Power the Raspberry Pi over a powered USB Hub?

[senden9]

Hi!
Is it possible to power the Raspberry Pi over a powered USB Hub and use it as Hub at the same time?

[bursar]

Yup. Just run a cable from the hub to the poewr input on the Pi. Job's a carrot.

Some people have reported problems with certain hubs though, so have a check on the Wiki to see what's what.

[IanK]

Some powered USB hubs have an issue in that they backfeed 5v back into the host, power will then be fed into the pi via the micro usb connector and the usb socket.
see http://www.raspberrypi.org/phpBB3/viewt ... pi#p129416 for more details
I got around this by opening up the usb cable and disconnecting the +5v red wire, power is now only fed via the micro usb socket.

[Dilligaf]

Some powered USB hubs have an issue in that they backfeed 5v back into the host, power will then be fed into the pi via the micro usb connector and the usb socket.
see http://www.raspberrypi.org/phpBB3/viewt ... pi#p129416 for more details
I got around this by opening up the usb cable and disconnecting the +5v red wire, power is now only fed via the micro usb socket.

If you're powering the Pi by the same hub and disconnect power to the hub to power off the Pi then power backfeed is a non issue.

Mike

[CCitizenTO]

1) Standard USB Port delivers 5V @ 500mA of power (2.5 Watts)
2) By spec the Pi requires 700mA to function correctly 500mA will get the CPU running. Thus most people will want to use a USB Y cable so it can draw power from 2 ports so it'll receive the 700mA required.
3) Make sure you got a Hub that works well (check the wiki). Getting a hub that does nasty stuff like feeding current back to the Pi and stuff will cause it to not work properly.

[senden9]

OK. Thanks!