Announcement

Collapse
No announcement yet.

Help with 12V to 5V setup, having powering issues.

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Help with 12V to 5V setup, having powering issues.

    When power is applied to the 12V to 5V step down converter, it powers on all the KVMP devices. Apperently the converter has to be on before the KVMP is powered on or the USB devices do not connect correctly.

    So what I want to know, is there a way to connect something that will wait 3 seconds, then activate the KVMP switches? Something that is simple and easy?
    Nirwana Project, the Android/Win 7 hybrid system!

    1X Ainol Novo Flame Tab
    4X MK808b
    3x Perixx Touchpads
    3x 7 inch Screens
    1X 7 inch motorized Screen
    1x Win 7 PC

  • #2
    i have a couple ideas.

    how are the kvmp switches activated? is it just pressing a physical button?
    My OLD 2001 Mitsubishi Eclipse GT:
    "The Project That Never Ended, until it did"


    next project? subaru brz
    carpc undecided

    Comment


    • #3
      Originally posted by soundman98 View Post
      i have a couple ideas.

      how are the kvmp switches activated? is it just pressing a physical button?
      No, they power up when you plug them in. Meaning they are always on. I am guessing that when the 12V to 5V converter comes on, its either not stepping down the current fast enough, or it isnt at 5V, because when it activates the KVMP units makes two beeps, but the first beep sounds rundown.
      Nirwana Project, the Android/Win 7 hybrid system!

      1X Ainol Novo Flame Tab
      4X MK808b
      3x Perixx Touchpads
      3x 7 inch Screens
      1X 7 inch motorized Screen
      1x Win 7 PC

      Comment


      • #4
        ok, then you will need to delay the output of the 5v module to overcome it.

        i am thinking a module like one of these:
        http://www.davidnavone.com/cart.asp?14&pid=146
        http://www.buy.com/pr/product.aspx?s...id=18756548(or just search for 528t pulse timer-- there are tons of them)

        basically the idea is to setup a delay device like that to trip a relay that controls the output-- say 2-5 seconds after the 5v converter starts up, so it has time for the voltage to stabilize.

        that should take care of the issue..
        My OLD 2001 Mitsubishi Eclipse GT:
        "The Project That Never Ended, until it did"


        next project? subaru brz
        carpc undecided

        Comment


        • #5
          Originally posted by soundman98 View Post
          ok, then you will need to delay the output of the 5v module to overcome it.

          i am thinking a module like one of these:
          http://www.davidnavone.com/cart.asp?14&pid=146
          http://www.buy.com/pr/product.aspx?s...id=18756548(or just search for 528t pulse timer-- there are tons of them)

          basically the idea is to setup a delay device like that to trip a relay that controls the output-- say 2-5 seconds after the 5v converter starts up, so it has time for the voltage to stabilize.

          that should take care of the issue..
          How would this work though? With a relay? So it would be Converter, then timer, then a relay that is tripped by the timer to allow 5v connection?
          Nirwana Project, the Android/Win 7 hybrid system!

          1X Ainol Novo Flame Tab
          4X MK808b
          3x Perixx Touchpads
          3x 7 inch Screens
          1X 7 inch motorized Screen
          1x Win 7 PC

          Comment


          • #6
            You think a PAC-TR4 will do it? I actually have on sitting around. They come with a two second delay. Im going to have to go home and test it with that. i do not know if 2 seconds is long enough.
            Nirwana Project, the Android/Win 7 hybrid system!

            1X Ainol Novo Flame Tab
            4X MK808b
            3x Perixx Touchpads
            3x 7 inch Screens
            1X 7 inch motorized Screen
            1x Win 7 PC

            Comment


            • #7
              Here is an example of the setup. Is this correct? Originally I bought the PAC to be used with AMPcontrol, but now I use a USB relay to trigger the amps. The PAC should provide 2 seconds delay, and maybe another extra second to trip the relay?
              Attached Files
              Nirwana Project, the Android/Win 7 hybrid system!

