升压式恒流LED电路
R2,用来调duty(可调亮度),调duty时频不变,R9用秋调恒流值(可调亮度),改天借个相机拍个实物图,希望大家喜欢.有需要这个图的PSpice仿真文件的请同我说.
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这是555驱动波形
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