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Any european DIY DC-DC PSU guru's here?

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  • Any european DIY DC-DC PSU guru's here?

    Howdy,

    As the topic states, I'm curious if there is someone who can help me to build a DC-DC ATX power supply. As I live in Holland, I'd prefer a design with components widely available around here (Europe). This would make it a lot easier to get the right parts...

    I have some electronic skills; making/designing pcb's, soldering and so on, including SMD. I have no idea however how to design a switching PSU. So the design is the main issue.

    Anyone willing to help me/direct me to some info? Thanks in advance,

    Shaper

  • #2
    Gudday,
    Try www.sproggy.com ... he uses mainly data sheets for the max range of voltage regulators, and I can get all the parts in aussie so they can't be that hard to find. You can also try http://www.jarcom.com/inmotion/power.htm but this supply is not as good.
    Cheers,
    Fab

    Comment


    • #3
      I can agree with AussieGuy, try Sproggy's design. Im living in Denmark and had no problems of optaining the parts needed, the coils I got as free samples from Coilcraft Europe. And this circuit works really well.
      I've started building my second now, as the first was stolen from the car.

      Comment


      • #4
        Thanks for your replies!

        AussieGuy:
        I've checked Sproggy's design and I sure like it. I think it will not be difficult to make one myself... Getting the parts should not be a problem I guess.

        Max:
        I would like to know how to get those free samples... How did you do that?
        Too bad the first one got stolen. Makes me wonder if I should hide my mp3-player...

        Comment


        • #5
          Hi

          As i live in holland too, i thought i would have problems obtaining the right components for the PSU..

          As I cannot solder that good and i almost don't know anything about electronics, just computers, I have a friend who is putting the whole sproggy-psu-thing together at this moment.. (only thing is he takes weeks instead of hours).. And I didn't hear him about some problems obtaining the right components.. You should be ready for like 40-50 Dutch guilders ($20,-).

          One question for the elec.techies around us.

          I choose for sproggy's 2.5 (the one without the 3.3v for ATX-design)

          Would it be hard to convert the 5v into 3.3v on the board so i could still use this psu for a ATX-style motherboard ?


          ----------
          All those thoughts, ideas and components, and still no mp3-car-puter in my car
          ---------
          Greetzzz

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

          Comment


          • #6
            Raas,

            Converting from 5V to 3.3V is not difficult at all! Just replace IC2 with another maxim-ic (787->788), desolder pad1 and there you go! This is one of the things I like about the design!

            I will look if I can find all the parts and start building it. I'm a bit curious where your friend got his parts, since I live in Harderwijk. (10kms from Horst.)
            If he got them locally, please tell me where he got them, so I can get them there too.

            Maybe a joint effort can result in getting us _both_ a good PSU in a short time.

            Thanks,

            Shaper

            Comment


            • #7
              Shaper,

              That's another Horst in the Netherlands,
              The Horst where I live is Situated in the Norhern Part of Limburg (Between Venlo and Venray, so it's in the Southern part of Holland)

              I will ask my friend where he got all the parts from. He works at a electrical installation company, so it could be he ordered some stuff there.
              But I will definetly ask, and let you know where to get the components. (haven't spoken to him for a while now, also a good time to check the progress, as I gave him the scheme for over 3 months ago now and he has been working on it for the last month.. I don't mind he's not that fast, as I don't have the computer for my car ready, I'm not that impatient.. Besides, he has been very busy working for his boss.. I'm just waiting for the psu, and then move on with my project.. getting a good psu was my first concern 'cause i don't see the use of converting 12v to 220v to let the computer convert it back to stable 12+5v.)

              Groetjes


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

              Comment


              • #8
                Well, it looks like more Dutch people are trying to building the Sproggy power supply. I just looked at it this morning and it looks very nice. I haven't looked at what the components will cost. Maybe i will do that tomorrow when I'm in school not paying attention to the teacher. I think a good place to get the parts is at www.conrad.nl .
                This shop has everything you can dream off, well almost everything .
                But if there will be a joint effort by us "Hollanders" I'm interessed in joining up it. A good powersupply is a must, it will last longer than the other parts of the computer.



                ------------------
                I'm NOT insane, i'm just out-of-sync with reality.
                I'm NOT insane, i'm just out-of-sync with reality.

                Comment


                • #9
                  It really is amazing looking at websites written in another languagethan your native one...its amazing the information you can draw about whats written by simple context clues from words that are similar in your native language....

                  Catlas

                  P.S. Sorry for the meaningless post...I just like to share

                  Comment


                  • #10
                    I know what you mean, especially with Finnisch websites. I never learned the language but a lot of words look similar and by that I can understand the language.

                    ------------------
                    I'm NOT insane, i'm just out-of-sync with reality.
                    I'm NOT insane, i'm just out-of-sync with reality.

                    Comment


                    • #11
                      <font face="Verdana, Arial" size="2">Originally posted by Shaper:
                      Thanks for your replies!


                      Max:
                      I would like to know how to get those free samples... How did you do that?
                      Too bad the first one got stolen. Makes me wonder if I should hide my mp3-player...
                      </font>
                      I've just send an email to Coilcraft Europe, asking them to send the coils as free samples. 3 to 4 days later they arived in the post. You can find the email addr. at their website.

                      Comment


                      • #12
                        Max,

                        I tried to get the parts from CoilCraft, but I got a page explaining that I could not get free samples for constructing an mp3-player! (Apparently they check if a certain combination of products is selected...) I'll try sending an email and hope that will succeed...

                        Comment


                        • #14
                          Aaarrggghhh... It looks like the sproggy.com domain has expired! (I've whoissed it at netsol.com and they say it is available to register! Although registering it was impossible.)

                          Does anyone know when the site (if ever) will be up again?

                          [Edit]Yup, it works again... Must have been a hickup or so.[/Edit]

                          [This message has been edited by Shaper (edited 03-09-2001).]

                          Comment


                          • #15
                            www.sproggy.com still works for me. Maybe this link will help you: http://sproggy.mp3car.com/
                            sproggy.com just forwards you to the above link.
                            And for the Dutch people in this thread. Farnell, the company where sproggy got most of his parts, has also an office here in the Netherlands.



                            ------------------
                            I'm NOT insane, i'm just out-of-sync with reality.
                            I'm NOT insane, i'm just out-of-sync with reality.

                            Comment

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