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Mastero MK-4.5 250w 12v DC-DC ATX PSU + SDC

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  • Mastero MK-4.5 250w 12v DC-DC ATX PSU + SDC

    Hello Friends.

    MK-4.5 is comming soon....

    Specification:~

    Input

    8vdc ~ 30vdc (Can survive a Diesel motor start)

    Output

    +5vdc @ 12A (max)

    +3.3vdc @ 12A (max)

    +12vdc @ 10A (max)

    +5vstby @ 5A (max)

    -5v @ 500MA (max)

    -12v @ 500MA (max)

    PCB Size: 170mm x 110mm (wont fit standard atx psu case)

    Built in shut down controller.

    Shall post details soon..

    Cheers
    Mastero

  • #2
    Sounds interesting. Keep up the good work!
    2004 4runner

    Comment


    • #3
      250 watts sound impressive. Do you know what the cost might be?
      Installed
      Asus A7N8X-VM - AMD Mobile Athlon 2400
      512 Ram - 60GB HD - Opus 150w
      Lilliput 7" - Rikaline 6010
      [00000000000001100010-] 98% Completed

      Check Out My Install!!!

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      • #4
        Dam 250W that is impressive good work
        2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
        89 Supra Turbo P3 [email protected]/Abit BE6 II, Alpine M-BUS Car2PC.
        Y2K Accord Dell GX150
        RoadRunner is the best FE PERIOD
        EmoRebellion is a SCAMMER

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        • #5
          Mastero,
          Just wondering if you had any updates on the MK-4.5
          Installed
          Asus A7N8X-VM - AMD Mobile Athlon 2400
          512 Ram - 60GB HD - Opus 150w
          Lilliput 7" - Rikaline 6010
          [00000000000001100010-] 98% Completed

          Check Out My Install!!!

          Comment


          • #6
            Is this gonna be another brute force attempt?

            By the time you get to a 400W supply the heatsink will need to be about 1 ft x 1ft

            Comment


            • #7
              Originally posted by MrPerfectionest
              Is this gonna be another brute force attempt?

              By the time you get to a 400W supply the heatsink will need to be about 1 ft x 1ft
              No there will not be a 400w supply ....

              It shall be a while before testing....about a week or two...

              Mastero

              Comment


              • #8
                Thanks for the update. I'm just wating to buy a power supply ans a gps receiver before I start the installation.
                Installed
                Asus A7N8X-VM - AMD Mobile Athlon 2400
                512 Ram - 60GB HD - Opus 150w
                Lilliput 7" - Rikaline 6010
                [00000000000001100010-] 98% Completed

                Check Out My Install!!!

                Comment


                • #9
                  Wow, nice specifications, how is the shutdown controller going to work? will it be PIC based? also, how will this be avaliable? thru a kit or just schematic?
                  Keep up the good work!
                  CarComputer Status: New Car & Broken (Motherboard Fried)
                  Owen JH | My Linux Blog | The Tech Fellows

                  Comment


                  • #10
                    Mastero, just a suggestion for the next PSU.
                    Can you add another component to the PSU that can send a pulse to turn on the PC. Right now we depend on the mobo that "Resume on power loss" for turn on. Most mobos have that option but there are some mobos don't have that option.
                    I found the circuit from the12volt.com that use a relay, cap and resistor for constant to pulse.


                    - Output of the Sproggy relay connect to Pin 86 on image (relay coil +).
                    - Ground connect to the cap and resistor then to Pin 85 on image (relay coil -) .
                    - 2 terminal of the ATX power sw can be connected to pin 87 and 30 on image (SPST-NO) pin of the relay.

                    I tested that circuit on my mobo and it work very well.
                    2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
                    89 Supra Turbo P3 [email protected]/Abit BE6 II, Alpine M-BUS Car2PC.
                    Y2K Accord Dell GX150
                    RoadRunner is the best FE PERIOD
                    EmoRebellion is a SCAMMER

                    Comment


                    • #11
                      Matrix i know this cuircut .... i have also tried it works great.

                      Let me see if i can add a startup also ...

                      Mastero

                      Comment


                      • #12
                        Cool, it's always good to see you considering more features Mastero. You the man!

                        BTW, if you use the ignition/ACC signal for the switched +12v lead then wont this circuit send a pulse every time the key is switch from off to on (even if the computer is already on)? Suppose you have a large shutdown delay to keep your pc running during stops at a gas station. When jump back in and restart your car, your computer is going to receive a pulse and start to shut down, isn't it?
                        2004 4runner

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                        • #13
                          How much heat is that PSU going to dissipate?
                          Renault Megane...the OEM look

                          The Lost in Europe Ford Escort

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                          • #14
                            Rando, that is true. Everytime you have the IGN/ACC line come hot the circuit send a pulse. That is why on the bottom of my previous post I stated that the (+) to the relay coil is connect to the Sproggy relay output.
                            Now this got me think more that could also be wrong since the Sproggy relay won't turn on until the power button is "pushed".
                            The correct place to connect to is the the relay where the output is going to the 5V standby regulator (base on MK4.0) The SDC circuit switch on the relay (STBY Relay) to put the PSU in standby mode thru a 5V regulator chip. The output of the (STBY relay) can connect to the (+) coil of this "power on" relay.
                            Ok now it should work.
                            2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
                            89 Supra Turbo P3 [email protected]/Abit BE6 II, Alpine M-BUS Car2PC.
                            Y2K Accord Dell GX150
                            RoadRunner is the best FE PERIOD
                            EmoRebellion is a SCAMMER

                            Comment


                            • #15
                              Oops, I didn't notice the latter part of your post. With the changes you posted, it makes sense now. Also, it seems like you might be able to ditch the relay in favor of a much smaller and cheaper switching transistor. Small, cheap, powerful and efficient ... it's going to get there!
                              2004 4runner

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