整流器電壓問題請教:－愛爾麗醫美診所, lamour醫美診所, 八千代醫美診所, 千代田醫美診所, 光澤皮膚醫美診所, 醫美診所推薦

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整流器電壓問題請教

Sep 10th 2013, 17:22

各位好~

因為小弟想把一個電腦用風扇另作其他散熱用途，該風扇是5cm X 5cm DC12V 0.30A 如圖：

按這裡檢視圖片

於是找了一個很久以前的整流器，輸出是 DC9V 500mA：

按這裡檢視圖片

小弟直接將頭剪掉接線上去可以轉，用9V速度變慢點但可接受，但想請教整流器輸出是500mA，風扇是0.30A(300mA)，這樣會有問題嗎?(試轉1小時候整流器微熱而已)

然後這顆整流器的電線上面有一顆圓圓重重的東西，請教這是做什麼用的?

按這裡檢視圖片

最後小弟又翻箱倒櫃找到另一顆整流器輸出是DC4.5V-12.5V，MAX 700mA，上面沒有變壓開關可以調整，請問它是自動偵測嗎?例如當接上去的東西是吃12V的，它就會用12V去供電嗎? 另外也是請問700mA用在我的300mA的風扇上會不會有問題呢?

按這裡檢視圖片

以上先感謝各位的不吝賜教，感恩~~

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