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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It can show 16 characters in 1st line and 16 characters in 2nd line. This high to low output is an indication to the microcontroller, implying that the time period of accepting inputs is over. This quiz buzzer can be used for a maximum of eight teams.

The quiz buzzer systems are widely used fastest-finger-firsf school, colleges and TV programs. Here we have not used internal software delay which is not variable externally once the program is written.

Interface SD Card with Arduino.

This problem is overcome by inserting known delays into our program. It is build around microcontroller AT89C The is an 8-bit microcontroller.


By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C51 is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications.

The team which presses the buzzer earliest is entitled to give the answer. With a slight modification, this circuit can accommodate more than four contestants. The quiz buzzer presented here takes care of ising aforesaid problem.

It is 8c951 for amplification and switching purposes.

Reference design for Laser Drive Applications 895c1 December The piezo buzzer produces sound based on reverse of the piezoelectric effect. Skip to main content.

Electronic Projects: Fastest Finger First Mini Project using Microcontoller

A resource for professional design engineers. In such cases the decision can be biased due to human intervention. This quiz buzzer disables the other inputs as soon as the first buzzer is pressed. This quiz buzzer system has eight input pins corresponding to eight teams.

Share to Twitter Share to Facebook. The output is displayed on a 16×2 liquid crystal display LCD. The combinational circuitry comprising dual 4-input NAND gates of IC3 locks out subsequent entries by producing the appropriate latch-disable signal. The seven segment displays the number corresponding to the input pressed.

8 candidate quiz buzzer using 8051 microcontroller (AT89C51)

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Simultaneously, an audio alarm and the correct decimal number display of the corresponding contestant are activated. As soon as any one of the inputs is pressed, the buzzer sounds for a small duration.

Choosing Battery for Robots. If any posts here are hitting the copyrights of any publishers, kindly contact, it will be removed as soon as possible. The USB interface is one of the solution Monostable multivibrator and inverter. AT89C51 is an fastest-finger-figst microcontroller and belongs to Atmel’s family. Virgin Galactic — Commercial Space Flight. Pulse Code Modulation – Engineering Project.

Fastest Finger First Indicator

It has flash memory. Diodes 1N form the bridge rectifier. A buzzer is also sounded for a small duration to give an acoustic alarm. The quiz buzzer presented here takes care of the aforesaid problem. Please enter your comment! Thursday, August 22, We make no effort to place the Data bus into reverse direction.

In many applications, it is necessary to supply constant dc voltage.