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DESIGN AND CONSTRUCTION OF A FASTEST FINGER FIRST INDICATOR

 



BY
 
EGBUDIWE INNOCENT .N
EE/2007/181
 
BEING A PROJECT SUBMITTED IN PARTIAL FULFILMENT OF THE REQUIREMENT FOR THE AWARD OF BACHELOR OF ENGINEERING (B.ENG) DEGREE IN ELECTRICAL/ELECTRONIC ENGINEERING CARITAS UNIVERSITY, AMORJI-NIKE ENUGU.

   
AUGUST 2017
      

 

CERTIFICATION

This is to certify that this work was carried out by, EGBUDIWE .N. INNOCENT of the department of Electrical/Electronic Engineering, Caritas University Amorji-nike, Enugu.
 
___________________                                   Date: _____________

Engr. E.C. Aneke 

Project Supervisor

___________________                                  Date: ________________ 
Engr. C.O Ejimofor 
Head of Department
 
__________________                                   Date: ________________
External supervisor                                              
 

DEDICATION

The work is dedicated to the almighty God who with all his conglomerate efforts made my dream come true.


ACKNOWLEDGEMENT

My Profound gratitude goes to God Almighty who gave me good health and the strength throughout the period of this project. To my parents and siblings, I say a very big thank you for your financial and moral support during and after the completion of this project. 

My special thanks also go to my supervisor Engr. E.C Aneke and together with all other lecturers of the department.

 

ABSTRACT

This system 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. The main concept of this project is to develop a fastest-finger-first quiz buzzer which can be used to know the person who pressed the buzzer fast of all among a group of people.
The proposed system uses a D-flip-flop and a rectified power supply. In this system, 8-push button switches are interfaced to the circuit to provide input signals. A string of LEDs and piezo buzzer are connected to the circuit with the help of a transistor to give indication. A Quiz buzzer allows any user to press the switch to generate a logic signal, which is fed to the D-flip-flop. The flip-flop generates a corresponding O/P signal to trigger the transistor. The transistor activates the piezo buzzer to give an alert along with the indication of the switch pressed with the LEDs. Even if many switches are pressed at the same time, the D-flip flap – working as a priority encoder – takes into account the first switch pressed, for consideration.

 

 

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