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Thread: About a power source

  1. #1
    Constant Bitrate SuperAJ's Avatar
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    About a power source

    I basically got everything down about my car mp3 player. It's blasting through a 133mhz, with 32 ram, but how do i power this computer through my car!? do i just plug it in the car lighter?! I doubt that little smoker switch can pump out 200 watts of power. Someone mentioned something about an inverter? I'm hoping someone can help me get some power into this thing. Thanks.

  2. #2
    Constant Bitrate
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    superaj, there are two ways you can do this. The first one, the one you mentioned, is with an inverter. An inverter converts your car's 12VDC to 110 or 220 volts DC, which you can plug your computer's AC power supply (which, ironically, converts the power back to DC) into. If you plan to use your player both in your car and elsewhere, then this is an option you might choose. Just plug your player's power supply (I assume you have a regular AC power supply) into the inverter, and hook the inverter up to your car power (the lighter). An inverter will run you anywhere from US$50-65 Your other option, which is better if you plan to have your player in your car most of the time, is to get a DC-DC power supply. This converts the 12VDC your car spits out to the +5, +12, and -12VDC your motherboard and drives need. You can get one for US$35 (or $25 if you want to assemble it yourself) at http://scott.kincaid.net/, as well as a couple other places (though that is the cheapest I've seen).

  3. #3
    Constant Bitrate
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    Oops. I meant to say an inverter converts 12VDC to 110 or 220 volts AC.

  4. #4
    Constant Bitrate SuperAJ's Avatar
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    People have talked about stripping their inverter wires. If i do strip it, where would the wires solder to? Into to cig lighter directly?

  5. #5
    Newbie
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    I believe this was discussed before, but the two wires going to the lighter plug are the +12VDC and the ground. The one soldered to the tip is the +12VDC and the one that goes to the prongs sticking out is the ground. I have my +12VDC going directly to the battery, but you can wire it to a switched accessory output (switched on and off depending which position the ignition is in) in the fuse panel, eliminating the need for another swicth. This is not recommened for equipment that draws a lot of current tho, so be careful. If it had a cigarette plug on the end tho, you should be fine.
    The ground can be crimped to a ring and screwed to any bare peice of metal on the frame. Mine's screwed down at the same point the grounds for my amp, headunit, and mp3player case are.

  6. #6
    Constant Bitrate SuperAJ's Avatar
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    I'm sorry, i'm new to all this technical munbo jumbo. Could you just tell me after i cut/strip the wire from the lighter plug, where i stick it for power? Thanks

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