摘要
目前,多路照明LED正在被广泛的应用,但每个LED都是配有一个单独的驱动源,为了能够控制多路LED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CD4067来进行多路选择,单片机产生PWM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LED的亮度。
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 controi, demonstrates the feasibility of the two dimmer method, obtaines input/output relationship of the whole circuit, thus can control multi-channel LED brightness specifically.
出处
《自动化技术与应用》
2011年第8期95-97,109,共4页
Techniques of Automation and Applications
