[clug] ATX r pi

[Rodney]

A USB hub to run 4 pi would need to supply > 5 A,  which I think highly 
unlikely.  

AFAIK, there is a way of powering a pi via the GPIO pins, but that is for 
someone knowing how to crimp headers & be certain to connect to the 5V instead 
of 12 V on the molex HDD connectors of an ATX PS.  You would still need one 
echidna board as a convenient way of firing the whole thing up.

Otherwise you would be faced with at least two USB power supplies of 2 or 3 
Amp plus four USB2micro-USB to power it all.  Might be the simplest solution 
anyway.

Either way you might also have a need for one powered hub to drive a USB 
interface to HDD etc.

Do your pi have Hynix RAM though ?


Rod

On Mon, 18 Nov 2013 12:00:06 linux-request at lists.samba.org wrote:
> Message: 6
> Date: Mon, 18 Nov 2013 10:16:06 +0000
> From: Logan McLintock <u4955237 at anu.edu.au>
> To: "linux at lists.samba.org" <linux at lists.samba.org>
> Subject: Re: [clug] ATX r pi
> Message-ID: <512CACC3-B98F-45B3-A3F4-6D95C36BCC54 at anu.edu.au>
> Content-Type: text/plain; charset="us-ascii"
> 
> 
> Wow, thank you so much for all the help guys! 
> 
> 1st - Yes (after researching) the power supply will want to run something of
> substance, some people run a car bulb just to keep it happy lol (that seems
> like extra heat to me) 2nd - Yes I think that a usb hub is a much more
> sensible choice (as opposed to an ATX power supply) - thank you for the
> suggestion 3rd - I wouldn't have checked the proper electricity
> requirements! - thanks - i will look for that hub at Bunnings =)
> 
> I just have two questions:
> * can I run multiple R pi's off the same hub (I have 4 of the model B's)?
> * And, if it is plugged into a hub, do you not need the micro usb power as
> well?
> 
> Regards,
> Logan