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  • grounding?

    i know this is a stupid question, but what exactly is grounding?

    i was planning on a plexiglass case and Arby's site said something about grounding.


  • #2
    Computers, and most other electronics for that matter, have a common ground. In computers, this is all of the black wires. The computer's electricity all runs from some voltage to the commmon ground.

    12V -> ground, 5V -> ground, etc.

    If you connect the common ground of the computer and the ground of the audio system to the car's ground, this will prevent any humming or static in the audio.

    In most car's, all metal parts are grounded, and the ground runs to the negative (black) terminal of the batter.

    Anything else I forgot?

    ------------------
    http://mp3box.2y.net
    www.arbybean.com

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    • #3
      Ok.. this is a question for Arby. I have soldered the wires for an AUX INPUT on the IPBUS except that the audio ground wires are NOT grounded to a common ground. If i ground those wires would that solve the static noise that I have right now?? and where should I ground it to?

      the car stereo has it's own ground somewhere in the front and my box is in the trunk connected to it's own ground along with the inverter. Should I connect the audio ground to the common ground on the trunk or to the head unit like you did?
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      • #4
        I had a real nasty humm until I connected the audio ground to a metal part on the back of the head unit. Two ground wires go to the ipbus, and one goes to the head unit.

        http://mp3box.2y.net/photos/ipbusadapter.jpg

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        • #5
          ok ..I will try grounding the audio. I had some spare time so I thought i would do some paintbrush drawing of my setup showing where everything gonna be groudned to.


          And about your IP-BUS AUX IN hack...

          a while ago someone else posted this picture of the IP bus input. It doesnt seem to match the one you posted. Can you explain this?? I had it done this way and it seems to be working fine.




          ------------------
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          http://www.arcdesigns.net/carpc/

          My TL CarPC ver2

          FSR Flash Skin w/ moving weather maps

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          • #6
            Yes, that matches mine. Mine is a diagram of the female plug, that is a diagram of the male plug, so it's a mirror image. Mine is drawn looking at the back of the head unit... guess I should clarify that.

            And the ground drawing looks fine to me.

            ------------------
            http://mp3box.2y.net
            www.arbybean.com

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            • #7
              umm..excuse me if im mistaken...

              But Arby, from what i can work out, (asumming the other diagram is correct) your diagram has the left channel reversed (L- is L+ and vise versa) Having the left channel out of phase with the right isn't going to sound too good.

              But i may be wrong.
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