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Thread: Regulated or unregulated 12V for my display?

  1. #1
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    Regulated or unregulated 12V for my display?

    How many of you are running your displays with unregulated 12V? I'm guessing most screens work just fine unregulated, but... that's just a guess...

    -momanz

  2. #2
    Constant Bitrate StationRocket's Avatar
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    i can't speak for all displays but i know many of them are designed to opperate off your car's normal 12v range. I have successfully ran a Xenarc off my car's unregulated 12V

    That being said some have had noise issues where there is sone alternator related noise in the image. Using a regulator or just running the display off the 12v rail from your pc power supply will filter it out.

  3. #3
    Constant Bitrate mpfjr's Avatar
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    Well if you take the 12 volt car charger type plugin apart you'll notice that aside a resistor for the led light, there is nothing else inside to regulate the power.
    Thus, the regulator is built into the display. I am going to run my power through a filter just to clean it up a little but I am not regulating it.

  4. #4
    Constant Bitrate strohmrs's Avatar
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    mpfjr, That isn't true for all displays. If you input unregulated 12V into a display that doesn't have a built in regulator you are feeding it about 14.5V with the engine running. That's a good way to kill a backlight or any other sensitive electronics in a hurry.
    Rick S.

    XP Pro SP2, Soyo P4RC350 MB, Nvidia FX5200, 320W PS, Inverter & uSDC20D, 2.4GHz CeleronD320, 512MB DDR, 30GB 3.5", Pioneer 106s Slot DVD, Linksys WMP54G WiFi, Lilliput 7" & 4" TFT LCD, Zippy EL610 Keyboard, Touchpad, Garmin GPS V

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    Hmmm. The box spec on my display claims an operating range of 11-24 volts... so I'm guessing I'm ok. I'll be ready to do my initial testing this weekend so we'll see how it works out. BTW I have a starvision sp-7vga. Not the best display I've read about, but it was cheap and yes a bit of an impulse buy too.

    -momanz

  6. #6
    Raw Wave EsKALad's Avatar
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    i have a lilliput 8 inch that when i wire str8 to the 12v with or without egg it flickers. i tried using the ac adapter and it works fine. but my problem is now i have to use a small inverter to plug the ac adaptor into. i dont want to do that. any suggestions? im looking for a regulator i seen the carnetix. but isnt that too much unnecessary power for just 1 screen? and input would be great!!

  7. #7
    Constant Bitrate StationRocket's Avatar
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    you could try one of these

    http://www.partsexpress.com/pe/showd...number=265-030

    or is that what you meant by "egg"

  8. #8
    Maximum Bitrate DeltaFX's Avatar
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    Eskalad, why don't you power your screen from a molex 12v ?

  9. #9
    Maximum Bitrate VanMan69's Avatar
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    Xenarcs are marked 11-24V. I've been running mine unregulated.
    95 Chevy G20 Vroom Boom Room
    ...with a whole bunch of nifty ****... go check it out: VanDomain Page

  10. #10
    Raw Wave EsKALad's Avatar
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    delta how would i go about doing that? wiring from the molex? which wires? can u draw me out a diagram?

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