摘要
普通LED显示屏存在着LED数量多、成本高的不足,LED旋转显示屏能很好地解决此问题。系统以STC12C5A32AD为核心,用光敏电阻进行环境亮度检测,根据环境亮度自动调整LED的显示亮度;用PWM对显示电压进行控制实现亮度调节;利用光电反射进行起点位置检测;利用电感互感原理实现主控板对电机的启动、停止控制。经测试,系统能显示大小变化的同心圆、显示"TI杯"字符,显示"秒针"图像,看到的显示内容效果跟平面连续显示效果一样,效果良好。
Ordinary LED screem have many LED, the cost is very high. LED rotating screen is well resolving this issue, the system uses STC12C5A32AD as the main controller, ambient brightness detected photoresistor, according to the ambient brightness LED screen automatically adjust brightness; and the brightness can be adjusted by PWM which can control the display voltage; the photoelectric reflex starting position detection; Inductance mutual inductance principle to achieve the main board of the motor start and stop control. Test, the system can display the size of the change in the concentric circles, ＂TI Cup＂ character, ＂second hand＂ image. The effect is as well as the display of the plane continuous display.
出处
《微型机与应用》
2013年第3期82-84,共3页
Microcomputer & Its Applications
