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  • For the lazyboy or novice...

    ...the newcomer, newbie, etc.

    Is there a ready-to-go DC-DC PSU available to purchase? With warranty, etc. I've been searching around with no luck, as I'm not really sure what to search for.

    For starters I'm in Australia, though even examples of products available overseas would be good so I have a starting point.

    Previously I was thinking of going the inverter way, but I'd rather explore the DC-DC option.

    The PSU would preferably be ATX. Though any physical size differences would be a small issue.

  • #2
    If you searched more carefully you probably would have come up with these names: arise, pc power and cooling, keypower. Among others. And there is definitely a currently active thread about a 100-150w commercial psu option.
    aka Kumaneko
    "Don't make me moderate your ***!"
    Maxima of Doom - project thread - photo gallery
    mp3car system is currently FUBAR and finances do not allow for a correction of that situation
    Real computer hackers use a rotary cutting tool on their motherboard.

    Comment


    • #3
      As I said I wasn't really sure what to search for. Not all search engines accept terms such as "DC PSU" because of the small amount of letters and the common occurance of DC and PSU...

      But thanks for the names all the same.

      After a while I eventually tracked one down available here in Australia.

      http://www.zantech.com.au/zantech/dx250h.html

      This model seems to be available in a fair few other places around the world and has been mentioned in these forums in a couple of (unsuccessful?) group buys.

      The price in the stores is AUD$330 (inc tax, free au delivery) which is about USD$180.

      Are these supplies still good by comparison? I probably won't be using 250w but it sure does look like a professional product and seems to fit all the needs of an atx mobo.

      Don't really plan on getting it for a while yet, still gotta build and configure my jukebox outside of the car first, but if anyone can gimme a reason to not to get this psu when the time comes...

      Comment


      • #4
        Originally posted by rawhide
        But thanks for the names all the same.

        After a while I eventually tracked one down available here in Australia.

        http://www.zantech.com.au/zantech/dx250h.html

        This model seems to be available in a fair few other places around the world and has been mentioned in these forums in a couple of (unsuccessful?) group buys.

        The price in the stores is AUD$330 (inc tax, free au delivery) which is about USD$180.

        That thing is huge!

        I've just ordered one of these:

        http://www.pcpowerandcooling.com/pro...line_12Vps.htm

        Add USD$35 for freight. Email their international sales address([email protected]), and mark the email to the attention of Tiffany - super helpful.

        C!
        http://carpc.riposte.net
        I reserve all rights in connection to each post I author, without exception.

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        • #5
          Not bad :P

          I suspect the reason for the zantech one being a bit bigger might be because it's got over twice the output. But as I said I probably wouldn't use all that... who would? Unless you're planning on running a p4 with geforce 4 in your car... *cough*

          Thanks for the link... do you mind me asking how you came across it? It's cool to find a few suitable power supplies but I'd like to know how people are actually coming across these

          Though not really sure if it's worth a saving of $30 when I can get the zantech one locally (and when I'm planning on using a regular atx case anyway).

          Comment


          • #6
            Stop the presses! So I have a C3 VIA EPIA 800 MHZ coming to me that uses DC power.

            With this power supply would you tie it diretly into the cars eletrical system? Won't this power my MOBO?

            Maybe my search for power has come to an end?

            Greg

            Comment


            • #7
              Yeah that's usually the point of dc-dc power supplies. With a fuse ofcourse...

              Comment


              • #8
                Originally posted by rawhide
                Not bad :P

                I suspect the reason for the zantech one being a bit bigger might be because it's got over twice the output. But as I said I probably wouldn't use all that... who would? Unless you're planning on running a p4 with geforce 4 in your car... *cough*

                Thanks for the link... do you mind me asking how you came across it? It's cool to find a few suitable power supplies but I'd like to know how people are actually coming across these

                Though not really sure if it's worth a saving of $30 when I can get the zantech one locally (and when I'm planning on using a regular atx case anyway).
                How did I find it? I'm a researchaholic, and there were links to their website here on the boards anyway.

                I can't afford the space required by the zantech. I want my machine to be small, and this is the smallest that I could find that had a warranty. There are custom build things here that are smaller, but they are more expensive, and have no warranty, which I have since decieded is important to me.

                C!
                http://carpc.riposte.net
                I reserve all rights in connection to each post I author, without exception.

