说明：  全自动可遥控旗帜升降系统以AVR单片机为核心，由PWM对电机进行变频调速，高精度光电编码器测速，闭环式电路控制。能够利用按键输入相应的指令控制旗帜的升降，还可以实现在特定位置停留的功能。利用LCD可以显示旗帜的实时高度和相应的控制命令，用LED指示旗帜是否处于半旗状态，具有语音提示报警功能，并可利用无线模块实现遥控功能，准确均匀地实现旗帜的升降。
(Fully automatic remote control system to lift the banner of AVR microcontroller as the core, the PWM frequency of the motor speed, high-precision optical encoder speed, closed loop control circuit. Able to use the appropriate command control of key input flag down, you can realize the function in a specific location to stay. LCD can display the banner using real-time high and the corresponding control commands, use the LED is directed at half-mast the flag state of alarm with voice prompts, and can use the wireless module for remote control functions, to achieve uniform and accurate movements of the flag.)