Suitable for singlechip learning machine learning projects or driving air conditioning strip systems and camera monitoring direction adjustment. Key benefits stepper motor with gear reduction delivers extremely low noise and stable, smooth operation. Open interface enables driving other stepper motors through this board. MCU developers can easily use the open interface, and the board can drive other stepper motors, compatible with platforms such as 51/AVR/ARM. Main features Function: stepper motor drive with gear reduction for quiet and stable performance. Compatibility: open interface designed for MCU development; suitable for 51/AVR/ARM platforms. Expandability: can drive other stepper motors through this board. 23 practical use scenarios Scenario 1: use in microcontroller based learning or machine learning projects that require precise motor control. Scenario 2: drive mechanisms such as air conditioning strip systems or camera monitoring direction adjustment setups. Scenario 3: prototyping or hobby projects that require a flexible stepper motor driver accessible to various MCU platforms (51/AVR/ARM).