fastest finger identifier for 4 participants in Quiz

SPECIFICATIONS

Title of the project                :           Quiz controller (fastest finger identifier for 4 participants)

Domain                                   :           Embedded Systems Design

Software                                 :           Assembler, Proload

Microcontroller                     :           89S52  Micro Controller

Power Supply                         :           +5V, 500mA Regulated Power Supply

Display                                    :           a) LCD,  HD44780 16-character, 2-line (16X2)

                                                             b) LED             5mm

Crystal                                     :           11.0592MHz

Sensors                                   :           Tactile switches

Applications                           :           Homes, offices, shops etc

ABSTRACT

Quiz is increasingly becoming popular on television these days. In such games, fastest finger first indicators (FFFIs) are used to test the player’s reaction time. The player’s designated number is displayed with an audio alarm when the player presses his entry button. The circuit presented here determines as to which of the four contestants first pressed the button and locks out the remaining three entries. Simultaneously, an audio alarm and the correct decimal number display of the corresponding contestant are activated. When more than one contestant presses their switches the software identifies who presses it first and the corresponding team is given chance. 

BLOCK DIAGRAM