Please use the information to download, copy the following contents in parentheses to the browser into the network disk to download (no registration required):
??pan.baidu.com/netdisk/singlepublic?fid=732767_3186723281??

Driver board Description:
Dimensions: 16 × 28mm, maximum 10mm, compact size, sophisticated technology
Use ULN2003A power Darlington chip stepper motor drive
A, B, C, D LED indicates the status of the four-phase stepper motor at work
Stepper motor with a standard interface, when used directly pluggable
With 3mm diameter screw holes for easy assembly using fixed
Interface Description: VCC and GND power input range of 5-24V, IN1-IN4 the corresponding test program 51 MCU P0.0-P0.3