Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Thread: Schematic needed, DC to DC PSU

  1. #1
    North of the land of Hey Huns
    Auto Apps:loading...

    Join Date
    Jun 2004
    Location
    Westminster, MD
    Posts
    2,127

    Schematic needed, DC to DC PSU

    This is not what you may think it is, what I specifically need is a schematic so I can build something that takes 12vcd in from my car, and outputs + 12 +5 -5 -12 like a normal PSU.

    The reason this is all I need, is I have a mini-pc which came with an external converter, the only thing the PSU on the inside does is seperate the +/- 5/12vdc's into what the motherboard itself needs. So I dont need the whole shabang, just that small part, which is why I have been having problems finding anything on the forum for just that.
    "stop with the REINSTALLS, what do you think we got some lame-o installer!!!" - mitchjs
    RevFE
    My Shop

  2. #2
    FLAC
    Join Date
    Sep 2004
    Posts
    1,577
    That sounds like a really non-standard setup. You could be in trouble. You'll probably end up with a solution that gives you the ATX connector plug and then take the various wires you need from that to connect to the PC.

    So I dont need the whole shabang, just that small part, which is why I have been having problems finding anything on the forum for just that.
    There's nothing 'just' about that small part. That's what this entire forum is about. It's far from trivial to get those separate pieces.

    Are you sure your PC doesn't also need 3.3V?
    Progress: 80% - Permanent install left.
    Motion LS800 Tablet PC and dock.
    Vista, Bu-535 GPS, RoadRunner, MPT2006.

  3. #3
    Maximum Bitrate
    Join Date
    Nov 2004
    Location
    Cali
    Posts
    640
    Quote Originally Posted by Arathranar
    That sounds like a really non-standard setup. You could be in trouble. You'll probably end up with a solution that gives you the ATX connector plug and then take the various wires you need from that to connect to the PC.

    There's nothing 'just' about that small part. That's what this entire forum is about. It's far from trivial to get those separate pieces.

    Are you sure your PC doesn't also need 3.3V?
    It seemed to me that the whole thing is at the end a power supply just like an Opus. It would also help to have some power requirements for each rail and total...

  4. #4
    North of the land of Hey Huns
    Auto Apps:loading...

    Join Date
    Jun 2004
    Location
    Westminster, MD
    Posts
    2,127
    Well, the AC/DC converter unit outputs +- 12v and +- 5v (all dc)and has a ground, thats all that goes into the PC. I'd prefer to have 15a on the 12, and 7a on the 5, that'd leave me some leaway for adding more stuff. I've also been debating just buying a 300w DC to DC, as they dont cost all too much, but it'd be nice if I could do thoes for relativly cheap myself.
    "stop with the REINSTALLS, what do you think we got some lame-o installer!!!" - mitchjs
    RevFE
    My Shop

  5. #5
    Maximum Bitrate
    Join Date
    Nov 2004
    Location
    Cali
    Posts
    640
    Quote Originally Posted by malcom2073
    Well, the AC/DC converter unit outputs +- 12v and +- 5v (all dc)and has a ground, thats all that goes into the PC. I'd prefer to have 15a on the 12, and 7a on the 5, that'd leave me some leaway for adding more stuff. I've also been debating just buying a 300w DC to DC, as they dont cost all too much, but it'd be nice if I could do thoes for relativly cheap myself.
    I am even more confused here now. Why do you have an AC/DC converter in the car?

  6. #6
    Variable Bitrate FyreDaug's Avatar
    Join Date
    Jan 2005
    Location
    Saskatoon, SK
    Posts
    352
    You want to build your own power supply? I hope you know that computer parts are very picky about their voltages, when your engine revs up the voltage changes slightly, maybe even the slightest change can screw up components. I'm willing to bet you are overlooking some security purposes. But if not and you do know what you are doing, I apologize.

  7. #7
    Constant Bitrate strohmrs's Avatar
    Join Date
    Jun 2004
    Location
    Idaho
    Posts
    197
    Sounds to me like he has a mini computer with an AC/DC external power brick which supplies +12 and +5VDC to the computer and he would like to replace that with a DC/DC power supply that will output the same. Is this correct, malcolm?
    Rick S.

    XP Pro SP2, Soyo P4RC350 MB, Nvidia FX5200, 320W PS, Inverter & uSDC20D, 2.4GHz CeleronD320, 512MB DDR, 30GB 3.5", Pioneer 106s Slot DVD, Linksys WMP54G WiFi, Lilliput 7" & 4" TFT LCD, Zippy EL610 Keyboard, Touchpad, Garmin GPS V

  8. #8
    North of the land of Hey Huns
    Auto Apps:loading...

    Join Date
    Jun 2004
    Location
    Westminster, MD
    Posts
    2,127
    Correct. Except it also supplies the inverted voltages of the same.
    "stop with the REINSTALLS, what do you think we got some lame-o installer!!!" - mitchjs
    RevFE
    My Shop

  9. #9
    Maximum Bitrate
    Join Date
    Nov 2004
    Location
    Cali
    Posts
    640
    Then what's the problem of getting an Opus?

  10. #10
    North of the land of Hey Huns
    Auto Apps:loading...

    Join Date
    Jun 2004
    Location
    Westminster, MD
    Posts
    2,127
    Heard of all sorts of problems with them, and I'd really like to keep 300w's avalible to me.
    "stop with the REINSTALLS, what do you think we got some lame-o installer!!!" - mitchjs
    RevFE
    My Shop

Page 1 of 2 12 LastLast

Similar Threads

  1. Frequently Asked Questions
    By bgoodman in forum The FAQ Emporium
    Replies: 33
    Last Post: 05-03-2005, 06:25 PM
  2. DC pc pSU schematic. help
    By qdrw82 in forum Power Supplies
    Replies: 0
    Last Post: 11-07-2003, 09:55 AM
  3. WTB: touchscreen lcd, DC PSU, 98lite, HDD
    By guitar333 in forum Classified Archive
    Replies: 1
    Last Post: 07-17-2003, 01:25 PM
  4. What to look for in a PSU some info for you
    By cproaudio in forum Power Supplies
    Replies: 9
    Last Post: 04-04-2003, 01:07 AM
  5. wtb: harddrive, dc dc psu and slim slot dvd
    By kardas in forum Classified Archive
    Replies: 3
    Last Post: 05-21-2002, 05:11 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •