说明：  单片机控制步进电机，：步进电动机由于其性能优越、控制精度高，被广泛应用于数控机床，绘图仪，自动化仪表及机械模型 等。而单片计算机是最常用的微控制器。介绍两种应用于单片计算机控制系统的步进电机驱动电路。
(Single-chip stepper motor control,: stepper motor because of its superior performance, control and high precision, are widely used in CNC machine tools, plotter, automated instrumentation and mechanical model. The single-chip computer is the most commonly used microcontrollers. Introduction of two single-chip computer control system applied to the stepper motor drive circuit.)