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Thread: Powering Lilliput 7" 619GL-70NP via 12v

  1. #1
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    Powering Lilliput 7" 619GL-70NP via 12v

    Hi everyone,

    i've recently acquired a Lilliput 7" VGA Touchscreen 619GL-70NP but it has no power supply, AC or DC, whats the best way to power this directly from the cars 12v DC? can this be wired directly into the cigarette lighter?

    i've looked on the sticky above but dose not mention the Lilliput 7" VGA Touchscreen 619GL-70NP.


    Thanks,

  2. #2
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    I wouldnt power a lilliput straight from the car, they are not designed to take unregulated power. It would probably work though, but better to be safe and power it off the psu's 12v.

  3. #3
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    Quote Originally Posted by nobb View Post
    I wouldnt power a lilliput straight from the car, they are not designed to take unregulated power. It would probably work though, but better to be safe and power it off the psu's 12v.
    my thoughts, the system dose not have a regulator as it's a laptop.

  4. #4
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    If you have no other option, you could always tap into the 12v and ground rail of the pc's power supply and run them to the lilliput.

    nevermind, didn't read the above post completely. Contact the mp3car.com store and see if you can purchase one.

  5. #5
    FLAC
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    The product page from the manufacture says it takes 11-13 volts. Powering it directly from the lighter should be fine. In the pictures it also comes with a lighter adapter which appears to have no regulator in it to further prove this. It is generally a good idea to use a regulator though. If you're willing to do some soldering, you could probably get a regulated 12 volts out of the laptop, I really don't think it's necessary though.
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    i really would prefer to go regulated, rather then un. would this work?
    http://cgi.ebay.co.uk/LM317-DC-In-5-...item518fd92be8

  7. #7
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    Quote Originally Posted by dannyb13 View Post
    i really would prefer to go regulated, rather then un. would this work?
    http://cgi.ebay.co.uk/LM317-DC-In-5-...item518fd92be8
    Yeah, that should work. I say should because you'll be pushing that regulator to it's limit with the screen's power requirements.

    Honestly, the screen will work just fine for a long time without a regulator. So try it first and see if the problem is eliminated and then worry about regulating it if that is actually the solution.
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  8. #8
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    You should get a switch mode regulator, not a linear one such as the LM317 based units. The reason is, the linear regulators work best when the input voltage is a bit higher than the output voltage. If you are trying to regulate 13-14V to 12V it wont work as well as if the input voltage was something like 20V.

  9. #9
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    Do NOT power the lilliput directly off the cars power.

    There have been many horror stories about these units failing because of unregulated power, even when used with the supplied lead, which does have a (very poor) regulator in the 'egg'.

    Get a 12V regulated supply.

  10. #10
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    The "egg" is not even a regulator (atleast not on mine). It's just an inductor and a capacitor to smooth out the voltage.

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