多路照明LED调光控制电路的设计与实现.PDF

?行业应用与交流 《自动化技术与应用》?? 年第 ? 卷第 ? 期 Industrial Applications and Communications 多路照明 LED 调光控制电路的设计与实现 殷? 威? 邢丽冬? 钱志余 ?南京航空航天大学自动化学院?江苏? 南京???? 摘? 要?目前?多路照明 ?? 正在被广泛的应用?但每个 ?? 都是配有一个单独的驱动源?为了能够控制多路 ?? 的配合工作?所以 进行了实验研究。实验采用的方法是?计算机给单片机发出调光信号?调光电路中通过 ??? 来进行多路选择?单片机产生 ?? 调节电流值?其中调光电路又采用了调解工作电流方式和脉宽调制方式两种方法。通过实验研究?阐述了多路调光控制 的原理?论证了两种调光方法的可行性?得出了整个电路输入输出关系?从而可以具体控制多路 ?? 的亮度。 关键词?照明 ?? 亮度调节??? 单片机?多路控制 中图分类号????? 文献标识码??? 文章编号????????????? The Design and Implementation of Multi-channel lighting LED Dimming Control Circuit YIN Wei, XING Li-dong, QIAN Zhi-yu ( College of Automation, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 China ) Abstract: Recently, multi-channel lighting is widely used , but each LED is equipped with a separate driver’s source. The method investigated to be able to control multi-channel LED is that the computer send the dimmer signal to MCU, and use CD4067 to realize multi-choice, MCU produce PWM to adjust the value of current in the dimmering circuit. Dimmer circuit uses two methods, one is adopted working current mode, and the other is pulse width modulation mode. Through the experimental study, expounds the principle of the multi-channel dimmer control, demonstrates the feasibility of the two dimmer method, obtaines input/output relationship of the whole circuit, thus can control multi-channel LED brightness specifically. Key words: lighting LED; brightness to adjust; PWM; MCU; multiple control ?? 引言