Caliber Mengsk
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Portable Power Source.

Wed May 30, 2012 6:16 pm

Not sure if this is quite the right place for this, but I thought some people might find this useful.

I know many people are making projects that are using the small size of the pi as a forefront to their project. I don't have a pi to test with, but I would think something like this would be a good fit for those that want small, and portable.

http://www.amazon.com/Duracell-Powerhou ... d_cp_cps_0

Simple USB charging system for phones, but I would think it'd be great for the pi. I can't personally test it, as I don't have my pi yet, and I don't really have the money at the moment (car payment and rent coming up XD) to spend on it, but thought I'd throw it out there for people.

devindied
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Location: La Porte Texas / Los Angeles CA
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Re: Portable Power Source.

Fri Jun 01, 2012 5:20 am

Seems nice. I also don't have a Pi to test with yet, but it does put out 5 DC volts, so it should work. The unit does look a bit large though, so it would be the same size, if not, bigger than the Pi itself. Not saying that would be a problem but its just something to consider. You found it at a great price, it use to be 50 bucks. I found a review of it here: http://gizmodo.com/5350880/review-durac ... ty-perfect Also showing it a 50 bucks. You can also see it beside an iPhone for size comparison. When my board gets here, I'd like to have it powered via 4 AA rechargeable batteries in a housing like this: http://www3.towerhobbies.com/cgi-bin/wt ... LXXLR2&P=7 I have some laying around so i'd figure i would try it out. Since we are talking wireless, maybe we can complicate it more and try and have the first Pi wirelessly connected! (http://www.amazon.com/Powermat-2X-with- ... 931&sr=8-2)

Anyway, good luck on getting your Pi, I know I need some.... :(
Devin
Raspberyy Pi Model B (soon to get.... i hope.....)
2012 MacBook Pro 17 2.5 i7 Quad, 8GB Ram, 1GB GDDR5 GPU, 128GB Samsung 810 SSD
OSX 10.7 Lion / Windows 7 Ultimate / "Future linux"

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rurwin
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Re: Portable Power Source.

Fri Jun 01, 2012 6:21 am

It doesn't give a capacity, but it seems bout the same as a Droid, so 1300mAh. I'd guess that would give you 2-4 hours, which is as good as some laptops. Of course that does not include the screen.

Michael Meissner
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Re: Portable Power Source.

Fri Jun 01, 2012 11:56 pm

I bought a similar device (an EZOPower) from Amazon that is rated for 5000maH for $20 a few days ago, but I notice that todays price is almost $25. So if you are buying these type of devices, you might want to search around, and maybe give it a few days, as the price seems volatile.

I bought it specifically for my Arduino, but it will be good if I don't need a separate battery for the Raspberri PI.

Now, that I finally got the RPI order in, I have to figure out where to use it.

ITCSW
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Joined: Tue May 29, 2012 11:00 am

Re: Portable Power Source.

Thu Jun 07, 2012 4:56 pm

There are stacks of really cheap MP4 players on ebay, perfect for tinkering with your Pi as they have a small screen and a battery.........I will post as soon as I've started tinkering with mine which I got a few days ago. :D

OregonJim
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Joined: Wed Jan 04, 2012 5:13 pm

Re: Portable Power Source.

Thu Jun 07, 2012 10:37 pm

How about a 6v gel cel battery with a 5v 3-tab regulator? Maybe set up to be kept charged up via a small solar cell?

Also, what 32G SD card would you guys think is a good one to use?

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rurwin
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Re: Portable Power Source.

Thu Jun 07, 2012 10:38 pm

A normal linear regulator (7805) needs 7.5V to regulate to 5V.

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rew
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Re: Portable Power Source.

Sat Jun 09, 2012 5:45 pm

And at 1A the LM2986 only needs 1A.
http://www.ebay.com/itm/LM2596-DC-Step- ... 416655eb3b
(and I have one of those powering my 'pi right now, but not at the 1V dropout point, but with 12V input).
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