the VDD and Ground pins that we need to connect them to a power supply of 3 to 5.5 V and in our case that will be our controller, the Arduino Board which will provide 5
This is suggested wiring for running the examples unmodified. All the pins below can be changed. Arduino to driver board: DIR - D8 STEP - D9 GND - Arduino GND GND - Motor power GND VMOT - Motor power (check driver-specific voltage range) ...