Quiz Buzzer System

The Quiz Buzzer Circuit using Microcontroller is an integrated circuit with a number of input devices based on the number of led's used.

The entire operation is conducted by a microcontroller through a program written in C-language and dumped inside a microcontroller. When one of the buttons is pressed, the buzzer will start ringing and the corresponding number will be displayed on the 7-segment display.

Technology

Hardware: 8051 Microcontroller, SPST Push Buttons, Buzzer,  7 segment display. The microcontroller used in this case is AT89C51, an 8-bit microcontroller manufactured by Atmel.

Software and Programming Language: Keli Microvision  and C language

Working

Once the circuit is driven, the programmer must initialize the stack pointer and the variables that have non-zero initial values and do another initialization step and then call the main function. It then scans to see if any of the keys were pressing.

In other words, the microcontroller searches for any of its input pins at port P1 to be null or theoretically small. If the button is pressed, the show feature is named by moving the corresponding number. The microcontroller then transfers the necessary signals to the port linked to the 7-segment screen.