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知道的说一下led数码管报价单谁有?_其他_设计456问答
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知道的说一下led数码管报价单谁有?

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知道的说一下led数码管报价单谁有?
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1个答案
数码管的主要参数不在于电压是多少V,你加220V或380V也能正常工作,关键是你要串入多大的电阻,可以算得出来,一般把电流控制在1~20MA间都可以,就看你需要多大的亮度了,然后用你加的电压除以该电流,就可以知道串多大的电阻了,不用谢