I originally used a box with a door bell and a buzzer, but more often than not, I was not sure who hit their button first, so I enlisted an electronics man in our church in Albuquerque to build me a relay driven brain for my 2 player buzz box. This unit lasted almost nine years, until humidity and transportation damage did their work. One day, right in the middle of a service, it died. Just a side note: WHEN SMOKE COMES OUT OF A CHILDREN'S CHURCH PROP, IT COULD BE A PROBLEM!
I then went to the local ITT Tech school and went to their lab department instructor. I described what I wanted, and asked if any of the students could build me a new control module. He offered it as a lab project to his students, and they argued over who got to build it.
When it was finished, what was to be a basic two player control, which activates a large LED light for each channel, became a four player controler, each channel activating an A/C plug (light panels are lighted by strings of christmas lights), AND a distinct sound tone for each light.

Keep coming back here, as I will put a scan of the schematic here very soon.

Enjoy!

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