                Comment


                • #9
                  Originally posted by gfoulks
                  Stop the presses! So I have a C3 VIA EPIA 800 MHZ coming to me that uses DC power.

                  With this power supply would you tie it diretly into the cars eletrical system? Won't this power my MOBO?

                  Maybe my search for power has come to an end?

                  Greg
                  You can't just run wires from the battery to that DC PSU. It needs a regulated, relatively high current supply. The full DC-DC ATX supplies don't have enough current on the 12V, since they're powering the other voltages too. Look for all the "12V, 5A supply" posts...

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                  • #10
                    I'm so confused.

                    Does such a thing exist? I would like to buy a Power supply that takes it's power directly from the car's electrical system and have it power a ATX board and accessories.

                    Totally Confused and Lost
                    Greg

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                    • #11
                      What about this power supply?

                      http://www.opussolutions.info/sfx.htm

                      Greg

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                      • #12
                        They also have cases that are built for the car!

                        Mobile-PC
                        OPUS Solutions Mobile-PC is designed specifically for ATX motherboards to be used in an automotive
                        environment. This Product brings a new dimension to your PC’s mobility. Just get in your vehicle and
                        start the engine; your PC is ready to go. When you switch off the ignition the PC can go into shut
                        down, standby or hibernate modes automatically, no switch to fiddle or fuss.
                        The Mobile-PC can accommodate a full ATX motherboard. The Mobile-PC can enjoy a wide selection of
                        hardware and software that are available for a PC platform. Thus, the Mobil-PC is an ideal choice for a
                        fully expandable computer at a reasonable system cost. The system can be upgraded, when required,
                        without loosing all the initial investment, unlike laptops.
                        The Mobile-PC is constructed with a heavy gauge aluminum sheet metal. The case is ruggedly built to
                        with stand the shock and vibration that are encountered in a tough mobile environment. The case is
                        designed with easy accessibility to I/Os, cables and CD/ DVD ROM Drive or removable Hard Drive.
                        The I/O connectors and cables are covered to protect it from accidental damage. The Mobile-PC has a
                        security lock to prevent unauthorized access inside the unit. The hard drive is protected from shock
                        and vibration by a specially designed isolation mount. A daughter card retain bracket is designed in
                        to prevent Cards from sliding out during shock and vibration.
                        The Mobile-PCs DC-DC Power supply has a micro-controller that controls and monitors various
                        functions of the power supply operation. It monitors automobile battery voltage to protect against deep
                        discharge. The Ignition lead is monitored to start the Mobile-PC when the ignition is turned on and to
                        implement a safe shutdown procedure. It controls and monitors motherboard signals to provide
                        smooth power-up and power down sequences. In addition, it also responds to shut down, stand-by
                        and hibernate modes. The power supply can be programmed to shut down the PC after a delay of up
                        to one hour. The power supply outputs are monitored to assure proper PC operation. A green LED
                        indicator in the power supply continually reports the power system status and health. It is also used
                        for troubleshooting.
                        There are features that are built-in for trouble free and safe PC operation. The input power is protected
                        against transients, load dumps and double battery during jumpstarts. PC does not reboot during
                        engine start or cranking.
                        Input: 12V 24V
                        Normal input voltage range: 7V to 18V DC 18V to 36V DC
                        Low battery shutdown voltage: 11.7 Volts ±. 75V
                        Low battery detection duration: 10 Sec.
                        Input current drain:
                        Power down/ Standby mode: 0.025 A
                        Output: 160W Ripple Regulation
                        +3.3V: 10A max, 15A pk, 50mV p-p max 2%
                        +5 V: 10 A max, 15A pk 50mV p-p max 2%
                        +12 V: 5 A max, 6.5 A pk 50mV p-p max 2%
                        -12 V: 0.2 A max, .4 A pk, 150mV p-p max 10%
                        5 V standby: 1 A max, 1.2 A pk 50mV p-p max 2%
                        Power supply efficiency > 90% at optimum loads
                        MTBF: 150,000 hrs
                        Operating Temperature Range: -25 °C to 70 °C
                        Ignition/ Power switch current drain: <10 mA
                        Input Fuse: 20A ATO replaceable (Automotive blade fuse)
                        Input Power Mating connector: Plug: AMP P/N: 350766-1
                        Crimps: Amp P/N: 640310-3 and 350919-3
                        Output Power Connectors: 20 pin ATX Mother power connector, cable length 240 mm long
                        8 pin Drive power connector to 3 HDD and 1 FDD power connectors
                        2 pin ATX power Switch connector, cable length 420mm
                        External Dimensions: 100mm(W) x 125mm (D) x 63.5mm (H)
                        3.94” (W) x 4.92” (D) x 2.5” (H)
                        Mobile-PC Case Specification:
                        External Dimensions: 13" W x 15.5"D x 5.6"H.
                        Motherboard: Full ATX mother board compatible
                        Expansion: 7 slots.
                        Drives mounts: 1 x 3.5” Hard drive mount with shock and vibration isolation.
                        1x 5.25” Bay front accessible ( CD-ROM, DVD ROM, CD-RW or removable HDD)
                        Security Lock: 4 pin cam lock
                        Mounting:
                        Bottom plate mounting: Four holes are located on the bottom corners of the chassis for # 8 screws.
                        Other mounting options: Mobile-PC Shock mount kit. (Adds 2” to the height of the Mobile-PC)
                        Floor mount bracket kit
                        Slide rail mount kit
                        Hard drive heater and controller option Call for detail
                        Hard Drive heater trigger temperature Below 8deg C. +- 3deg. Computer will not be turned below trigger temp.
                        Specifications subject to change without notice
                        Ordering Information
                        Part Number Description
                        MPC-ATX-CPS-A Mobile-PC Case and Power supply only
                        MPC-ATX-xx Custom configuration available, Call Sales for detail
                        OPUS Solutions. Inc. Email: [email protected]
                        6 Reef Tel: 949-388-7623
                        Laguna Niguel, CA 92677 Fax: 949-388-7628
                        www.opussolutions.com

