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Thread: Good designs for 12v to 19v/3.5A for powering laptops

  1. #1
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    Good designs for 12v to 19v/3.5A for powering laptops

    With ground loop and stuff.

    I have seen post adress this but nothing definite
    so it would be nice to get a straight answer...

    The schematics that does the job right...

    Thanks....

    ** here it is rewritten, heh **

  2. #2
    Low Bitrate MikeXP's Avatar
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    Heh, I never knew god designed methods for powering laptops :P
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  3. #3
    Maximum Bitrate
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    That would be one damn good design if god designed it.

  4. #4
    Raw Wave
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    stop taking the **** guys, I think he suffered enough.




    milika,

    I think you might be better off buying one :

    http://www.maplin.co.uk/products/mod...455&Products=1

    If you really want to design/build one yourself check out the WEBENCH from national semiconductor website :

    http://www.national.com/appinfo/webe...my_webench.cgi


    Good luck

  5. #5
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    There is not much choice,
    I can not buy on line, my country will not
    allow this. I can not fina an adapter in my country.
    And leaving the country to buy an adapter is a bit
    extreme, heh...

    So i will make it myself...


    Webench is nice, but i was thinking more in
    line of working/prowen designes that i would just
    copy/make... If there is any...

    Thanks a lot...

  6. #6
    Newbie m0r473n53's Avatar
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    Thumbs up

    Good Schematic
    Attached Images Attached Images

  7. #7
    Low Bitrate Flaring_Afro's Avatar
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    post #1: a 5 year bump. nice lol

  8. #8
    Constant Bitrate kibble's Avatar
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    Man, I just got a good lol, not just from the title, but the 5 year bump deal!
    Kids, don't play with too many knives! -Crack Stuntman

  9. #9
    Newbie CanuckMark's Avatar
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    Quote Originally Posted by m0r473n53 View Post
    Good Schematic
    I know this is an old post, but I wanted to provide some feedback on the circuit in this post (PDF). I have built it and it works very well. It is currently running a AAO and current conversion is very efficient, almost no heat whatsoever.

    The text isn't in english and the image quality is poor, but there is one error in the parts list: R9 and R10 are specified as 6.8 kohm where they should be 6.8 ohm, the schematic is correct. Otherwise it worked perfectly. Constant draw is 5A with 10A intermittent, and voltage is adjustable.

  10. #10
    FLAC PhilG's Avatar
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    CanuckMart, where did you get your components from and what was the total cost if you don't mind me asking? I might take a run at building this instead of shelling out 150 for a Carnetix. Thanks!

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