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请问这个LED的限流电阻R8为什么这么大？ #111

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wherehazy opened this issue Aug 10, 2021 · 1 comment

wherehazy commented Aug 10, 2021

静态电流20mA的情况下，3.0V的分压，引脚输出电平不也就是3.3V吗，为啥要用这么大的限流电阻，一般不就几十欧姆吗？

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wherehazy commented Aug 23, 2021

解决了，原来是用的这个LED
这里买的https://item.taobao.com/item.htm?spm=a1z09.2.0.0.4f7d2e8dZxsMrT&id=591307353157&_u=n2qgj3d9a15e

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