In the buzzer round of quiz contests, the question is thrown open to all the teams. The person who knows the answer hits the buzzer first and then answers the question. Sometimes two or more players hit the buzzer almost simultaneously and it is very difficult to detect which of them has pressed the buzzer first. In television shows, where the whole event is recorded, the actions are replayed in slow motion to detect the first hit. Such slow motions are possible only where huge funds are available to conduct the show.
For this reason, buzzer rounds beginning for quiz contests held in colleges. This project is useful for a 5-team quiz contest, although it can be modified for more number of teams. This system is sensitive. The circuit can detect and record the first hit contestant among all the contestants that may appear to be simultaneous. We have designed the circuit using an ATmega328P microcontroller, which scans the input from push buttons and displays the corresponding number on a computer display. It is a simple circuit with the minimum number of components and without any complexities. Even though this system is designed for only for 5 teams, more teams can be added.”