- 8 Candidate Quiz Buzzer Using 8051 Microcontroller At89c51 Pdf Online
- 8 Candidate Quiz Buzzer Using 8051 Microcontroller At89c51 Pdf Free
This quiz buzzer system has eight input pins corresponding to eight teams. The output is displayed on a seven segment display (interfaced with microcontroller), which 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.
For more details, refer ‘seven segment interfacing ’. There are a total of nine input pins. Eight pins of port P1 of the microcontroller are 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.
More memory and more high-quality A/D converters comes on the market.8 CANDIDATE QUIZ BUZZER USING 8051 MICRO CONTROLLER (AT89C51) 2.2 AT89C51 Microcontroller MICROCONTROLLERS Microcontrollers’ producers have been struggling for a long time for attracting more and more choosy customers. Quiz Buzzer Circuit Design. The circuit involves using five major components – 8051 Microcontroller, SPST Push Buttons, a buzzer and a common anode 7 segment display. The microcontroller used in this case is AT89C51, an 8 bit microcontroller manufactured by Atmel (now Microchip). 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. This quiz buzzer can be used for a maximum of eight teams. It is build around 8051 microcontroller (AT89C51). This quiz buzzer system has eight input pins corresponding to eight teams.
8 Candidate Quiz Buzzer Using 8051 Microcontroller At89c51 Pdf Online
![8 Candidate Quiz Buzzer Using 8051 Microcontroller At89c51 Pdf 8 Candidate Quiz Buzzer Using 8051 Microcontroller At89c51 Pdf](/uploads/1/2/6/0/126015606/308373852.jpg)
8 Candidate Quiz Buzzer Using 8051 Microcontroller At89c51 Pdf Free
When the system starts, the seven segment does not displays any output. The microcontroller keeps scanning the input pins. 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 the system.