最后，电压差的正负输出到电机驱动芯片决定电机的正反转。
Finally, the positive and negative output voltage difference to the motor driver chip motor positive decision.
控制系统的硬件电路部分主要包括控制器、传感器和电机驱动芯片。
Hardware circuit part of control system mainly includes controller, sensor, and motor driver chip.
详细说明： 用单片机控制步进电机驱动芯片：A3972，实现64细分。
MCU controlled stepper motor driver chips : A3972, achieving 64 segments.
应用推荐