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基于PWM的LED灯模拟自然光强系统的设计

Keywords: LED,模拟自然光,单片机,PWM

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Abstract:

LED是一种具有高效节能、绿色环保、使用寿命长等优点的新型光源.本文所述的LED灯模拟自然光强系统,以AT89C51单片机为核心控制芯片,实现在阴雨天的昏暗早晨,利用LED灯补光以模拟最佳自然光强渐亮的效果,将有助于改善人们起床后的精神状态.系统采用PT4115大功率LED恒流驱动方案,可实现对LED灯的多级PWM调光控制.本文给出了系统的硬件与软件设计,并以自然光强变化的拟合曲线作为标准,对LED光亮进行控制.

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