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How is the power supply connected?

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  • How is the power supply connected?

    I'm sure this has been covered, but couldn't find a thread to clarify this. If I have a DC-DC converter, is it wired directly to the battery, like an amplifier? Or does it only need to be wired to a wire switched by the ignition, like a head unit?

    Thanks in advance.

    Brian
    2004 Toyota Corolla S
    EPIA V8000A, 3.25GB & 60GB laptop drives, Lilliput 7" touchscreen, 200W and ITPS
    Currently running WinXP, MediaEngine, & iGuidance

  • #2
    The Opus for instance has three input wires. One for ground, one to the battery+ and one for the ingition switch.

    Tom
    VIA EPIA M9000/120 GB/Xenarc 700TSV/Opus 90W DC-DC
    Haicom GPS/3Com 11g Wi-Fi/D-Link BT
    WinXP/myHTPC/InfoMap Navigator Eu/PhoneControl w/T68i
    Blaupunkt HU & speakers/Velocity active subs/Alpine amps

    Progress: removed while waiting for nano-itx

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    • #3
      It is like a head unit which, by the way, is not just on a switched wire but also has a constant 12v wire, how do you think it keeps time when you turn your car off?

      Comment


      • #4
        Good point. I knew that, actually, I wasn't thinking about it though. I've installed head units in my cars before, and I remember that there is a ground, +12V constant, and +12V switched.

        I have another question regarding a power supply I ran across on eBay. Has anyone used this power supply and have any opinions, good or bad regarding it.

        http://www.short-circuit.com/DC2DC/
        2004 Toyota Corolla S
        EPIA V8000A, 3.25GB & 60GB laptop drives, Lilliput 7" touchscreen, 200W and ITPS
        Currently running WinXP, MediaEngine, & iGuidance

        Comment


        • #5
          I've never heard of that power supply.

          If you're getting a case with a 60W DC-DC supply inside it (Travla C134, Morex cases etc), then seriously consider the Carnetix CNX-P1260, which I own, and would not go without (unless i needed more power, in which case I would only ever swap it for an Opus)


          Garry
          Co-Developer of A.I.M.E.E
          www.aimee.cc

          Comment


          • #6
            Originally posted by Confused
            I've never heard of that power supply.

            If you're getting a case with a 60W DC-DC supply inside it (Travla C134, Morex cases etc), then seriously consider the Carnetix CNX-P1260, which I own, and would not go without (unless i needed more power, in which case I would only ever swap it for an Opus)

            Garry
            Can you use the Opus both if you have the Travla case and as a separate complete solution? Is it "overkill" to have the Opus with a Travla case?

            Is it possible to use ONLY the Carnetix solution or ONLY the Opus as power supply for f.ex. the Epia MII?

            Plans + status:
            + Ford Galaxy 2001
            + 7" GAIN (Xenarc) screen
            + 2,5" 40 GB Samsung drive
            + slot-load DVD/CDRW
            + USB WiFi
            - mainboard (Epia SP?)
            - housing (home made?)
            - power supply (Opus 90W/150W)
            - USB GPS + USB card-reader

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            • #7
              Originally posted by BriCubz
              Good point. I knew that, actually, I wasn't thinking about it though. I've installed head units in my cars before, and I remember that there is a ground, +12V constant, and +12V switched.

              I have another question regarding a power supply I ran across on eBay. Has anyone used this power supply and have any opinions, good or bad regarding it.

              http://www.short-circuit.com/DC2DC/
              I have a bad opinion about it. Notice on the specification page where it says N/A in the column for regulation against the 12V. That's because it doesn't regulate. 144 Watts of the rated 200W is passed straight through. I can make you a 1000W power supply, it's called a piece of wire. Stay well clear of this power supply and others like it, be very careful about the specs.
              Old Systems retired due to new car
              New system at design/prototype stage on BeagleBoard.

              Comment


              • #8
                i think this http://www.short-circuit.com/DC2DC/ is a bit like this http://www.mini-itx.com/store/?c=10#p500
                MG ZR CARPUTER (UNITED KINGDOM)

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                • #9
                  BriCubz,

                  As Rob says, be very careful about specs. Unfortunately, some people play games with their specs. But it's no laughing matter when you find it does not provide the power you expected.
                  MikeH

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                  • #10
                    I almost soiled myself when I read that.
                    Originally posted by MikeH
                    But it's no laughing matter when you find it does not provide the power you expected.

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