                        Comment


                        • #13
                          I just got word from PC Power and Cooling that you do power the DC power supply directly off of the car's battery.

                          What am I missing?

                          Greg

                          Originally posted by InvisiBill


                          You can't just run wires from the battery to that DC PSU. It needs a regulated, relatively high current supply. The full DC-DC ATX supplies don't have enough current on the 12V, since they're powering the other voltages too. Look for all the "12V, 5A supply" posts...

                          Comment


                          • #14
                            Originally posted by gfoulks
                            I just got word from PC Power and Cooling that you do power the DC power supply directly off of the car's battery.

                            What am I missing?

                            Greg

                            Yes an ATX supply like that one will power your ATX motherboard. Some people have bought ITX based complete systems which have an internal DC-DC supply which takes a 12v 5amp input, but if as you say you only have the MB and not a case this doesnt apply to you.
                            -------------------------------------------
                            (=========-) 99% complete
                            --------------------------------------------
                            AMD K6/2 500 @ 450mhz to keep heat and power usage down, 64Mb, slim CDrom drive, 64mb USB pendrive for MP3 transfer, 10Gb 2.5" drive for MP3, USB>RS232
                            All jammed in external CDROM drive case.
                            Kenwood KVC-1000r In-Dash LCD. x-10 MouseRemote. Destinator V2 Gps. DC-DC with onboard Shutdown controller.
                            ----------------------------------------------

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                            • #15
                              Yes, the ITX cases come with an external AC-DC transformer and an internal DC-DC converter which splits the voltages for the different parts of the motherboard. It's similar to a laptop's power setup.

                              You can use an external DC-DC regulator (like the Targus Universal adapter thing or the Switchedmode ones) to supply regulated current to the DC-DC converter that's already in the case. That's what the 12V/5A supplies are for.

                              Or you can pull out what's already in the case, and replace it with a full ATX power supply that uses DC input instead of AC. That's what the Opus, Sproggy, PC Power & Cooling, and Keypower units are. These wire up directly to the car, and plug directly into your ATX motherboard.

                              Personally I think the regulator is a better idea if you already have an ITX case with the internal DC-DC. You've already got half of your power supply there, why rip it out and start from scratch? And this way, you can just unplug the miniplug from the case and carry the unit inside and use the AC-DC transformer it came with. If you already have the ITX case and do get rid of the existing stuff and go with a full DC PSU, I might be interested in buying the original PSU from you... Not sure from your posts if you actually got the case or not...

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