Power USB wireless dongles


6 posts
by muad_dib » Tue Oct 30, 2012 1:05 am
I read that Raspberry PI is capable of powering 100 mA per port, while most dongles use much more than that.

I also read that many use wifi dongles without problems.

How's that possible? Everyone using external powered USB host?
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by SirLagz » Tue Oct 30, 2012 4:40 am
The newer Raspberry Pis don't have that limitation anymore.
The older ones did due to the polyfuses
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by rew » Tue Oct 30, 2012 4:17 pm
Plus, the cheap dongles do NOT use more than 100mA and work just fine on an unmodified 'pi V1.
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by Durazell » Sun Nov 04, 2012 9:07 am
SirLagz wrote:The newer Raspberry Pis don't have that limitation anymore.
The older ones did due to the polyfuses


Do you mean usb can output more than 100mA? I tried to connect samsung galaxy s III through usb, and it wasn't recognized at all (tailing and lsusb did not react at all)

EDIT: I'm using model B with 512mb RAM, with 1,2A 5V power supply (Nokia N900 charger)
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by SirLagz » Mon Nov 05, 2012 2:44 am
Did the phone start charging ?
Was the phone in debug mode ?
Have you activated the 'disk drive' mode of the phone ?
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by Durazell » Thu Nov 08, 2012 2:33 pm
SirLagz wrote:Did the phone start charging ?
Was the phone in debug mode ?
Have you activated the 'disk drive' mode of the phone ?


It was android phone. Phone didn't start to charge (although at first connect charging led flashed once) and i couldnt choose any of the modes because device was not recognized.
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