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  • No idea what power supply to get

    Hi there,

    My DC-AC inverter just croaked, and I'm tired of hearing that buzzing sound so I suppose it's time to switch to a DC-DC converter. My problem: I have no idea which one to get! Here is everything (as of now) that will need to be powered:

    Netbook
    External WiFi Antenna
    GPS Receiver
    Lilliput 7" Touchscreen
    External Camera

    I am also considering throwing in another computer that would be dedicated to video recording.

    I don't want a cheap PSU, but I want to spend as little as possible. I would like to air on the side of too much power than not enough. My inverter was 300W, so I assume that I would be aiming at around 320W-360W (correct me if I'm wrong). I was looking at the Opus 360W, which seems nice, but I'm not too sure about the others and how they compare. Any advice? Thanks!

    IHateMayonnaise

  • #2
    More information is probably going to be needed as to how everything is hooked up currently.

    Thread moved to the newbie section.

    I think your understanding of a DC to DC PSU is a little off. It sounds like you'd be better off finding an automotive adapter for your netbook and an automotive adapter for your lilliput. Everything else you listed should be powered off either the PC or the car's 12v directly, depending on which products you have. Once you throw in an actual desktop-style PC, you'll need to start looking at DC to DC PSUs.
    Tidder

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    • #3
      Originally posted by Tidder View Post
      More information is probably going to be needed as to how everything is hooked up currently.

      Thread moved to the newbie section.

      I think your understanding of a DC to DC PSU is a little off. It sounds like you'd be better off finding an automotive adapter for your netbook and an automotive adapter for your lilliput. Everything else you listed should be powered off either the PC or the car's 12v directly, depending on which products you have. Once you throw in an actual desktop-style PC, you'll need to start looking at DC to DC PSUs.
      All accessories (cam, GPS, OBD2 etc) are connected via USB. The computer was connected to it's DC adapter which plugged in to my AC inverter, as did the display (which has a cig input option). How would I go about getting an automotive adapter for my netbook? Would it replace my ac-dc adapter that the unit currently uses or would it go before?

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      • #4
        So....any advice? Please?

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        • #5
          i second the netbook adapter-- it should (in theory), be able to power all usb devices as well.
          My OLD 2001 Mitsubishi Eclipse GT:
          "The Project That Never Ended, until it did"


          next project? subaru brz
          carpc undecided

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          • #6
            Originally posted by soundman98 View Post
            i second the netbook adapter-- it should (in theory), be able to power all usb devices as well.
            Thanks for the reply.

            How do I use the netbook adapter to power the system from my car? The adapter is AC-DC? Sorry I'm a newb; I'm good at other things though. If you want I can explain to you quantum physics or differential equations or something

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            • #7
              hehe, i have a hard time understanding spanish, let alone quantum physics .

              the netbook adapter should really just be a very basic dc-dc adapter(they usually just plug into the cigarette adapter): it will take car voltage in(9-15v), and output the correct voltage your netbook uses on the charge port(usually 12v?)
              My OLD 2001 Mitsubishi Eclipse GT:
              "The Project That Never Ended, until it did"


              next project? subaru brz
              carpc undecided

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              • #8
                Originally posted by soundman98 View Post
                hehe, i have a hard time understanding spanish, let alone quantum physics .

                the netbook adapter should really just be a very basic dc-dc adapter(they usually just plug into the cigarette adapter): it will take car voltage in(9-15v), and output the correct voltage your netbook uses on the charge port(usually 12v?)
                As long as you can do (basic) differential equations and maybe a little linear algebra and know that "there is no spoon" quantum physics isn't too bad. Seriously.

                My netbook adapter, the AC-DC one, plugs directly into the wall. I know that all (or most) modern notebook adapters can "adapt" to different input voltages and output the correct ones needed for the computer. However, my comp does not come with a cig adapter, and previously I was going from the cig to an AC inverter to my netbook supply (i.e., DC-AC-DC). I am looking to tap in as directly as I can to the DC power supply without going back and forth between Edison and Tesla.

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                • #9
                  Run down to your local Rat-Shack and ask for the 12VDC iGo adapter and brick for your laptop. Will cost ~$30 and will save a lot of hassle.
                  After a 2 year break, I'm back! There are so many new and familiar faces here!
                  New vehicle, new ideas!

                  Chryssi - The Changeling CarPC Project

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                  • #10
                    Originally posted by freeflashstuff View Post
                    Run down to your local Rat-Shack and ask for the 12VDC iGo adapter and brick for your laptop. Will cost ~$30 and will save a lot of hassle.
                    I will go to ratshack tomorrow; but for the igo can that power my screen as well? My lilliput has a cig adapter, but I only have one of those. Should I just tap it directly in to the line?

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                    • #11
                      If you do that, tap in before the box on the cig plug. (like the attached picture shows) The circuit board inside shows the polarities for the wires. The box is a power regulator. It takes the dirty 12VDC (really ~14.3-14.4VDC) and cleans it up (to true 12VDC). Also, make sure your cig lighter wiring can handle the current you're going to be pulling.
                      Attached Files
                      After a 2 year break, I'm back! There are so many new and familiar faces here!
                      New vehicle, new ideas!

                      Chryssi - The Changeling CarPC Project

                      Comment


                      • #12
                        Originally posted by freeflashstuff View Post
                        If you do that, tap in before the box on the cig plug. (like the attached picture shows) The circuit board inside shows the polarities for the wires. The box is a power regulator. It takes the dirty 12VDC (really ~14.3-14.4VDC) and cleans it up (to true 12VDC). Also, make sure your cig lighter wiring can handle the current you're going to be pulling.
                        I went to ratshack and looked at the igo systems; the guy said I would need the 120 watt version which runs over a hundred bucks. He also said that due to the amount of accessories I would have attached it might be a better idea to just get another inverter -- they sell a 1500 watt one for $150 and he assured me that it would not make a buzzing sound.

                        In the end I might be powering two PCs -- one for navigation and music and whatnot and the other for video and sound recording. Can anyone suggest something specific that I should get? How do I know how much wattage my cig lighter can handle?

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                        • #13
                          Cig sockets may handle 15A, but anything over 8-10 is usually pushing things. (V x I = Pwr, so 10A = ~12V x 10A = 120W.)

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                          • #14
                            Originally posted by OldSpark View Post
                            Cig sockets may handle 15A, but anything over 8-10 is usually pushing things. (V x I = Pwr, so 10A = ~12V x 10A = 120W.)
                            So..I should go for the 120W iGo adapter? Is this the best option?

                            EDIT: what's to stop me from getting a cig power adapter for my netbook off ebay? like this:http://cgi.ebay.com/Travel-Car-Charg...item255af23f47

                            Ive got the Asus eee 1005ha

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                            • #15
                              nothing, ebay is one of the more prevalent places to get the adapter from.

                              if you want to get the radio shack adapter, make sure to get the guys personal cell phone number, and let him know that you will be calling him if it doesn't work...
                              My OLD 2001 Mitsubishi Eclipse GT:
                              "The Project That Never Ended, until it did"


                              next project? subaru brz
                              carpc undecided

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