Power consumption concerns with multiple boards

Hello,

I am planning on using BeagleBoard-xM's and BeagleBones as a part of a
system for building native ARM. This is obviously quite heavy activity
in terms of processor usage and power consumption and I am searching
for a working power solution for this and I am worried that a powered
USB hub won't provide enough power and I had some trouble finding
information on the power consumption rates (maximum).

Can anyone help me out here or at least point me to some direction
with finding a good powering solution to power 5-10 boards? I won't be
needing the USB separately so I'm not restricted to using alternative
power option - However, if I can refrain from getting separate power
sources for each board, that'd be peachy. I know that I could probably
use a separator with the alternative 5.5mm/2.1mm plugs as well, but
again, I have the same problem of not knowing whether they'd provide
enough power.

-Sami

Any chance you can let us know how many of each you plan to use and how they are connected? Overall in my mind, separate DC connections is the cleanest.

The BeagleBone will take more current if powered off USB than over the DC due to the FT3323 being active under the USB configuration. I am not sure if you need that or not.

Gerald

Any chance you can let us know how many of each you plan to use and how
they are connected? Overall in my mind, separate DC connections is the
cleanest.

At the moment, I am thinking something along the lines of 3 bones and
5 xMs. One bone would function as a master to provide some kind of
interface to the system and they'd all be connected to a switch
through the Ethernet port. 2 of the bones and the xMs would be
utilized for heavy duty computational tasks. I found some options into
powering them through the alternate power but I have no clue if it's
enough.

Getting one 5V DC power source and using a splitter to split it into 8
might result in there not being enough power (as I have no clue to how
much this would require). Having the box take 8 power sockets sounds
like an overkill since the cheap ones I found cost around 12€ (or
$16). For 8 boards, this would total 96€ + the box to connect them to,
so it does not sound like the most appealing option if others are
available.

To be a little more specific to my initial specification, I found
this:
http://www.securitycamera2000.com/products/DC-Female-5.5mm-to-8-Male-2.1mm-Power-Splitter-Cable-for-CCTV-Camera.html

What kind of power source would I need with this or is it even
possible with standard power supplies that can be bought at reasonable
prices?

Sami Anttila wrote:

Hello,

I am planning on using BeagleBoard-xM's and BeagleBones as a part of a
system for building native ARM. This is obviously quite heavy activity
in terms of processor usage and power consumption and I am searching
for a working power solution for this and I am worried that a powered
USB hub won't provide enough power and I had some trouble finding
information on the power consumption rates (maximum).

Can anyone help me out here or at least point me to some direction
with finding a good powering solution to power 5-10 boards? I won't be
needing the USB separately so I'm not restricted to using alternative
power option - However, if I can refrain from getting separate power
sources for each board, that'd be peachy. I know that I could probably
use a separator with the alternative 5.5mm/2.1mm plugs as well, but
again, I have the same problem of not knowing whether they'd provide
enough power.

http://www.ebay.com/itm/DC-5V-20A-Switching-Power-Supply-Transformer-Regulated-/160462539262