[TriEmbed] Backup Power for Raspberry Pi 2

[Rodney Radford]

Power the RPi via the micro-USB plug from an external phone battery charger
like this one:

http://www.amazon.com/EasyAcc%C2%AE-Portable-External-Motorola-Smartphone/dp/B00JFTCCB2/ref=sr_1_6?ie=UTF8&qid=1436973362&sr=8-6&keywords=5000+mah+portable+phone+battery

There are many different sizes of those, with different features and
different power capabilities, but the nice part about this is you can
always keep it on the charger, so your RPi is powered through it, and if
you lose AC power, it will still run.

I used a 5000mah one of these to run an RPi, external web camera, arduino,
and a couple I2C sensors in a balloon for over 5 hours.  Depending on what
load you have, your mileage may vary, but I typically consider 1000mah is
equivalent to one hour of use.

Another great feature of this is your RPi can now be portable to carry with
you to a meeting to show off something without having to plug it in.

On Wed, Jul 15, 2015 at 10:59 AM, Carl Nobile via TriEmbed <
triembed at triembed.org> wrote:

> Dwight,
>
> Both John's and Glen's suggestions will work, but as Glen suggested you'll
> need a regulated supply between the power supplies and the RPi 2 to bring
> the voltage down to 5V. The RPi can not be run on more that 5VDC or expect
> to see smoke from the RPi
>
> Carl
>
>
> On Wed, Jul 15, 2015 at 10:52 AM, Glen Smith via TriEmbed <
> triembed at triembed.org> wrote:
>
>> Dwight,
>>
>> I have a spare small (ish) ups that came with an old AT&T network modem.
>> It outputs 12vdc, so it's higher than what you need, off the top of my head
>> I don't know what the max input voltage is on the Pi. A DC to DC converter
>> will bring it down to where you want it though.
>> I kept it planning to do something like this myself, but 2 years in I
>> still am just moving it around.
>>
>> Glen
>>
>> On Wed, Jul 15, 2015, 10:13 AM Dwight Morgan via TriEmbed <
>> triembed at triembed.org> wrote:
>>
>>> Hi All:
>>>
>>>
>>>
>>> I need a backup power supply for my Raspberry Pi 2. I don’t think I need
>>> something as large as those made for PCs. I think one more in line with
>>> that D cell powered one in my alarm clock or a little larger would work
>>> fine.
>>>
>>>
>>>
>>> Anybody know how to make one or if there is one out there already?
>>> Feedback appreciated!
>>>
>>>
>>>
>>> Thanks!
>>>
>>>
>>>
>>> Dwight
>>>
>>>
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>>>
>>
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>>
>>
>
>
> --
>
> -------------------------------------------------------------------------------
> Carl J. Nobile (Software Engineer)
> carl.nobile at gmail.com
>
> -------------------------------------------------------------------------------
>
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