Fastest Finger Fast Indicator

 

  FASTEST FINGER FIRST INDICATOR  Ab  A bstr act Now a days quiz-type game shows are increasingly becoming popular on television. In such quiz games,

 fastest finger first indicators (FFFIs) are used u sed to test the contestant’s reaction time. We present this project

 for a 2-team quiz game, that determines which team first pressed the button and locks out the entry of the will glow, when when the player presses his entry button. other team. Simultaneously, a LED of the respective team will

Introduction In the buzzer round of quiz contests, the t he question is thrown open to all the tea teams. ms. The person who knows the answer hits the buzzer first and then answers the question. Sometimes two or more players hit the buzzer almost simultaneously and it is very difficult to detect which of them has pressed the buzzer first. In television shows, where the whole event is recorded, the actions are replayed in slow motion to detect the first hit. Such slow motions are possible only where huge funds are available to conduct the show. For this reason buzzer rounds are avoided for quiz contests held in colleges. This project is an electronic quiz buzzer that is affordable by the colleges and even individuals. We present this project for a 2-team quiz contestant, although it can be modified for more number of teams. The circuit can detect and record the t he first hit contestant among all the contestants contestants..

Components   ●  ●  ● 

2 × NE555 ICs  2 × LEDs (different colors)   3 × Momentary push buttons  4 × 10K ohm Resistors 

  ●  ●  ●  ● 

2 × 1K ohm Resistors  2 × 100 ohm Resistors  1 ×  1F Capacitor   2× 0.1F Capacitors  2× IN4007 Diodes 

●

●

Block Diagram

 

  Figure 1: Schematic diagram of Fastest Finger Fast Indicator Circuit.

Figure 2: Block diagram of NE555 IC Timer

Working Principle

 

Fastest finger first indicators (FFFIs) are used to test the player’s reaction time. The LED of the respective  player’s will glow, when the player presses his entry button. The circuit circuit presented here determines as to which contestant first pressed the t he button and locks out the other contestant. The circuit consists of two  two  555 timer bistables bistables  which are triggered or reset when their inputs are low. Their reset inputs are connected together and operated by a single reset push-switch. The trigger switches are connected to the bistable trigger (pin 2) through a 0.1µF capacitor so that only the initial press triggers the  bistable; continuing to hold the switch switch closed will have no effect. This is called called  edge triggering. triggering.  Connecting the switch directly to the bistable would prevent the t he quizmaster from resetting the circuit until the trigger switch was released and trials t rials showed that many contestants kept the switch pressed until asked to give their answer! When triggered the bistable output (pin 3) lights an LED and makes the 'trigger line' high - this  prevents any other bistable being triggered. triggered. A diode is used to link the outpu outputt to the trigger line.

Applications: 1.  In Quiz Competitions 2. Entertainment purpose 

Conclusion In the buzzer round of any quiz contest question are thrown open to all the participating tea teams. ms. After hearing the question any member of a team t eam who knows the answer and hits there switch first gets a chance to answer. In multiple cases who hit the switch first gets the opportunity to reply. For next round the quiz master reset the buzzer operation circuit by pressing the reset switch. For visual indication all teams have the lamp fitted on their desk. The lamps glow until the reset of buzzer controller indicating the eligible team for replying the question.