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VGA Cable

Discussion in 'Electronic Basics' started by Rene, Apr 18, 2004.

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  1. Rene

    Rene Guest

    I am trying to make my own VGA cable. I understand that not all of the 15
    pins are used. Could someone tell me what are the minimum pins that I have
    to wire to make the cable work?



    Thank you.
     
  2. John Jardine

    John Jardine Guest

    Pin 1=Red Video
    Pin 2=Green Video
    Pin 3=Blue Video
    Pins 5-6-7-8-10 =Ground
    Pin 13=Horizontal Sync
    Pin 14=Vertical sync
     
  3. Rich Grise

    Rich Grise Guest

    Let us know how the video looks if you do it without coax. ;-)

    Thanks,
    Rich
     
  4. Rene

    Rene Guest

    This is probably another stupid question but, when I wire this thing
    (computer VGA cable) up, pin 1 connects to pin 1, pin 2 connects to pin2,
    pin 3 connects to pint 3 etc....



    Is this correct, or is there something hidden that I don't know about?
     
  5. Tim Auton

    Tim Auton Guest

    I just helped my dad fit a little security camera. It has about 15m of
    unshielded, untwisted 4-core cable (not coax) to carry composite
    video, audio and power. Remarkably enough it actually works, and with
    minimal interference.


    Tim
     
  6. soundman

    soundman Guest

    That's correct. For best results, or for long runs, 75R coax cables or
    twisted pairs will give better signal transmission for the RGB signals. If
    you use coax or twisted pair, use pin 6 for red earth, 7 for green and 8 for
    blue. If the signal source is a properly designed video output, this will
    give you good results up to 40 metres or more. Pin 10 is usually used as
    the signal earth for both sync signals and pin 5 is not normally required.
    Some devices also use other pins for communication between PC and monitor.
    Plasma screens, projectors etc don't use them so they can normally be left
    unconnected.
     
  7. John Larkin

    John Larkin Guest

    The cheap RatShack [1] extender cables are just wires. You get nasty
    ghosts and edge effects with them. Very annoying.

    John

    [1] or, around here, they are all run by Russians so we call it Russky
    Shack.
     
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