breakingu
Posts: 2
Joined: Sun Feb 24, 2013 8:20 am

Powered usb hub and power supply suggestions.

Mon Feb 25, 2013 2:57 am

Looking for these two components before attempting to get my hands on an R-Pi. No more than $40 on the set of components. I need an .7A or better cable because I plan on getting the model B. I need 4 slots or more on the hub.

proppaganda
Posts: 1
Joined: Thu Feb 14, 2013 7:46 pm

Re: Powered usb hub and power supply suggestions.

Mon Feb 25, 2013 8:58 pm

I picked this hub up on saturday. works good so far.

http://www.officemax.com/technology/com ... rod3960254

for power supply i just used an old ipod wall charger, works great.

Cheers.

Cloudcentric
Posts: 982
Joined: Fri Sep 14, 2012 9:13 am

Re: Powered usb hub and power supply suggestions.

Mon Feb 25, 2013 10:38 pm

http://www.newegg.com/Product/Product.a ... k=f5u234v1

The one I bought has a 5V 2.1 PSU so can power the Pi with a separate PSU as per this blog:

http://debianarmpi.blogspot.co.uk

"I am using the Belkin Hub to power the Pi as well have the USB Bluetooth and WiFi Dongles plugged in. The keyboard USB sender is plugged into the PI itself."
I know everything about nothing"

Mobius
Posts: 238
Joined: Thu Aug 30, 2012 1:07 am
Location: San Angelo, Texas USA

Re: Powered usb hub and power supply suggestions.

Tue Feb 26, 2013 12:33 am

Check out http://elinux.org/RPi_VerifiedPeripherals

Specific items mentioned here may not be available where you are located. You will want at least a 1000ma supply but be advised that not all USB wall supplies output within the acceptable range. Fortunately, most of them are close enough that the Pi input circuitry will clamp it to 5 volts. The polyfuse is supposed to open if the voltage exceeds 6 volts and there is a 5 volt zener diode that is supposed to limit the voltage. Some 7-port hubs do not work properly even if their 4-port version does (check the link above). Try to get a powered hub to offload some of the current requirements of the Pi. I found my power adapter at a thrift store and my 4-port hub is by Gear Head. Got it at a Walmart store but then I live in the states.

brianL
Posts: 1
Joined: Tue Feb 26, 2013 11:05 am

Re: Powered usb hub and power supply suggestions.

Tue Feb 26, 2013 11:32 am

I'm using one of these:
http://www.amazon.co.uk/NEWLink-Port-Se ... 094&sr=1-5

Seems OK. Only got a keyboard (Logitech Illuminated) and a mouse plugged in so far.

gelfling6
Posts: 23
Joined: Sat Dec 01, 2012 8:39 pm
Location: Canton, Connecticut, USA, Planet Earth, SOL-3, Milkyway Galaxy, 3rd star on the left...
Contact: Website

Re: Powered usb hub and power supply suggestions.

Thu Feb 28, 2013 11:34 pm

I have one I got a 7-port hub at Staples, (with their label) which came with a 3.0-Amp supply, and the 7-port Dynex (Best Buy) hub I modified slightly for the Pi. (soldered the wires for the power cable directly to the coaxial socket , It freed-up a whole USB port!) which came with a 3.6-Amp.

As long as you have a 1-Amp minimum supply, which the Pi seems to want (anything less, you seem to be losing voltage because of too much draw), you're fine, but it's the Pi, combined with anything else running via the USB, that's going to chew-up the amperage. (and yes, the Keyboard & mouse do!)

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mahjongg
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Re: Powered usb hub and power supply suggestions.

Thu Feb 28, 2013 11:56 pm

gelfling6 wrote:I have one I got a 7-port hub at Staples, (with their label) which came with a 3.0-Amp supply, and the 7-port Dynex (Best Buy) hub I modified slightly for the Pi. (soldered the wires for the power cable directly to the coaxial socket , It freed-up a whole USB port!) which came with a 3.6-Amp.

As long as you have a 1-Amp minimum supply, which the Pi seems to want (anything less, you seem to be losing voltage because of too much draw), you're fine, but it's the Pi, combined with anything else running via the USB, that's going to chew-up the amperage. (and yes, the Keyboard & mouse do!)
I'm not quite sure if its relevant in your case, but do be careful with alternative ways to power the PI, if you "backfeed" it, or use any power entry method other than the micro-USB input then you are effectively bypassing the PI's Polyfuse, which also means that if ever the overvoltage protection diode D17 triggers, and you power the PI with a PSU able to deliver much current that isn't itself fused, D17 will possibly go up in smoke (as its not protected by the fuse) and will cause a permanent short of the 5V supply!

Rodman101
Posts: 16
Joined: Tue Jun 11, 2013 10:55 pm

Re: Powered usb hub and power supply suggestions.

Thu Jun 20, 2013 4:59 pm

Mobius wrote:Check out http://elinux.org/RPi_VerifiedPeripherals

Specific items mentioned here may not be available where you are located. You will want at least a 1000ma supply but be advised that not all USB wall supplies output within the acceptable range. Fortunately, most of them are close enough that the Pi input circuitry will clamp it to 5 volts. The polyfuse is supposed to open if the voltage exceeds 6 volts and there is a 5 volt zener diode that is supposed to limit the voltage. Some 7-port hubs do not work properly even if their 4-port version does (check the link above). Try to get a powered hub to offload some of the current requirements of the Pi. I found my power adapter at a thrift store and my 4-port hub is by Gear Head. Got it at a Walmart store but then I live in the states.
I have the Gear Head 7 port powered USB which says gives some problems according to the website. I've noticed that the 4th and 5th ports won't communicate with the Pi unless the sources themselves are powered. For example, if I plug in a USB flash drive, it won't mount or be recognized on the Pi; but, if I use a powered Ext HDD, it mounts and reads just fine. Now, the same USB flash drive will mount and read just fine on the 6th and 7th ports just not the 4th and 5th.

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