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RGB sync question

Discussion in 'General Electronics' started by Caj Zell, Aug 2, 2003.

  1. Caj Zell

    Caj Zell Guest

    Hi!

    I have a RGB sync related question.

    I have three different wires (R,G,B) and an additional "csync". The
    device that I want to feed these signals through expects RGB with
    "sync-on-all". What is the easiest way to accomplish this?

    Caj Zell
     
  2. Sotris Pdmtr

    Sotris Pdmtr Guest

    Hi
    We have designed a RGsB/S-Video converter previously, and I've found
    that circuit somewhere on net when I was searching for infos on
    RGs(ync)B signal.
    It's a Sync to Green adder but I think three of them (each one at a
    color of RGB lines) would do the job for your project.

    #################################################################

    100 uF
    ! !
    Green ----! !---------------------------------
    -! !+ !
    !
    680E !
    BC548 !
    HSync ------------- __---------/\/\------o--------- CSync on
    Green
    \ /!
    \ /
    ---------
    !
    !
    1k !
    VSync ----/\/\----------


    [note by the original poster: BC548 is a transistor, the /\/\ 's are
    resistors
    and the 100uF is a condensator. :)
    This one works perfectly without _ANY_ logical circuits and thus needs
    _NO_ 5 Volts or anything else. Note: This works only with syncs that
    are active low, but since this is the default for _any_ sync signal,
    you would not have to expect any problems with this circuit.
    ################################################################
    Hope that helps ;)
    Best Regards

    Sotris Pdmtr
    http://www.aspisys.com/products.htm

    ASPiSYS Ltd.
    Electronic Design Company
    P.O.Box 14386
    Athens 11510
    GREECE
    Tel : +30 210 7719 544
    Fax : +30 210 7714 983
     
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