Stepper Driver Module consists of ULN2003-IC  which is used to drive the stepper motor.

Product Description

•     Size: 42mmx30mm

•     Use ULN2003 driver chip, 500mA

•     A. B. C. D LED indicating the four phase stepper motor 

•     White jack is the four phase stepper motor standard jack.

•     Power pins are seperated

 

Connections:

•   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

Data Sheet:

          ULN2003-IC datasheet