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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The output is displayed on a 16×2 liquid crystal display LCD. The conversion of ac to dc is achieved by rectifier supplied with ac signal using step down transformer.

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Fastest Finger First Indicator

fzstest-finger-first Interface SD Card with Arduino. It can show 16 characters in 1st line and 16 characters in 2nd line. At times it becomes very difficult to identify which team has pressed the button when two teams press the buzzer within fastest-finger-fjrst very small time gap. The person who knows the answer hits the buzzer first and then answers the question.

It is build around microcontroller AT89C Internship — Image Processing Engineer 27 December Eight pins of port P2 of the microcontroller are corresponding to eight inputs and one stop pin fastest-ifnger-first resetting the buzzer system. For this reason buzzer rounds are avoided for quiz contest held in colleges. When anchor presses this button trigger is given to monostable multivibrator. This Code is only visible to Registered users. There is a wide range of cheap low-voltage motors available, run Choosing Motor For Robots.


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.

Thursday, August 22, Here we are using 16X2 LCD display. Polling method is used instead of interrupting the microcontroller, by using IC — as monostable multivibrator Timer.

The generation of pressure variation or It is build around microcontroller AT89C Awesome Timer IC Projects. More interesting projects available here. Log into fastest-finge-first account.

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The combinational circuitry comprising dual 4-input NAND gates of IC3 locks out subsequent entries by producing the appropriate latch-disable signal. Monostable multivibrator acts as a timer. Monostable multivibrator and inverter. It is the cheapest IC, within family of microcontroller series.

The quiz buzzer systems are widely used in school, colleges and TV programs. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. Power Bank for Smartphones.

When the system starts, the seven segment does not displays any output. The circuit presented here determines as to which of the four contestants first pressed the button and locks out the remaining three entries.

A buzzer is also sounded for a small duration to give an acoustic alarm. The team which presses the buzzer earliest is entitled to give the answer. On the output side a seven segment is connected to display the corresponding output number.

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Electronic Projects: Fastest Finger First Mini Project using Microcontoller

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. A resource for professional design engineers.

This provides better way to display numbers and avoids conflict with contestant after the end of 15 sec. The system uses 89C51 microcontroller for controlling all the activities.

When the system starts, the ksing segment does not displays any output. With a slight modification, this circuit can accommodate more than four contestants. Potential Risks of Artificial Intelligence 18 December The seven segment displays the number corresponding to the input pressed. If any posts here are hitting the copyrights of any publishers, kindly contact, it will be removed as soon as possible.

It is provided to anchor. A seven segment display is the most basic electronic display device that can display digits from It works on 5V supply. Useful Raspberry Pi Projects.

Gases like LPG, butane and propane ar These data lines are connected to port – 3 of microcontroller. This quiz buzzer disables the other inputs as soon as the first buzzer is pressed. Priority encoder IC4 encodes the active-low input condition into the corresponding binary coded decimal BCD number fastest-finger-tirst. Transformer can provide upto mA current.