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Viewing 17 posts - 1 through 17 (of 17 total)
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  • 04/04/2015 at 06:43 #93712
    ShadowKnight
    Participant

    Ive recently been messing around with raspberry pi and its alot of fun. Its a bit big but with a 12000mAmp lithium battery, its pretty hard to keep small. I used the raspberry pi 2 on this project and I 3D printed the case in four parts. It took three months to complete on my spare time and its been a struggle every step of the way. There are many things I would have done differently yet regardless of it all, it works and its fun. :)

    04/04/2015 at 06:46 #93714
    ShadowKnight
    Participant

    Here are the guts of my creation.

    04/04/2015 at 07:15 #93719
    deepdivered
    Participant

    i am working on a portable rpi2 also. can you tell me how you powered yours and how long it lasts etc thanks.

    04/04/2015 at 08:59 #93726
    ShadowKnight
    Participant

    Well I used Adafruit’s PowerBoost 500 + Charger.
    https://learn.adafruit.com/adafruit-powerboost-500-plus-charger
    As far as how long the battery last, I dont really know. I just finished the project today and have yet to fully charge the battery and try it out. I am powering the hdmi screen, controller, audio amplifier and a fan all from the pi so all that will eat away my charge faster. I’ll charge it over night and try it out tomorrow to let you know. ^_^

    04/04/2015 at 23:30 #93803
    ShadowKnight
    Participant

    I didnt get to charge it completely but it lasted four hours straight. I was playing harvest moon for the 64 with the audio at full blast

    04/05/2015 at 03:15 #93814
    deepdivered
    Participant

    Awsome. For some reason I thought the power boost 500 could not produce 2a. Do you have a link to the battery you are ussing?

    04/05/2015 at 05:00 #93820
    ShadowKnight
    Participant

    I’ve been looking but I think the seller has been removed from ebay. Ebay no longer shows the battery in my history either… The closest battery I’ve found to mine is this one:
    http://www.ebay.com/itm/3-7V-10000-mAh-Polymer-Li-Lithium-cells-Lipo-For-GPS-PDA-DVD-Tablet-PC-156870-/111242005917?pt=LH_DefaultDomain_0&hash=item19e68a4d9d

    Hope this helps. Looking forward to seeing how your handheld turns out. :P

    04/05/2015 at 06:46 #93824
    deepdivered
    Participant

    ya thanks. ill keep looking for a good battery. so fare that seems the most challenging part is figuring out how to power it for a decent amount of time.

    04/05/2015 at 07:49 #93825
    deepdivered
    Participant

    is this the one you used or same type? http://www.ebay.com/itm/A-3-7V-12000mAh-LiPo-Li-Polymer-Rechargeable-Battery-for-Power-Bank-10-74-135mm-/321138832637?pt=LH_DefaultDomain_0&hash=item4ac55db4fd

    04/05/2015 at 10:21 #93828
    ShadowKnight
    Participant

    No I didnt use that type of battery. It just felt like it was a too good to be true type of lithium battery and it also does not have a protective circuit (also looks more difficult to solder). Mine was more similar to the one I linked. But who knows. Maybe it is a better battery. I’ll probably try it out on my next project.

    04/05/2015 at 12:12 #93830
    deepdivered
    Participant

    i keep looking at the data from the powerboost 500c and am i understanding wrong or does it max out at 1amp output? you said you have a raspberry pi 2 right. that take 2 – 2.5 amp right? what am i not understanding about that set up? does the powerboost 500c not max out at 1amp? i would think you would have to use the powerboost 1000?

    04/05/2015 at 16:00 #93842
    ShadowKnight
    Participant

    Lol, I got confused with the way they referenced the 1 amp one as well. Here, this is what they say about it:
    ” 2A internal switch (~2.5A peak limiting) means you can get 500mA+ from a 3.7V LiPoly/LiIon battery ”
    It can and does supply the 2 amps but charging the battery takes a while for me

    04/05/2015 at 22:31 #93897
    deepdivered
    Participant

    Awesome thanks. Ya that was so confusing how they put that. 2.5a peak is perfect!

    04/05/2015 at 22:40 #93898
    deepdivered
    Participant

    What clock settings and memory split are you running? Do you feel you need that fan? Do you have heat sinks on there also? What would you do different next time? What did you do for sound, did you get an amp etc. Thanks for all the answers. This is one of the biggest electronics projects I have taken on.

    04/07/2015 at 04:18 #94049
    ShadowKnight
    Participant

    Im using the 2.6 retropie image, clock setting is the raspberry pi 2 option, didnt change the memory split and I did use heat sinks. At first I only put two heat sinks but after I took a photo with a thermal camera, I added another at the top right. The fan is there to help move the heat out of the heat sink. This makes heat spread towards the rest of the raspberry pi, but at least the processor is a bit cooler…
    For sound, find an audio amplifier that is powered by 5v from usb. After finding one you like, the speakers depend on what your amplifier outputs.
    What I would do different would be my 3d printed design but thats a different story which involves warping…

    04/08/2015 at 22:05 #94222
    deepdivered
    Participant

    Been talking to an administrator at adafrute. Here is something to take into consideration for our rpi2 projects.

    “One point to note: the PowerBoost 500C charges at 500mA. It would take 20-30 hours to fully charge a 10,000mAh pack that way.”

    04/11/2015 at 07:04 #94478
    deepdivered
    Participant

    ok i decided on a battery. i am gonna cheat lol i gonna pick this up http://www.amazon.com/dp/B00MQSMEEE

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