What is polarity for an unmarked USB hub?

Posted by Feral Oink on Super User See other posts from Super User or by Feral Oink
Published on 2012-05-13T14:39:16Z Indexed on 2012/06/16 3:19 UTC
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power-supply

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usb-hub

On my USB hub where the power supply plugs in, the polarity is unmarked (I got it used, from my brother's friend). I need to know what the polarity should be.

I don't think it makes a difference about the brand. Could someone who has a USB hub tell me what the polarity markings are?

This is why I need to know about the polarity: Usually the center pin is positive and the outer pin is negative. But I'm not sure with this, and want to be certain before I plug anything into it.

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