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Thread: Anyone try a Forward Converter?

  1. #51
    Maximum Bitrate
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    And whats the story with making money using other people designes?
    Thats what it sounds like if im reading it right!

    [ 08-22-2001: Message edited by: Fosgate ]

    [ 08-22-2001: Message edited by: Fosgate ]
    Fosgate

    System Comp V3 - In progress.
    Low power MB with C7 CPU, DC-DC PSU, car ECU link, USB TV, GPS, 7" TFT, Wireless, Voice.

  2. #52
    Maximum Bitrate Raas's Avatar
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    /me only wants a good-powerfull-power-supply
    Raas - The Netherlands
    ME: VIA epia m10000, lilliput 7', opus 150w, 80gb<br>
    GF: IBM Thinkpad 380, ext. 3.5 80gb, 40x4, PB-IR

  3. #53
    Maximum Bitrate Raas's Avatar
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    Originally posted by Fosgate:
    And whats the story with making money using other people designes?
    Thats what it sounds like if im reading it right!
    hmmm... i really don't think that's the issue here anymore..
    If presslab would want to make money out of this I don't think he would have posted some kind of a schematic and alot of posts on how to do this...
    It's different for Jeff....
    He's building power-supplies he wants to make money with (which isn't such a bad idea) and i think that's why we haven't seen any schematic of him, 'cause he wouldn't make any money then...

    I think PressLab's goal is not to make money out off this, but he's putting up one hell of an idea... (and not just an idea.. he got it working,... now the rest of us )

    Greetz
    Raas - The Netherlands
    ME: VIA epia m10000, lilliput 7', opus 150w, 80gb<br>
    GF: IBM Thinkpad 380, ext. 3.5 80gb, 40x4, PB-IR

  4. #54
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    Think I'l just start trying...
    wat I really don't get is what he means by this:

    . I counted the turns ratio and did some quick inductance calculations and I changed the secondary turns by a factor of 2. Meaning for each seconday turn that I unwound, I re-wound it with twice the turns. I also used a slightly smaller gauge wire but I doubled it up. Less eddy currents in the wire this way. I noted which windings were on which layers so as to rewind it in the same fashion.
    why rewind it? as I understand you take apart the transformer, en rewind it like the schematic says?
    anybody?
    If at first you don't succeed.........
    destroy all evidence you tried

    for info on t6369c LCD or Presslab's powersupply check:
    http://www.namms.tk <=updated!!

  5. #55
    Maximum Bitrate Raas's Avatar
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    marsjell

    When you begin doing this, make sure you write down everything in detail.. it helps solving mistakes (if you make them)
    And later on when the psu works it will be easier to put up a website

    Greetz
    Raas - The Netherlands
    ME: VIA epia m10000, lilliput 7', opus 150w, 80gb<br>
    GF: IBM Thinkpad 380, ext. 3.5 80gb, 40x4, PB-IR

  6. #56
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    I think I'll start this weekend, have to find someone to lend me a camera so that I can make a pic of everything I do, so that I can make a DIY-page that's like a comic
    If at first you don't succeed.........
    destroy all evidence you tried

    for info on t6369c LCD or Presslab's powersupply check:
    http://www.namms.tk <=updated!!

  7. #57
    FLAC
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    Talking

    Hurry up :MAD: i need to get my hands dirty again
    abcd-1
    Author of CobraI,II,III and now CobraIV.
    You can contact me on AOL instant messenger....nick is cenwesi or cenwesi3

  8. #58
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    Originally posted by Raas:
    <STRONG>

    hmmm... i really don't think that's the issue here anymore..
    If presslab would want to make money out of this I don't think he would have posted some kind of a schematic and alot of posts on how to do this...
    It's different for Jeff....
    He's building power-supplies he wants to make money with (which isn't such a bad idea) and i think that's why we haven't seen any schematic of him, 'cause he wouldn't make any money then...

    I think PressLab's goal is not to make money out off this, but he's putting up one hell of an idea... (and not just an idea.. he got it working,... now the rest of us )

    Greetz</STRONG>
    I wasnt talking about the PressLab...
    That guy is a legend for contributing to MP3Car comunity.

    My reply was regarding this post
    Posted by Charles Enwesi

    Same here, this is the only REASON i havent started on the next box for customers or what not. Someone (**cough**) PressLab, Jeff...needs to have a site, step by step for all we wannabe electronic guys on what to do, i just hope we don't get electricuted doing it though
    [ 08-22-2001: Message edited by: Fosgate ]
    Fosgate

    System Comp V3 - In progress.
    Low power MB with C7 CPU, DC-DC PSU, car ECU link, USB TV, GPS, 7" TFT, Wireless, Voice.

  9. #59
    Maximum Bitrate Raas's Avatar
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    Fosgate:

    Sorry I mis-interpreted your post..
    Will read more carefull in future.

    Greetz
    Raas - The Netherlands
    ME: VIA epia m10000, lilliput 7', opus 150w, 80gb<br>
    GF: IBM Thinkpad 380, ext. 3.5 80gb, 40x4, PB-IR

  10. #60
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    I noticed that some of you have some questions on how to build it. I say, give it a shot, and if you can't get it to work, then post some questions and I will try to answer them all. I have been very busy lately, and although a DIY web page would be great, I don't have the time right now. The tricky part is winding the transformer. So, taking pictures while unwinding the original will help you to wind your replacement. Also, count the number of turns that you unwound, and if the new one doesn't work, post that info in your questions. Also, do not hook your motherboard up the first time you test it. Hook the POWON signal to GND, coming out of the motherboard connector (for the ATX supplies), and test each voltage with a voltmeter to make sure that they are correct, and adjust the variable resistor until you get it right. If one voltage is right, but the others are wrong, then you have improperly wound the transformer. So go for it, and at the very least you will understand more about how power supplies work, and at the best you will have built your own working supply!


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