![](https://i.imgur.com/iVGwLbj.jpg)
[請益] 2.1mm dc電源問題
![](https://i.imgur.com/iVGwLbj.jpg)
![](https://i.imgur.com/RNDzNPr.jpg)
問個蠢問題
小弟想要幫樹莓派另外拉個電源
於是買了個像這樣的母座
但是不知道哪支腳要接5v,哪支要接地
但是它有三支腳,不知道有沒有買錯QQ
拜託前輩幫忙解答一下
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