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Thread: Anyone try a Forward Converter?

  1. #71
    Live and Kickin'
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    Wow, I just noticed this thread was actually from a few months ago

    I'm glad someone bumped it so I could see it

  2. #72
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    Alright! 4 posts in a row!

    Everything's been ordered from www.mouser.com

    Total cost was $13, and I ordered double everything in case I break something. I didn't get the resistors/capacitors yet, but I can get them for pennies locally.

    I'll let everyone know how it went in a week or so when everything shows up in the mail.

  3. #73
    Maximum Bitrate Raas's Avatar
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    Arby,

    Please take pictures and make notes...
    Then it's easy for others to do the same.

    Good luck and let us know !

    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. #74
    Bj
    Bj is online now
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    I've done this too. MKIII power supply is a front end modified PSU just like this, however, my first few sorta stuffed up due to a HF problem. My supply would squeal (duty cycle exceeded) and I couldn't pull it in enough. Replacing the core with a Toroidal made a huge difference.... I guess the core material of my other trani couldn't handle the frequency. Mine runs @ 35kHz now quite happily. Toroids go off!

    I'll have to take some pics of the PSU when I've finished moving house

    The way the secondary supplies 12+ and -12V is not the difference between the 24V supply, but done with separate windings. Because the windings are seperate (on mine they are) you simply use one winding to provide one voltage and reverse the diode on the other isolated winding for it to produce neq voltage. Because the frequency is so high, one diode is all that is needed to rectify the AC into DC. Then filter it with a ESR cap, and Viola!
    BjBlaster! Car MP3 & Carputer!
    bjblaster.com

    "The solution to one problem is only the beginning of another"

  5. #75
    Constant Bitrate
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    marsjell....the link at www.noduck.nl/mp3.htm is now broken. Would like to see this schematic...anyone know where it is posted or can they repost it. Thanks.

  6. #76
    Constant Bitrate
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    hey can anyone list the parts needed for this conversion?
    damn this thread is old.

  7. #77
    Constant Bitrate
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    Anyone know anything about this stuff? The thread is about 3 years old and all the links are dead. Still, if anyone does understand this stuff it could be VERY useful!

  8. #78
    Variable Bitrate
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    Exclamation

    grahamrb & dannn:
    I would be glad to be of service, check www.namms.tk
    Allthough I would advice you to simmply buy a morex dc-dc converter there pretty cheap, not as cheap as this forward converter but it saves you a lot of time trying to make sense of all that is written. True for about $35 bucks you have a rock solid dcdc converter, but the time and de aggony just isn't worth it anymore.. At the time this thread was started the cheapest dcdc converter was about $250~300, but now you have excellent converters starting at $60,- (in the netherlands check www.stanet.nl, search for carpower).

    I was great to do, but if mine breaks down I'm gonna buy one.
    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!!

  9. #79
    Low Bitrate
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    ok - so that site is also b0rked... anyone got a zipped copy that I can mirror?

  10. #80
    Variable Bitrate
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    what's b0rked? what does that mean?
    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!!

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