DIY iPod touch Chrager

Discussion in 'iPod touch' started by NobleRooster, Jan 2, 2009.

  1. NobleRooster

    NobleRooster New Member

    Dec 30, 2008
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    2G iPod touch
    Hey guys (and gals), I was looking into making myself a DIY charger for my iPod touch. Basically the constraints are going to be that it uses either a 12VDC source (such as a cig. lighter in a car) or 4AA batteries. I've made one of these before for my 1st Gen. Nano, and it worked more as a extra battery rather than a charger.

    So, I have a couple questions.
    -Does anyone know what voltage and current the USB connector has to be running on in order to be charging? I know standard USB output voltage is +/- 5VDC, but I've read that the hardware that is connected via USB tells what should be the current, so if I knew what the current needed for the touch to charge, then I could use appropriate resistors to cut down the current from my source.

    -Has anyone else had any experience making one of these DIY chargers for the touch or iPhone? If so, I might need a little bit of a goto person to ask a simple question I might run into.

    I'll try to keep this thread updated with status, schematics, etc. when I get deeper into the build and design.

    Also, if this thread has been posted in the wrong area (I didn't see a mods section, aside from the jailbreak section), please feel free to move it to the appropriate place.

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  2. we215

    we215 New Member

    Jan 6, 2009
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    me too...

    I also am trying to build an ipod touch charger. Actually it is built but to me seems flawed but I will get to that in a minute.

    At site they say that for the newer ipods to charge, besides pins 23 and 16 needing the +/- 5v, pins 27 and 25 need to be tied together with a 10k ohm resistor.

    I am using a battery pack with 4 rechargeable, 1000ma batteries, which give a output current of 4x1.2V or 4.8V.

    When I wired it all up and attached the charger, mind you this is all wired to directly to an ipod dock connector NOT a female USB receptacle, it says it IS charging but it seems to me to DRAIN, not charge, the battery. Weird huh?

    Anyway, As I work on it I will also post here. It may be my recently purchased rechargeable batteries, which I am using in the battery pack, are just duds and I need to get another set.

    Have you made any progress on this???

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