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Thread: inverter and p2140

  1. #1
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    inverter and p2140

    Before i return the P2140 is it posible to use both the inverter and p2140.

    so from the bettary it gonna go to p2140 then from it +12v it gonna go to the inverter and then to the powersupply you thinks its a good idia or not ?

    and would I be able to use the options of p2140 ?
    and how about the power when my comp on hibrante would it eat more power or not ??

    please help

  2. #2
    Variable Bitrate walstib's Avatar
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    I really don't think it would be to your advantage to go from the battery -> DC/DC regulator -> DC/AC inverter -> PSU (AC to DC).

    I guess you could still use the options on the p2140 for shutdown functions. Your PC uses NO power when hibernated.
    Carputer Project Status:
    0% - Mobo died on 2/17/08
    Check out the worklog for my '01 Pathfinder.

  3. #3
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    yeah i know, but does the inverter use power when the pc is in hibernated ?

    i mean like the fan of the inverter working so i guess it uses power ???

  4. #4
    FLAC
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    I think it depends on your inverter. Look in your manual. For my inverter, it says it only draw 8mA when no power is drawn and is on. But if your inverter's fan stays on even with no power draw, then your current draw is probably higher. You could always use a system of relays to turn your inverter off when your ACC is cut, and the computer is off.

  5. #5
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    i am sorry whats a system of relays ?

    do you think is a good idea to connect the inverter Fan to the p2140 so it will turn off on hibrernate or not. i wanna do it but i am not sure it may over heat the inverter ????

  6. #6
    FLAC
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    By a system of relays, I mean use relays to turn on the inverter when the engine is off, and turn the inverter off when the engine is off. However, you need more than one relay, because you also want the inverter to stay when the computer is on, regardless of whether the engine is on. Its hard to describe with words, but read this post:
    http://www.mp3car.com/vbulletin/powe...-inverter.html

  7. #7
    Variable Bitrate walstib's Avatar
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    Quote Originally Posted by russian_mafia View Post
    i mean like the fan of the inverter working so i guess it uses power ???
    Oh, I see. If you use the p2140 before the inverter, it could kill the power to the inverter after a preset time. So the inverter could be powered off the entire time the car is (minus the preset delay for PC hibernation/shutdown time).

    So:
    you start the car
    x seconds later, startup controller allows power to be passed to the inverter and on to the PC
    you turn the car off
    shutdown controller sends a signal to the PC to start shutdown or hibernation
    z seconds later, all power out of the 2140 is killed
    Carputer Project Status:
    0% - Mobo died on 2/17/08
    Check out the worklog for my '01 Pathfinder.

  8. #8
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    yes that what i am talking about Walstib + sometimes i use the pc when the car is not running and i always afraid that it will drain my battery and i will have to ask someone for juice.

    is there other stuff not the p2140 that can do the same thing (p2140 is expansive) ?

  9. #9
    Variable Bitrate walstib's Avatar
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    Yup.
    Startup/Shutdown controllers:
    http://store.mp3car.com/category_s/80.htm
    ATX Power Supplies with integrated Startup/Shutdown Controllers
    http://store.mp3car.com/category_s/22.htm

    etc...
    Carputer Project Status:
    0% - Mobo died on 2/17/08
    Check out the worklog for my '01 Pathfinder.

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