本设计以单片机PIC16F877A作为国旗的控制核心，总电路分为单片机控制模块、电机驱动模块、掉电检测和数据存储模块等部分组成。经单片机控制，通过数码管显示国旗所在高度、当前速度等丰富信息，并可由键盘控制国旗的位置、速度和升降方式。整个系统硬件电路简单，控制准确，功能完善，实用性强。-The design of a microcontroller PIC16F877A as the national flag of the control core, the total circuit is divided into single chip control module, motor drive modules, power failure detection and data storage module and other components. The MCU control, through the digital display where the height of the flag, the current speed of information-rich, and the national flag from the keyboard to control the position, speed and elevation ways. The system hardware circuit is simple, accurate control, functional, practical.