Help me make a buzzer system for my classroom.

I am a Philadelphia public school teacher and I would like to make some type of "ring in" or buzzer system so small groups of students can compete in review games. Ive been trying to do some research with LED's and simple circuits but I dont have the know how to make sense of it all. I am certain that someone on this site does. If you could help me out or point me in the right direction my students and I would greatly appreciate it.

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c735jim5 years ago - I'm not an electrician, however, this one looks like something simple enough to build.
Goodhart9 years ago
This one here looks to be like one of the simplest ones I have seen. The one at this site is simply overkill...
Blimey that is one insane jeopardy game !
If you mean that second link, yeah, that is a bit over the top ;-)
The circuitry is so complicated lol
It is MUCH unnecessary complexity for the job it needs to do.
They did say it was a challenge, but they also said it was cheap to build...
Man! That is so complex!
Lots of redundancy :-)
Ha! Yeah...
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