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Discussion in 'Hobby Electronics' started by Caliban, Mar 11, 2005.

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  1. Caliban

    Caliban Guest

    If I use an LM1881 IC to strip the H and V sync off of an EIA RS170 sync
    on green video signal (NTSC?), could I then apply the RGB video lines
    and sync signals to a standard LCD or VGA computer monitor?

    The RGB video signals are 0.7V analogue, 16kHz Horiz, 720 x 540
    dots/lines resolution.

    The other problem is finding a source of 12 to 13" Monitors, Google has
    turned up a few overseas but none in Aus.
  2. Caliban

    Caliban Guest

    Also looking at 15" and 17" monitor specs I notice they have a minimum
    30kHz horizontal scan, where as my signal is 15kHz. Any ideas?
  3. Mr.T

    Mr.T Guest

    I don't think you'll find any multisync monitors made in the last ten years
    that go down to 15kHz, except those already designed for TV use.

  4. Fred Ferd

    Fred Ferd Guest

    TOO SLOW for a standard VGA CRT !
    The CRT's expect at least 50Hz vertical and 30kHz horizontal.

    So you are hitting it with 16kHz and 30Hz..

    Perhaps an LCD can do it - they often have tuner attachements optional.

    yeah its hard to find a small CRT.

    easy to find small TV's, what are you doing ?? why not convert current
    signal to Composite ??
  5. Caliban

    Caliban Guest

    Thanks for the replies, I did a bit of Googling and the info on trying
    to get old video arcade games to connect to TVs and monitors is pretty
    much what you have covered.

    It's a replacement for a few very old process control monitors on a
    ship. The sensors and processing are ok but the monitors are
    unserviceable. Apparently replacements were not available.

    But I have found a company in the UK that make exactly what I'm after ( ) - it just comes down to the price now

    If they are too expensive I'll try RGB -> composite conversion using
    something like the Motorola MC1377 and send it to an LCD or CRT TV
    monitor and see what the quality is like.
  6. Caliban

    Caliban Guest

    Fred Ferd wrote:
    Yeah it looks like that's what I'll have to do.
    See my post above.
  7. Fred Ferd

    Fred Ferd Guest

    yeah, well for a small computer accurate display you can always try
    australian electronics catalogues like "farnell" for "price".

    they'll have small CRT's of some sort.

    TV's look a bit unprofesional, with their tuning buttons and speakers..
  8. Terry Given

    Terry Given Guest

    buy a modern TV, with no buttons other than on/off. Just dont lose the
    remote control :)

  9. Alex Gibson

    Alex Gibson Guest

    What about getting a US NTSC lcd display ?
    Lots of industrial types. carries lot but will rip you big time on shipping
    (plus java based website)
    They have 11.3 and 12.1 inch lcds

    Will need to get power supplies as well
    May need to get a mositure proof casing

    Going to be pricey unless you can buy second hand.

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