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Thread: CarPC Diagram

  1. #1
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    CarPC Diagram

    Hello all,

    I have been lurking around the site for a while now, and have started planning my CarPC system. For my first post I thought I would share a little diagram I put together to see what you all think.






    Please give me your thoughts on my potential setup!

    Cheers.

  2. #2
    Variable Bitrate
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    Very nice diagram. I am just getting into car computers, so i can't say if there are any issues with the layout. Just thought I'd take the time to say the diagram is very nice looking. Gotta love Visio...

    P.S. I typed this reply while bored at work too... LOL
    ~Puff

    View my worklog... I dare you... http://www.mp3car.com/vbulletin/worklogs/77267-2003-audi-a4-worklog-puffs-ride.html

    Carputer Progress [||------------------] 10%

  3. #3
    MySQL Error scott_fx's Avatar
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    thats pretty slick, seeems pretty good except for the cap placement. actually if you havent' purchased the cap yet i wouldn't bother with it. If you already have one then i'd put it close to the sub amp and just let it worry about that.

    aslo you could possibly save some psu power by running the xenarc off of the cars 12-14.4v
    New System in progress:
    M10k
    Phaze TD1500 ~> Dynaudio MD130
    Phaze TD1500 ~> Seas g18rnx/p
    Zapco Ref 500.1 ~ 12" tc-9
    Behringer DCX2496 ~ Envision Electronics psu
    Transflective Xenarc

    My Car Pc Install
    My Boat Pc worklog

  4. #4
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    Thanks for the comments...

    I actually already a full audio setup (H/U, Amps, Cap, components, etc.), so I will just be integrating everything on the left side of the diagram.

    I was actually wondering the following: Since I already have the cap wired inline with the amps, will it effect the CarPC PSU? I ask because it would be pretty easy to run power/ground from the power/gnd distribution block already in place. My guess would be no, but I thought I would ask just to make sure.


    Cheers.

  5. #5
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    scott_fx: With regards to the Xenarc powered by the PSU vs. the battery directly, my thought was the it would be better to have regulated power running the screen. Would you agree, or do you think this is unnecessary?

  6. #6
    MySQL Error scott_fx's Avatar
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    it would be better unless you cant afford the extra juice from you psu. I notice a little 'roll' when the car isnt running (looks like a faint shadow line rollin up the screen..hardly noticable when you are used to it) Other then that, the xenarcs are designed to be able to run off of unregulated 12v with the cig. lighter adapter. I've been running mind with no problems for about a year now.

    I dont think the cap will have any affect on the psu. i think some people have created tank circuits with a cap in the past.
    New System in progress:
    M10k
    Phaze TD1500 ~> Dynaudio MD130
    Phaze TD1500 ~> Seas g18rnx/p
    Zapco Ref 500.1 ~ 12" tc-9
    Behringer DCX2496 ~ Envision Electronics psu
    Transflective Xenarc

    My Car Pc Install
    My Boat Pc worklog

  7. #7
    Maximum Bitrate d_sellers1's Avatar
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    IMHO, most people who retain the stock HU will not need the four channel amp since the HU itself provides the amplification for the speakers. When you get rid of the HU, the speakers will need the 4-ch amp to drive the speakers.

    The cap may or may not be needed for your system. It would depend on what your alternator can put out. If you start to notice you lights dimming when the bass hits then you may want to throw the cap in there. I don't think the cap would affect the PSU. The mono amp is going to have the highest power draw but really only when the bass hits. Even if you have a single 2- or 4-ga coming from the battery, going in to the cap, and then splitting the output to the two amps and PSU, I think everything would be okay.

    Derek
    Progress [||-------]
    View my Worklog to see some of my progress.
    Downgraded Progress - Starting with another car... 09/13/06

  8. #8
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    Quote Originally Posted by d_sellers1
    IMHO, most people who retain the stock HU will not need the four channel amp since the HU itself provides the amplification for the speakers. When you get rid of the HU, the speakers will need the 4-ch amp to drive the speakers.

    The cap may or may not be needed for your system. It would depend on what your alternator can put out. If you start to notice you lights dimming when the bass hits then you may want to throw the cap in there. I don't think the cap would affect the PSU. The mono amp is going to have the highest power draw but really only when the bass hits. Even if you have a single 2- or 4-ga coming from the battery, going in to the cap, and then splitting the output to the two amps and PSU, I think everything would be okay.

    Derek
    I haven't tried it yet, but I believe a cap will help prevent voltage drops when you start the car. So if you are having problems with the computer rebooting while cranking, a cap should help with that.

  9. #9
    Maximum Bitrate d_sellers1's Avatar
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    Quote Originally Posted by Optikal
    I haven't tried it yet, but I believe a cap will help prevent voltage drops when you start the car. So if you are having problems with the computer rebooting while cranking, a cap should help with that.
    Agreed, however, a good DC-DC PSU such as the OPUS should survive cranking. This would only come in to play if the system was running when you go to start the car (ie. at a gas station). The car will still crank but if the PSU cannot survive the car cranking then the system will be restarted due to the drop in voltage. Normal every day starting should not be affected by the voltage draw from the starter since the computer is already in an off/hibernate state.

    Derek
    Progress [||-------]
    View my Worklog to see some of my progress.
    Downgraded Progress - Starting with another car... 09/13/06

  10. #10
    MySQL Error scott_fx's Avatar
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    from what i read back in the day, a cap of that size is pretty much useless when trying to help survive cranking.
    New System in progress:
    M10k
    Phaze TD1500 ~> Dynaudio MD130
    Phaze TD1500 ~> Seas g18rnx/p
    Zapco Ref 500.1 ~ 12" tc-9
    Behringer DCX2496 ~ Envision Electronics psu
    Transflective Xenarc

    My Car Pc Install
    My Boat Pc worklog

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