Package included: 1 X A4988 CNC Shield Expansion Board
Each and every road stepper motors only need two IO ports
This expansion board as a driver expansion board, can be utilized for engraving machines, 3D printers.
This 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 wish to change direction, may also be change the location of one group , for instance 2A, 2B mutually exchanged.
Note: When inserting the A4988 module, will have to watch out to not insert opposite