OT: Quiz Buzzer

Giganews Newsgroups
Subject: OT: Quiz Buzzer
Posted by:  Grinder (grinder@no.spam.maam.com)
Date: Fri, 12 Oct 2012

This is not really computer related, but it is hopefully of interest

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There are a lot of digital circuit designs out there that implement a
quiz buzzer.  The basic layout is N buttons and N lights.  Whichever
button is pressed first will light the corresponding light, and the
remaining buttons are locked out.  There is generally an additional
reset button.  Easy enough.

Now does anyone have any ideas how an RF wireless scheme could be
implemented with one of these circuits?  Meaning, the physical button
would be replaced with a receiver sensitive to N transmitters within a
given range--hopefully around 40' or so.

The solution should be cheap as well--not pennies per transmitter cheap,
but I don't want to have to buy N wireless keyboards and tear them apart.

Thanks for your consideration of this problem.