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AV to VGA converter, looking for 74LS366

maskenlosmaskenlos
edited October 2008 in Hardware
Hi All,

I recently find an AV to VGA converter here:

http://www.pollin.de/shop/shop.php

The price seems very interesting for me so I bought one.
First test on Friday shows perfect results, if someone needs help for ordering or translation, just ask.

I plan to build on board jostick interface and look therefore for a 74LS366. I was not able to find a source on net. Next hardeware store which has it on stock is 1h by car. Can some help, online shop in Germany would be great?

Thanks

Stephan
Post edited by maskenlos on

Comments

  • WinstonWinston
    edited September 2008
    You're going to have a hard time finding everything in 74LS these days as it's no longer made. However, 74HCT is a drop in replacement. With some slight modifications to the circuit you can use 74HC.

    Also note that with small circuit modifications you can use any suitable tristate inverting buffer instead of the '366 - if you can locally get a 74LS240 or 74HCT240, with some small modifications to the circuit you could use that instead.

    Here is a list of all 74-series buffers in production:
    http://www.standardics.nxp.com/products/buffers/parametric/?family=34

    with links to datasheets.

    You can get the 74HC366 from Farnell (in SOIC only). It's not a very common chip. If it were me I'd be looking to make it work with something more common.
  • maskenlosmaskenlos
    edited October 2008
    Hi Winston,

    thanks for your hints and tipps.
    Will see if I can get a LS366 and otherwise I will go to one of your choices.

    Thanks and regards,

    Stephan
  • LaesQLaesQ
    edited October 2008
    Was it this one?

    http://www.pollin.de/shop/shop.php?cf=detail.php&pg=NQ==&a=OTA4ODcyOTk=

    Cheers,
    LaesQ
  • maskenlosmaskenlos
    edited October 2008
    Yes, this one! It works fine so far.
    Do you plan to buy one?

    Regards,

    Stephan
  • LaesQLaesQ
    edited October 2008
    Not planning to buy one just yet. Just wondering what connection you're using. I assume you're using composite video.

    Also, it'd be nice to know what chips are in this beast. If you're happy to, it'd be nice if you could take the top off and take some photos of the chips inside.

    I suspect I know which chip(s) this box uses and the output is either 60 or 75hz depending on resolution. This can create an odd or jerky look to 50hz scrolling screens, messages, effects, etc.

    But let us know what's in this beast if you can :)

    Cheers,
    LaesQ
  • maskenlosmaskenlos
    edited October 2008
    I will check out next week, no Problem!
    So far I have not tested the unit very well but just playing BRUCELEE a little bit. So far no problems.

    If you have any software you want to check, just drop me a message.

    Thanks and Regards,

    Stephan
  • LaesQLaesQ
    edited October 2008
    If my suspicions are correct, it should contain (amongst other chips) a PVX-521 or PVX-522. But it'll still be nice to know what really is in it.

    Cheers,
    LaesQ
  • GodsGods
    edited October 2008
    LaesQ wrote: »
    If my suspicions are correct, it should contain (amongst other chips) a PVX-521 or PVX-522. But it'll still be nice to know what really is in it.

    Got one (directly from China). it use tvia chip, trueview5715.
    Hires inside pictures at: here and here
  • maskenlosmaskenlos
    edited October 2008
    Hi all,

    thanks for opening your unit, Gods. Thus I do not have to open my!
    @LaesQ: Whats you conclusion now? Do you expect any problems in scrolling screens?

    I got two of 74LS366 in a shop which has a large stock of 74xyabc! Superb!

    Regards,

    Stephan
  • GodsGods
    edited October 2008
    maskenlos wrote: »
    thanks for opening your unit, Gods. Thus I do not have to open my!
    @LaesQ: Whats you conclusion now? Do you expect any problems in scrolling screens?

    i don't think so, the tvia chip is optimized for 50hz --> 60 hz conversion.
    http://www.tvia.com/index.cfm?page=body&crid=61
    (trueview5725 chip, is similar to 5715)
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