first using · Fastest Finger First Mini Project using Microcontoller ( pdf,doc,ppt) fastest, fastest finger first using 89c51 project, project on fastest. I have designed the circuit using microcontroller, which scans the First step is designing the circuit. The microcontroller used in this case is AT89C51, an 8 bit microcontroller manufactured by Atmel (now Microchip). Quiz buzzer circuit operation using microcontroller (AT89C51) and timer for The team that presses the buzzer first is given the first preference for answering a question. buzzer.

Author: Kebar Goltikus
Country: Papua New Guinea
Language: English (Spanish)
Genre: Literature
Published (Last): 18 October 2011
Pages: 101
PDF File Size: 7.57 Mb
ePub File Size: 9.72 Mb
ISBN: 888-1-31188-553-5
Downloads: 17917
Price: Free* [*Free Regsitration Required]
Uploader: Vudoshakar

It provides time delay of 15 sec.

When a contestant presses his switch, the corresponding output of latch IC2 changes its logic state from 1 to 0. There are a total of nine input pins. When the system starts, the seven segment does not displays any output. Here we are using 16X2 LCD display. 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. A resource for professional design engineers.

The fastest-finger-firsg Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. Interface SD Card with Arduino. All Time Fav Videos! The system uses 89C51 microcontroller for controlling all the activities.

It poles all fastes-finger-first within 15 sec, and displays the result on LCD. This will cause no bus conflicts on the data lines. Potential Risks of Artificial Intelligence 18 December The quiz buzzer systems are widely used in school, colleges and TV programs.


8 candidate quiz buzzer using 8051 microcontroller (AT89C51)

For this reason buzzer fastest-ifnger-first are avoided for quiz contest held in colleges. As soon as any one of the inputs is pressed, the buzzer sounds for a small duration. The circuit can detect and record first hit contestant among all the contestants that may appear to be simultaneous. Eight pins of port P2 of the microcontroller are corresponding to eight inputs and one stop pin for resetting the buzzer system.

The team which presses the buzzer earliest is entitled to give the answer. Fsatest-finger-first IC78XX series of 3 terminal regulators are available with fixed positive voltages.

With a slight modification, this circuit can accommodate more than four contestants. If any posts here are hitting the copyrights of any publishers, kindly contact, it will be removed as soon as possible. You have entered an incorrect email address! Share to Twitter Share to Facebook. In many applications, it is necessary to supply constant dc voltage. Top 20 Computer Engineering Projects. There is also a provision for sounding a buzzer for a small duration.

I need a PCB layout of fastest finger first indicator without microcontroller. Pulse Code Modulation – Engineering Project.

Science, Electronic, Electrical, Mechanical Projects Models Reports

This quiz buzzer system has eight input pins corresponding to eight teams. This Fastest-ringer-first is only visible to Registered users.

There is also a provision for sounding a buzzer for a small duration. Sometimes two or more players hit the buzzer almost simultaneously and it is very difficult to detect which of them pressed buzzer first.

This quiz buzzer can be used for a maximum of eight teams. It works on 5V supply. In TV shows, where the whole event is recorded, the fastest-finger-firrst are replayed in slow motion to detect the first hit. Arduino based GPS receiver. This project aims to measure the RPM and controls the speed of motor.


Fastest Finger First Indicator

Design Guides Product Development: The USB interface is one of the solution This provides better way to display numbers and avoids conflict with contestant after the end of 15 sec. Embedded Hardware Engineer 28 December The audio alarm generator comprises clock oscillator IC7whose output drives a loudspeaker.

Simultaneously, an audio fasyest-finger-first and the correct decimal number display of the corresponding contestant are activated.

Reference design for Laser Drive Applications 6 December The output is displayed fastest-cinger-first a 16×2 liquid crystal display LCD. A buzzer is also sounded for a small duration to give an acoustic alarm. Polling method is used instead of interrupting the microcontroller, by using IC — as monostable multivibrator Timer. Gases like LPG, butane and propane ar Step down transformer is used to step down mains voltage which has In such cases the decision can be biased due fastest-fonger-first human intervention.

Logic 0 state at one of the outputs of IC2 produces logic 1 input condition at pin 4 of IC7, there by enabling the audio oscillator. In such cases the decision can be biased due to human intervention.