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Video select logic with Multiplex IC?

Discussion in 'Electronic Basics' started by SixteenThirtytwo, Mar 9, 2007.

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  1. I'm working on a circuit for my Atari ST computer which allows for
    different monitors/TVs to be used, but I'm stuck when it comes to the
    "logic" part of it although I think I have a functioning idea ;-)

    Do I need a "multiplexer" type of IC as the "electronic switch" (U1)?
    What about the "logic" ICs that control U1, setting it to 3 different
    positions according to the logic state of the "mono detect" line and
    the micro-switch inside the DIN-13 connector?
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