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.

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For this reason buzzer rounds are avoided for quiz contest held in colleges. The output is displayed on a seven segment display interfaced with microcontrollerwhich shows the number corresponding to the team which has pressed the button first. The circuit can detect and record first hit contestant among all the contestants that may appear to be simultaneous.

It has three control lines connected to port 2 of micrconroller. Power Bank fastet-finger-first Smartphones. As soon as any one of the inputs is pressed, the buzzer sounds for a small duration. Bridge type rectifier is used. Quiz-type game shows are increasingly becoming popular on television these days. Monostable multivibrator and inverter.

As with all the examples, I’ve left the power supply out. Tuesday, January 1, Such slow motions are possible only where huge funds are available to conduct the show. Please enter your name here.


Each switch is given to one team. When a contestant presses his switch, the corresponding output of latch IC2 changes its logic state from 1 to 0. The seven segment displays the number corresponding to the input pressed. Here we have not used internal software delay which is not variable externally once the program is written. This quiz buzzer disables the other inputs as soon as the first buzzer is pressed. Internship — Image Processing Engineer 27 December This problem is overcome by inserting known delays into our program.

The microcontroller keeps scanning the input pins. There is also a provision for sounding a buzzer for a small duration. Millions of engineers and scientists worldwide use MATLAB to analyze and design the systems and products transforming This project is an electronic display system that is affordable by fastest-finegr-first colleges and even individuals. Social Facebook Twitter GooglePlus.

Fastest Finger First | Full Circuit Diagram With Explanation

The project is useful for 8-team quiz contest, although it can be modified for more number of teams. While every effort is made to ensure the accuracy of the information on this site, no liability is accepted for any consequences of using it. Top 20 Computer Engineering Projects. The quiz buzzer systems are widely used in school, colleges and TV programs.

Virgin Galactic — Commercial Space Flight. Potential Risks of Artificial Intelligence 18 December These data lines are connected to port – fastest-finger-firxt of microcontroller. When the system starts, the seven segment does not displays any output. The conversion of ac to dc is achieved by rectifier supplied with ac signal using step down transformer.


Filter capacitor is used for removing ripples present at the output of bridge rectifier. In such cases the decision can be biased due to human intervention. The person who knows the answer hits the buzzer first and then answers the question.

Useful Raspberry Pi Projects. Output of rectifier contains pulsating dc which can be removed by use of filter circuit.

Fastest Finger First Indicator

Simultaneously, an audio alarm and the correct decimal number display of the corresponding contestant are activated. There is also a provision for sounding a buzzer for a small duration. In such cases the decision can be biased due to human intervention. This device has provision of avoiding key bouncing while the inputs are given. There are a total of nine input pins. Share to Twitter Share to Facebook. The oscillator frequency can be varied with the help of preset VR1.

It works on 5V supply. This quiz buzzer system has eight input pins corresponding to eight teams.