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arduino 供電

Sep 16th 2013, 13:12

知識問題|

發問者：	chungmin ( 初學者 5 級)
發問時間：	2013-09-16 21:12:59 ( 還有 4 天發問到期 )
解答贈點：	15 ( 共有 0 人贊助 )
回答：	0 意見： 0

我用arduino設3個輸出，在led上前2個亮度差不多，第3個led只有微亮，電壓測出來都是4.4v左右，想用來驅動繼電器，不過第3個輸出無法使繼電器動作，跟電流有關嗎?還是甚麼地方有問題，有甚麼方式可以解決?

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