用AVR单片机直接控制其步进电机，c语言写成，用mege8L的PB0-PB3连接步进电机的四个接线端！该步进电机的转矩很小，强烈建议不要将其从底座上拆下！！！否则没有轴承支撑，摩擦力太大，转不起来！-AVR with direct control of its single-chip stepper motor, c language, and PB0-PB3 of mege8L to connect the four stepper motor terminal! The small torque stepper motor, it is strongly recommended not to be removed from the base! ! ! Otherwise there is no bearing support, too much friction, does not turn up!