8 CANDIDATE QUIZ BUZZER USING 8051 MICROCONTROLLER AT89C51 PDF

8 CANDIDATE QUIZ BUZZER USING 8051 MICROCONTROLLER AT89C51 PDF

Oct 11, 8 CANDIDATE QUIZ BUZZER USING MICROCONTROLLER The AT89C51 microcontroller is a 40 pin package in which 32 pins can be. Apr 15, Here is the simple circuit diagram of 8 player quiz buzzer using at89c51 microcontroller. It is a simple circuit with minimum number of. Apr 3, Here is a simple 8 channel quiz buzzer circuit using microcontroller designed using AT89C51 Microcontroller. It can be used in schools.

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Shall be very mauch thankful to you. IF you any query about any project related than write your comment in comment box. The quiz buzzer systems are widely used in school, colleges and TV programs. The team which presses the buzzer earliest is entitled to give candixate answer.

8 Candidate Quiz Buzzer Circuit using Micr

At times it becomes very difficult to identify which team has pressed the button when two teams press the buzzer within a very small time gap. In such cases the decision can be biased due to human intervention.

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The quiz buzzer presented here takes care of the aforesaid problem. This quiz buzzer disables the other inputs as soon as the first buzzer is pressed.

8 CANDIDATE QUIZ BUZZER USING 8051 MICROCONTROLLER

This quiz buzzer can be used for a maximum of eight teams. It is build around microcontroller AT89C This quiz buzzer system has eight input pins corresponding to eight teams.

The output is displayed on a suing segment display interfaced with microcontrollerwhich shows the number corresponding to the team which has pressed the button first. A buzzer is also sounded for a small duration to give an acoustic alarm.

The connections of the seven segment, input pins and output pins is shown in the circuit diagram. There are a total of nine input pins. Eight pins of port P1 of the microcontroller miceocontroller corresponding to eight inputs and one stop pin for resetting the buzzer system.

On the output side a seven segment is connected to display the corresponding output number. There is also a provision for sounding a buzzer for a small duration. When the system starts, the seven segment does not displays any output. The microcontroller keeps scanning the input pins.

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8 Candidate Quiz Buzzer Using At89c51 Microcontroller

As soon as any one of the inputs is pressed, the buzzer sounds for a small duration. The seven segment displays the number corresponding to the input pressed.

Now even if any other input pin is pressed, there will be no effect on the system till the time the stop pin is pressed to reset ar89c51 system. Noriel Idiesca 19 September at Anonymous 23 September at Anonymous 24 September at Anonymous 25 November at Anonymous 1 April at Lanka Saipoornima 9 April at Sunny Nadamvar 12 April at Haris Nadeem 19 May at