kept the rest pins of the ULN2003 chip for your further prototyping.
- IN1-4 to the MCU pins
- The pins in the white jack (from left to the right) are: VCC, A, B, C, D (to the stepper motor)
- Power pins are on the right, use jumper to choose either 5V or 12V