Control Extension Shield Board 3D Printer Stepper Motor Driver with A4988 DRV8825 Dupont Cable,for 3D Printer Accessories

Very easy to connect to an Arduino Uno. Connect the Arduino power jack to a 9volt or above power supply. Then connect 6 pins from the arduino to the carrier board (5v, Vin, grounds, direction, and step) and you can easily control a stepper motor with greater accuracy and less noise. Be sure to adjust the potentiometer for correct current supplied to the stepper to prevent overheating the stepper and this module. Using lower current results in even less noise from the stepper, but you will sacrifice some power.

There are dip switches that has no understanding on what is up. Total frustrating wait to get it then they send a hand full of electronics.I will be sending it back.