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8 Channel Quiz Buzzer Circuit using Microcontroller In this project, I’ll show you the design and working of an 8 Channel Quiz Buzzer Circuit using Microcontroller (8051), which tells us which team has pressed the button first in a quiz or game show.  Quiz buzzers are used often at places like educational institutions and game shows, where it is required for the organizers to know who pressed the button first. Conventional systems require human intervention to decide which team has pressed the button and this system can be erroneous and even biased. Another problem arises when two members pressed the button at a negligible interval and it is difficult to guess who has pressed the buzzer first. Here in this project, I designed an Automatic Quiz Buzzer System in which, when more than one team presses the buzzer, the delay between the two button presses is accurately taken into account and the corresponding number is displayed. I have designed t...