51单片机控制四相步进电机,单片机来控制此步进电机，则只需分别依次给四线一定时间的脉冲电流，电机便可连续转动起来。通过改变脉冲电流的时间间隔，就可以实现对转速的控制；通过改变给四线脉冲电流的顺序，则可实现对转向的控制。-51 single-chip four-phase stepper motor control, single-chip microcomputer to control the stepper motor, then were followed by only a certain period of time to the four-pulse current, motor rotation will be up for. By changing the pulse current time interval, we can realize the speed control　by changing to a four-order pulse current can be turned to achieve control.