1. For A4988 / DRV8825 2. Jumpers are hit on the DP position represents 16 segments (4988) or 32 segments (8825). 3. Jm connected to the motor. 4. Jv connect 5V and 12V-24V power supply 5. Jc E / S / D / G corresponding to the connection on the Enable Step Dir Gnd drive signal output. 6. Size: 34x41mm
Note the direction of the installation, or may burn the driver or even the motherboard.