【Chip load】Stepper Motor Driver Board Module's onboard ULN2003A motor driver chip, because it has no brush, has high reliability and can perfectly drive various types of loads and operations. prompt】The angle of rotation of the motor of this product is proportional to the number of pulses.This product has 4 indicators on the board, which allows you to know the status of the driver board according to the indicators during use. 【Scope of application】Stepper Motor Driver Board Module can adopt open-loop control, which makes the structure of the motor relatively simple, and can be used in situations where precise positioning is required, precise control of the angle of rotation, and low speed is required. 【Easy to use】All pins of the chip have been removed for easy connection and use. With onboard XH-5P socket, can be directly connected to 28BYJ-48 stepper motor. 【High voltage supply can be used】Since the speed is proportional to the pulse frequency, there is a wide range of speeds. This product is powered by a 5-12V power supply and is suitable for a variety of systems requiring high speed and high power drive.