Onboard ULN2003A motor driver chip.
Chip commonly used pin has led, convenient connection to use.
Pin 5 to 12 v power supply.
Onboard four-way signal lamp 4, and 5 p onboard needle socket, can be connected directly to 28 byj - 48 models of stepper motor.
PCB board size: 21(mm) x15.5 (mm).
1x MINI ULN2003 module