Each road stepper motors only need two IO ports
This expansion board as a driver expansion board, can be used for engraving machines, 3D printers.
It is a total of four slots, can drive four A4988 stepper motor.
Stepper motor wiring as follows: 2A, 2B is a group (red, green), 1A, 1B is a group (blue, yellow), if want to change direction, can be change the position of one group , for example 2A, 2B mutually exchanged.
Note: When inserting the A4988 module, must be careful not to insert opposite

Technical Details

Size (LWH): 6 inches, 3.3 inches, 1.2 inches
Product Details
Product Dimensions: 6 x 3.3 x 1.2 inches
Shipping Weight: 0.06 pounds (View shipping rates and policies)
ASIN : B015DKD24W