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12vdc to 19vdc Invertor ?

Discussion in 'Electronic Basics' started by Colin Lowe, Oct 22, 2003.

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  1. Colin Lowe

    Colin Lowe Guest

    Hi all,
    I want to make a convertor to step up the voltage from 12vdc to 19vdc to
    power my laptop. The mains adaptor I have for the laptop is rated 19vdc and
    3.16A. Thefore I want to step-up the voltage from the 12vdc boat supply to
    19vdc with a capacity of 3.16A max current.
    Do you have a circuit or what other options do I have?

    Thanks
    Colin
     
  2. Caution! Your laptop is going to be the test for your project. Check the
    manufacturer for a 12v adaptor. I know sometimes they are expensive, but how
    much would it cost to replace your laptop?

    Mike M
     
  3. the Wiz

    the Wiz Guest

    What if it was available ready-made for under US$30?

    Universal DC laptop adapter on eBay for US$26.24 (Buy It Now):
    http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3436683110&category=31575

    I have one of these that works OK with a Compaq Presario 900 series laptop.

    A Google search with the following terms
    laptop power adapter 19 volt auto
    should find what you want.

    www.powerstream.com has adapters specific to your laptop model for US$80.


    More about me: http://www.jecarter.com/
    VB3/VB6/NSBasic Palm/C/PowerBasic source code: http://www.jecarter.com/programs.html
    Drivers for Pablo graphics tablet and JamCam cameras: http://home.earthlink.net/~mwbt/
    johnecarter [email protected] mindspring dot.dot com. Fix the obvious to reply by email.
     
  4. Baphomet

    Baphomet Guest

    Excellent point.
     
  5. Anders

    Anders Guest

    Hello
    I have made 3 DC/DC converters for a car or boat with no trubble at all.
    Just connect to National web and webench and specify your needs. It will
    sugest a circuit and you can print the chematic and make a termo test. It is
    a fantastic web sight.

    Anders
     
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