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Thread: diNovo Mini™

  1. #61
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    Quote Originally Posted by nobb View Post
    I had some time today so I built a car charger out of parts I had laying around. I used the lm317 voltage regulator. Here is a good site for a tutorial on how to wire up this chip:

    http://web.archive.org/web/200705182...rial-full.html

    Vout = 1.25(1+R2/R1), so you need an R2/R1 = 5.4 to get Vout= 8v. Do do this, I used two 220 and one 100 ohm resistor in series to get 540. This is my R2. Then used a 100 ohm resistor as R1. R2/R1 = 540/100 = 5.4. I forgot what capacitors I used, but I used the largest caps I could fit in both the input (C1) and output (C2) just to help smooth out the voltage from ripples.

    The lm317 is bolted to a small heatsink, just incase.

    Pics are attached. Cant really see in the pics, but the dinovo mini is charging perfectly from the cigarette adapter.

    any chance you could build me one of those and charge me for it? or offer some really detailed directions?

  2. #62
    FLAC
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    I thought those instructions were fairly detailed already. Which part are you having trouble with? Parts you need:

    -cigarette adapter
    -lm317 chip + heatsink
    -two 220 ohm resistors
    -two 100 ohm resistors
    -two capacitors rated for 16v or above. As big of a capacitance as you can fit inside the adapter.
    -wire
    -barrel plug (not sure what size though...just whatever will fit in the mini. I took mine off an old nokia phone charger)

    Then follow the schematics in the link. Since it does take a fair bit of time for me to build, I think I would have to charge about $50 each shipped to the US/CAN. They dont exactly sell the lm317, capacitors and resistors single, I have to buy a whole bag. I could probably offer a better price if more people were interested in buying. But honestly, it would be best to build it yourself if you can.

  3. #63
    Variable Bitrate
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    Drew up a little sketch of the diagram using nobbs component values. The capacitors again can be higher.


  4. #64
    Constant Bitrate kibble's Avatar
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    May 2008
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    How long have you guys' battery been lasting? Last time I charged mine was about 3-4 months ago, I believe, and it's still working just fine! I don't use my keyboard much unless I have to enter in anything or if it's something I can't do with the touchscreen. I'm surprised it's lasted so long. I was thinking of making a car charger too, but at this rate, I don't see it being a huge necessity. I don't mind bringing it into the house every few months to get a charge.

  5. #65
    Variable Bitrate
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    Yeah I think you wouldn't use the keyboard that much, its not like you're gonna use a your carpc to write a letter or something...

  6. #66
    Low Bitrate Chamberlin's Avatar
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    Yea, same here, my has been on 'dead' for about 3 weeks now (keep forgetting to bring it in the house for a recharge), and I still have been using it, although sparingly... I am more worried about the long term effects of the heat (here in AZ) killing the poor battery's performance...if that is a factor...

  7. #67
    Maximum Bitrate MobiTekLink's Avatar
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    Well, I lost my charger and I'm not looking forward for it to drain.
    Although, I bought it 2 months ago and still running fine.
    I rarely use it but it's waayyyy cool just to use it and keep it in the seat pocket!
    08 Lincoln Navigator www.mobiteklink.com

  8. #68
    Maximum Bitrate LinuxRacr's Avatar
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    My battery is just lasting. After about a month, I just take it in to charge it, so I won't forget.
    My Car: 2001 Mazda MP3
    My OLD Carputer project: Here
    Completion Progress Bar: [**********100%]
    Current build! Here
    Completion Progress Bar: [*********99%]

  9. #69
    FLAC Dougw133's Avatar
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    Anyone get this working in the bios? The whole purpous of buying this for me was to get that ugly PS2 keyboard outta da car.

  10. #70
    Low Bitrate Chamberlin's Avatar
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    Quote Originally Posted by Dougw133 View Post
    Anyone get this working in the bios? The whole purpous of buying this for me was to get that ugly PS2 keyboard outta da car.
    I just keep a crappy rubber roll up PS/2 keyboard in the back storage part of the car just in case I need to get into the BIOS, other wise I don't think there is an easy way to use a bluetooth keyboard on boot....

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