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Thread: What do you think of my power system?

  1. #1
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    What do you think of my power system?


    Well, I'm new to the whole car pc thing, but I know a little about computers, and a little about cars, and a little about electronics, and I don't have a lot of cash. Now let me explain, I will have a killswitch in the dash so that nothing external drains the battery when I get out of the car.
    The computer will stay on until I turn it off, that means that if I just get out for a few minutes I don't have to reboot the computer.
    I will also have a soft power button in the dash so I can start the computer when I get in the car, or I can turn it off by pressing it. (windows reacts to this)

    I'm trying to keep everything simple since I have an old car, and just when I'm planning this my clutch went out. Anyway, it's very basic, any problems at all?

  2. #2
    Unregistered User ODYSSEY's Avatar
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    Some inverters don't survive crank without a tank circuit. Otherwise your simple setup should be fine. You could go DC-DC.
    ODYSSEY

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  3. #3
    Variable Bitrate BIzFlawless's Avatar
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    Smile


  4. #4
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    So if I get a power inverter that survives crank I could be fine? What should I look for then?
    Should I spend money on a good inverter or adding a tank circuit or putting in a opus psu?

    Which one would be the cheapest/best for the long run?

  5. #5
    MySQL Error MatrixPC's Avatar
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    Quote Originally Posted by TheRevoltingX
    Which one would be the cheapest/best for the long run?
    Either Opus 150W or DSATX 220W.
    2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
    89 Supra Turbo P3 600E@750/Abit BE6 II, Alpine M-BUS Car2PC.
    Y2K Accord Dell GX150
    RoadRunner is the best FE PERIOD
    EmoRebellion is a SCAMMER

  6. #6
    Variable Bitrate billmee's Avatar
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    Have you thought about a second battery?
    I am using sealed lead acid batt in the trunk to keep things going after I shut down the car. I get 90-120 minutes to transfer podcasts or what ever.

    I'm using an inverter ( $40 from overstock.com ) and found a couple advantages to a dc-dc.
    1) cheap and easy to find
    2) audible alarm if batt voltage goes down to 9.5v
    3) built in power switch
    4) blows up my aerobed when camping

  7. #7
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    Yeah I have thought about that, how big will this second battery need to be?
    What I think I'll do is leave it like it is without a tank circuit and add one later when I have some more money.
    I'm just going to make a it a bit modular.
    How much would putting in a second battery run me?

  8. #8
    Variable Bitrate billmee's Avatar
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    $40 from a local electonic surplus shop.
    It is a Zeus 7.2ah, lots on ebay right now.

    You must Isolate this battery if you need advice I'll post my circuit.
    So far I have a few months without problems.

  9. #9
    Variable Bitrate billmee's Avatar
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    oh yeah,
    my pc draws 6-7 amps.

  10. #10
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    Thanks, I'll see if I need the tank circuit, the inverter I got claims to survive crank.
    I have one question right now though. I need to get a 4 gauge wire to run directly to the battery, but since I need to run it through a switch that only take a smaller wire, how do I go ahead and convert it? I don't know much about the linguo.

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