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Circuitry for a Trivia Quiz Night

Discussion in 'General Electronics Discussion' started by Zephyr, Apr 17, 2010.

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  1. Zephyr

    Zephyr

    2
    0
    Apr 17, 2010
    Hey:

    I'm pretty technologically illiterate - I know the basic voltages, amperes, and electronic hardware, but you lose me when you talk about ICs. Trust me, i'm trying to learn them.

    Then again - we're hosting a trivia night a few days from now. I'm trying to design a circuit so that when an entrant presses a button, a light bulb corresponding to him lights up, and it inhibits all the other competitors.

    As in, when Switch A is pressed, Light bulb A lights up, and Switch B, C and D don't work any more. Alternatively, if Switch B is pressed, Light bulb B lights up, but A, C and D don't light up their respective light bulbs.

    It's really got me stumped. If any help can be provided, many thanks. All that is required is to have a way to find out who clicks a switch first.
     
    Last edited: Apr 17, 2010
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,482
    2,830
    Jan 21, 2010
    A few days doesn't leave you a long time...

    try this, or this or this.

    The first 2 are variations on a theme, the last one is really simple and could (maybe) be put together in time.
     
  3. Zephyr

    Zephyr

    2
    0
    Apr 17, 2010
    The last one is going to help immensely, seeing as it's the only one I understand - thanks a lot.
     
  4. KMoffett

    KMoffett

    723
    75
    Jan 21, 2009
    Zepher,

    With the SCR circuit, be sure you use "non-sensitive gate" SCRs. "Sensative gate" SCRs will not work properly.

    Been there, done that.

    Ken
     
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