Incompatible Self-Powered Hub

Hi Morgaine,

Thanks and may I say, England ROCKS!!!   I loved the Olympic openings.  This is the third time the world has been blessed to have England preside over this event.

I'm guessing that although a powered hub will not end my Pi power problems it might be beneficial to have one if I want to power additional peripherals like wifi and bluetooth adapters.

Any peripheral recommendations such chargers, self-powered hubs, or wifi and bluetoothadapters are appreciated.

Thanks

David

Unfortunately the only item of those that I can recommend from personal experience is Maplin's 1A USB charger --- http://www.maplin.co.uk/micro-usb-power-supply-393067 --- but even that will be of no use to you because they've gone out of stock.  I guess I shouldn't have mentioned in these forums that Maplin advertises it as Pi-compatible and that it works fine.

I haven't tried wifi nor Bluetooth with Pi, and the only self-powered hub I've tried with Pi fails with it, as I reported.

actually all the peripherals that do work (and those that don't) are listed here

http://elinux.org/RPi_VerifiedPeripherals

As for chargers, Nokia's AC-10E seems to be favorable according to some thread I can't find now, 5V and 1200mA. Beware of Chinese fakes though, especially on ebay and amazon.

I've changed the subject line to more directly match the topic of this split-off thread.

Why would you power your RPi from a hub that is only designed to give a max current output 500mA?  This is asking for trouble.

Just buy another power supply for the RPi.

You failed to understand what was written.  Read it again.

Hello David, from personal experience I can recommend the HTC chargers (as long as they are genuine) - 5v & 1.2A supply, works well for me.

I have bought, but not tried yet, this charger from Amazon: http://www.amazon.co.uk/gp/product/B0073JB4QU/ref=oh_details_o03_s00_i00 altough you need the additional lead which adds to the price, and it has also risen in price since I bought it.

Re Wireless, I have found the following from Amazon great, and very cheap: http://www.amazon.co.uk/gp/product/B003BKBGF4/ref=oh_details_o04_s00_i00 I have two and they work well in both Squeeze and RaspBMC.

Steve

This thread has nothing to do with USB chargers nor with supplying power to the Pi's micro-USB port.  David's question is over in that other thread -- http://www.element14.com/community/thread/19258?tstart=0 .

If replying over there ends up over here (because this thread was split off from that one) then that's a forum bug.

Fergus Byrne wrote:

 

Why would you power your RPi from a hub that is only designed to give a max current output 500mA?  This is asking for trouble.

 

Just buy another power supply for the RPi.

It's pretty hard to tell what a given hub was designed to do without taking it apart.  My Inland 4-port with upstream cable connects its 5V external power jack to all downstream ports directly, so all the 5V current could go to a single downstream port, limited only by PCB traces and iffy 3.5mm barrel connection.

The advantage of powering RasPi from a hub is convenience -- you don't need an extra wall wart, and you don't have to worry about a powered hub erroneously trying to power RasPi through the hub's upstream port.

I'm not sure it's the RPi design that's wrong, more that USB hubs are not always very careful about where their power goes. For instance... I have a Logik LP4HUB10. But, it sends power through the hub-Pi cable (just like Morgaine's problem) and I had to follow instructions http://www.raspberrypi.org/phpBB3/viewtopic.php?f=28&t=8926 here that meant taking apart the hub, snipping a wire and putting it back together again.

I guess the only thing the Pi could do is to prevent incoming power into the two USB ports... But then again why should it - power going through the wrong wire in a hub is a power drain, surely?