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Thread: My idea for powering carpc off wall at home (cheaply!)

  1. #11
    Maximum Bitrate Ruffy's Avatar
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    another option is to mount the harddrive in a removable caddy like the Vantec EZ Swap. Buy two of them

    Place one in your desktop computer, and one in the carpc. Want to work on the carpc? yank the harddrive out, very easy/quick to do. Go inside, pop it in your computer and add whatever you want to it.
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  2. #12
    Fusion Brain Creator 2k1Toaster's Avatar
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    Quote Originally Posted by Ruffy View Post
    another option is to mount the harddrive in a removable caddy like the Vantec EZ Swap. Buy two of them

    Place one in your desktop computer, and one in the carpc. Want to work on the carpc? yank the harddrive out, very easy/quick to do. Go inside, pop it in your computer and add whatever you want to it.
    except for installing things which rely on certain files being placed in the windows directories. Even if you say install to this folder, the nuts and bolts of the program is going to go in the current windows directy, ie not the carPC.
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  3. #13
    FLAC SnyperBob's Avatar
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    I think the easiest and cheapest solution, provided you already own the hardware, would be to just config your machine via remote desktop thru wireless iNet.

    I'm not sure if your carpc has wireless Inet, along with your home, and you're in range where you park your car.

    But if so, leave your carpc on, activate remote desktop. Go into the house, connect to the carpc on your desktop in your house via wireless inet. You can transfer files and do just about anything you can do sitting at the pc from inside your house. When you're done, just shut down the carpc remotely.

    No need to spend more money or hook up anything. Then again, if this is not possible, then ah well...

    There's sync programs that allow you to auto shutdown the PC once completed too
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  4. #14
    FLAC
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    Hmm...I really do like Viper's idea and I might try it out if I have time. However, I really do want a high current voltage supply which can charge my batteries if I need. The remote desktop or external drive ideas really are not an option, because sometimes I might perform various types of tasks which would require the computer to be on overnight, or long hours (such as defrag).

    Just to give you guys an update, I was bored yesterday and I have sucessfully managed to get 15 volts by hooking up 3 PSU's together. I powered a 50 watt automotive light bulb. The PSU's are rated at 30 amps on the 5 volt rails, so in total I can theoretically get 15 x 30 = 450 watts! Now if I decide to pursue this further, I would need to drop the voltage to a safe ~13.8. I am ALSO happy to say that I realized that switch mode power supplies have high current diodes. I actually ripped open one yesterday to obtain a 60 amp diode for my tank circuit (another story). Since I have 30+ PSU's laying around, I might try to get some diodes to drop that 15 volts.

  5. #15
    Newbie v1per's Avatar
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    That should work. My idea only works for the PC alone and not the whole car.

    I like the relay idea, but it would be much, much more expensive than simply using a DPDT and flipping it when you need the AC power. Also, I guess I didn't say it but I meant to put the PSU in the trunk (that is what I plan to do, put the PSU in the trunk with an extension cord under the carpet with the spare tire).

    As far as remote desktop, that doesn't really solve the problem. He wants to be able to leave the computer on for long periods of time. That said, you could use remote desktop for this type of maintenance, but you would still need an AC->DC power supply.

    I really, desperately need to make a setup like this, but I need some money first...
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  6. #16
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    Not COMPLETELY the same thing, but does anyone know of a way to plug the car's electrical system into the wall, so you can use everything without draining your battery? (while the car is off obviously, the alternator would save it otherwise).
    Would one of those on-board battery chargers do the trick?

  7. #17
    Fusion Brain Creator 2k1Toaster's Avatar
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    I think one of those battery chargers with a "maintainer" circuit should do the trick as long as you aren't drawing too much current. I think a small via board should be fine, but no big systems because obviously it can't put out as much current as an alternator because that is not what they are designed to do.
    Fusion Brain Version 6 Released!
    1.9in x 2.9in -- 47mm x 73mm
    30 Digital Outputs -- Directly drive a relay
    15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
    Buy now in the MP3Car.com Store

  8. #18
    Constant Bitrate
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    Would probably work. Can't imagine I'd be drawing too much, only testing things here and there while installing/maintaining/repairing things (not just carpc related, but all aftermarket electrics).
    Just wanted a way to use the car's electrics without wasting precious fuel
    Was going for a solution where I could just plug the car into the wall, hence I suggested an on-board charger.

  9. #19
    Fusion Brain Creator 2k1Toaster's Avatar
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    I know what you mean about fuel. Although I did leave my car on idle while installing/updating my 2nd version of my carPC, from about 11pm to 6am! Barely used any gas at all. I had a full tank and my needle only went down 1 needle width. Still a waste, but wanted to be sure!

    You could build it into your car. If you put that charger in the trunk and run cables to the battery or something, then just plug in your car because the charger would already be in there!

    I would beware of the cheap trickle chargers, because those jus send the same current all the time and don't care about the current state of the battery.
    Fusion Brain Version 6 Released!
    1.9in x 2.9in -- 47mm x 73mm
    30 Digital Outputs -- Directly drive a relay
    15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
    Buy now in the MP3Car.com Store

  10. #20
    Constant Bitrate
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    So, what I'm after is a on-board charger with a "maintainer" circuit?
    (Just double checking)

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