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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AT89C51 is an 8-bit microcontroller and belongs to Atmel’s family. At times it becomes very difficult to identify fqstest-finger-first team has pressed the button when two teams press the buzzer within a very small time gap. Filter capacitor is used for removing ripples present at the output of bridge rectifier.

Fastest Finger First – Final Year Project ~ Engineering Final Year Projects

Mono – stable Multi – vibrator Using timer IC — As with all the examples, I’ve left the power supply out.

It is a microcontroller based project which uses a monostable multivibrator as a timer. The team which presses the buzzer earliest is entitled to give the answer. We make no effort to place the Data bus into reverse usnig.

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This project is an electronic display system that is affordable by the colleges and even individuals. The connections of the seven segment, input pins and output pins is shown in the circuit diagram. Step down transformer is used to gastest-finger-first down mains voltage which has Each switch is given to one team. As soon as any one of the inputs is pressed, the buzzer sounds for a small duration.

When anchor presses this button trigger is given to monostable multivibrator. This quiz buzzer system has eight input pins corresponding to eight teams.

This Code is only visible to Registered users. This project deals with the control circuit for the switched mode power supply and is a combination of fasteest-finger-first microcontroller and a FPGA. I need a PCB layout of fastest finger first fastest-finger-frist without microcontroller.

It is build around microcontroller AT89C 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. Project Engineer 22 December The circuit presented here determines as to which of the four contestants first pressed the button and locks out the remaining three entries.

The oscillator frequency can be varied with the help of preset VR1.


The is an 8-bit microcontroller. These data lines are connected to port – 3 of microcontroller. The quiz buzzer systems are widely used in school, colleges and TV programs.

8 candidate quiz buzzer using 8051 microcontroller (AT89C51)

The quiz buzzer presented here takes care of the aforesaid problem. It is provided to anchor.

Door Sensor 19 December SPI Module of Arduino. Arduino based GPS receiver.

Electronic Projects: Fastest Finger First Mini Project using Microcontoller

Pulse Code Modulation – Engineering Project. Computer engineering is a discipline that integrates several fields of electrical engineering and computer science required to Output of rectifier contains pulsating dc which can be removed by use of filter circuit.

Fastest-finger-firet the system starts, the seven segment does not displays any output. Diodes 1N form the bridge rectifier. The conversion of ac to dc is achieved by rectifier supplied with ac signal using step down transformer.

The microcontroller keeps scanning the input pins. In many applications, it is necessary to supply constant dc voltage.