基于 51 单片机的旋转 LED 点阵显示屏设计与实现摘 要本设计是一个旋转式 LED 显示屏，它利用了视觉暂留原理，以 51 单片机为核心控制器件。LED 模块安装在稳定旋转地载体上，静止时，各列发光二极管等间距排列。当显示模块随着旋转体速度的加快并最终稳定下来后，在程序精确的控制下，由于视觉暂留效应，人眼就能够看到显现出预设的文字，字符等。红外收发二极管的作用是，当接收二极管随旋转显示屏转到发射二极管，两者对接时完成信号收发，引起单片机外部中断，单片机控制程序初始化。因装在电机上的控制电路始终在高速旋转，所以不方便使用电刷供电方法来给控制系统和显示模块供电。这里采纳通过高频线圈耦合（等同于变压器初次线圈耦合）供电。次级线圈耦合得到的是沟通电，还需通过整流二极管整流成直流电，供旋转模块使用。关键词：视觉暂留，直流电机，无线耦合输电，红外触发 THE DESIGN AND IMPLEMENTATION OF ROTATION LED DOT MATRIX DISPLAY SCREEN BASED ON 51 MCUABSTRACTThe design is a rotating LED screen based on the C51 MCU controlling and the visual persistence principle. Installing 16 LED (light-emitting device) on a rotating steadily device, each row of light-emitting devices spacing are lined up, along with the rotation speed and finally stabilized in the control of the microcontroller program, accurate, continuous rotation shows the text, characters , etc ,which is designed in advance.The function of a infrared diode is that when the receiving diode with the display screen rotating to the emitting diode, the process of signal’s receiving and transmitting is completed. There will be a interrupt leading to SCM controllable display program being restored to its original state. Though the main controlling circuit on the motor is rotating at a high speed, it’s not convenient with the brush contact to supply power to control system and display module. It can be done by high-frequency coil coupling (just like the transformer primary coil co...