              1X Ainol Novo Flame Tab
              4X MK808b
              3x Perixx Touchpads
              3x 7 inch Screens
              1X 7 inch motorized Screen
              1x Win 7 PC

              Comment


              • #8
                ^ yes, that should work, and that should be the correct connection method.
                My OLD 2001 Mitsubishi Eclipse GT:
                "The Project That Never Ended, until it did"


                next project? subaru brz
                carpc undecided

                Comment


                • #9
                  Originally posted by soundman98 View Post
                  ^ yes, that should work, and that should be the correct connection method.
                  Thanks soundman98. Crossing fingers that this will have enough delay!
                  Nirwana Project, the Android/Win 7 hybrid system!

                  1X Ainol Novo Flame Tab
                  4X MK808b
                  3x Perixx Touchpads
                  3x 7 inch Screens
                  1X 7 inch motorized Screen
                  1x Win 7 PC

                  Comment


                  • #10
                    OK, installed the PAC and looks like its a no go. I guess the unit works with pulses, which an amp is willing to accept, but a relay is a different story. The relay sits there and clicks like no tomorrow and no power from the 5V aspect is powered on. Is there something I can put in between the PAC and the relay? Like maybe a small capacitor?

                    OMG, why do the CAR PC Gods throw all these [email protected] curve balls at me! I cant help it that I made my install so nightmarish, but please don't make the easy things hard!
                    Last edited by HiJackZX1; 10-17-2011, 03:05 PM.
                    Nirwana Project, the Android/Win 7 hybrid system!

                    1X Ainol Novo Flame Tab
                    4X MK808b
                    3x Perixx Touchpads
                    3x 7 inch Screens
                    1X 7 inch motorized Screen
                    1x Win 7 PC

                    Comment


                    • #11
                      you'll need a transistor-- look around the M2 section. there are a couple of threads that talk about a solution to the low output of the anti-thump pin(where it won't have enough juice to turn on some amps)-- that circuit should be the exact thing you'll need.
                      My OLD 2001 Mitsubishi Eclipse GT:
                      "The Project That Never Ended, until it did"


                      next project? subaru brz
                      carpc undecided

                      Comment


                      • #12
                        Well the PAC has enough juice to turn on the relay, the problem is that its a pulse device so its turning off the relay off and on really fast. I figured that if I put a capacitor, then it would store the pulse and release it as constant, or do I have things wrong?
                        Nirwana Project, the Android/Win 7 hybrid system!

                        1X Ainol Novo Flame Tab
                        4X MK808b
                        3x Perixx Touchpads
                        3x 7 inch Screens
                        1X 7 inch motorized Screen
                        1x Win 7 PC

                        Comment


                        • #13
                          ah...

                          i was going to start on the explanation of how to make it work, but honestly, it is much more work then it is worth. you'd need a diode to prevent the voltage from going back into the PAC, a resistor to keep the voltage going slowly through the relay, a capacitor to store the charge, and a least a weekend to figure out what values of resistor and capacitor are the correct ones for this application...

                          just get one of the devices i linked to before-- that will solve the problem and give you a larger adjustment window if the 2 seconds isn't enough..
                          Last edited by soundman98; 10-17-2011, 05:57 PM.
                          My OLD 2001 Mitsubishi Eclipse GT:
                          "The Project That Never Ended, until it did"


                          next project? subaru brz
                          carpc undecided

                          Comment


                          • #14
                            Thru a diode to a cap to the PAC....

                            Don'tcha hate products without specs (TR4) like input current & impedance, time delays etc.
                            (Hence why so many DIY with web circuits.)

                            Comment


                            • #15
                              Originally posted by OldSpark View Post
                              Thru a diode to a cap to the PAC....

                              Don'tcha hate products without specs (TR4) like input current & impedance, time delays etc.
                              (Hence why so many DIY with web circuits.)
                              A diode to a cap to the PAC, or did you mean the relay?

                              Well I know the time delay is 2 seconds on the PAC.
                              Nirwana Project, the Android/Win 7 hybrid system!

                              1X Ainol Novo Flame Tab
                              4X MK808b
                              3x Perixx Touchpads
                              3x 7 inch Screens
                              1X 7 inch motorized Screen
                              1x Win 7 PC

                              Comment

                              Working...
                              X