Wireless-based Text Entry System for Handicap

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Electrical/Electronic Engineering Department

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ABSTRACT

Text entry system can be found commonly in modern computer and mobile devices

such as smartphone and tablet. Despite this, these text entry systems are not easily

accessible by handicaps. The major problem with the normal text entry system such as

the "QWERTY" keyboard, it would be very difficult for the handicaps to input the keys.

To use an ordinary keyboard, major hand movement is needed for them because the

keyboard contains over a hundred keys. They might have to move across the keyboard

to enter the desired keys. Hence, the usage of a keyboard for the handicaps is not

recommended especially for those who suffered from motor disabilities.

A new wireless-based text entry system is described in this research to help the

handicaps to ease their lives and input text faster. This new text entry system will be

much smaller than the traditional keyboard. In addition, this system would be designed

to be portable, lightweight, long operating hour and user-friendly. Besides, this system

enables the handicaps input text efficiently with minimum hand movement. Besides,

the handicaps will only require one hand to hold the equipment and one finger to

interact and to input text.

This equipment will be built using the Printed Circuit Board (PCB), the Arduino Uno

board (CT-UNO) and a Bluetooth module. PCB is used instead of using breadboard is

to keep the device with the minimum wires. Besides, the Bluetooth is used to ensure

the device can communicate to the computer wirelessly.

The algorithm used in this text entry system is Press-Drag-Release algorithm where the

user first pressed on the infrared text entry board, then the user drags the finger around

the board to choose the letter and then release. Next, the respective letters will be printed

on the computer. As a result, the user only needs to perform 3 steps to input a letter.

Apart from inputting letter to the computer, the text entry system is also a combination

of keyboard and mouse where the user can use the text entry system as a mouse and

navigate through the computer like the ordinary mouse.

The average entry rate of this text entry system is about 5 WPM. The result is better

than some of the system that designed for the handicapped.

TABLE OF CONTENTS

DECLARATION OF ORIGINALITY - - - - - - - - - - - - - - iv

ACKNOWLEDGEMENTS - - - - - - - - - - - - - - - - - . v

ABSTRACT - - - - - - - - - - - - - - - - - - - - - .. vi

TABLE OF CONTENTS - - - - - - - - - - - - - - - - - vii

LIST OF FIGURES - - - - - - - - - - - - - - - - - - - .. x

LIST OF TABLES - - - - - - - - - - - - - - - - - - - . xiv

LIST OF ABBREVIATIONS - - - - - - - - - - - - - - - - .. xv

CHAPTER 1: INTRODUCTION - - - - - - - - - - - - - - - . 1

1.1 Problem Statement and Motivation - - - - - - - - - - - - - - . 1

1.2 Background Information - - - - - - - - - - - - - - - - .. 2

1.2.1 Typewriter - - - - - - - - - - - - - - - - - - - .. 2

1.2.2 Standard 101/104 keys “QWERTY” keyboard - - - - - - - - - - 2

1.2.3 The 12-Key Keypad for Mobile Phone - - - - - - - - - - - - 3

1.2.4 Speech-to-Text - - - - - - - - - - - - - - - - - - . 4

1.3 Project Scope - - - - - - - - - - - - - - - - - - - . 5

1.4 Project Objective - - - - - - - - - - - - - - - - - - .. 5

1.5 What Have Been Achieved - - - - - - - - - - - - - - - - . 6

1.6 Impact, Significance and Contribution - - - - - - - - - - - - - . 6

1.6 Report Organization - - - - - - - - - - - - - - - - - - 7

CHAPTER 2: Literature Review - - - - - - - - - - - - - - - . 8

2.1 Text Entry System Based on a Minimal Scan Matrix for Severely Physically

Handicapped People - - - - - - - - - - - - - - - - - - - 8

2.1.1 The Design of the System - - - - - - - - - - - - - - - .. 8

2.1.2 Advantages and Disadvantages - - - - - - - - - - - - - - 9

2.1.3 Comparison with the proposed solution - - - - - - - - - - - .. 9

2.2 Using a Game Controller for Text Entry to Address Abilities and Disabilities Specific

to Persons with Neuromuscular Diseases - - - - - - - - - - - - - . 10

2.2.1 The Design of the System - - - - - - - - - - - - - - - 10

2.2.2 Advantages and Disadvantages - - - - - - - - - - - - - . 11

2.2.3 Comparison with the proposed solution - - - - - - - - - - - 11

2.3 BrailleKey: An alternative Braille text input system - - - - - - - - - .. 12

2.3.1 The Design of the System - - - - - - - - - - - - - - - 12

2.3.2 Advantages and Disadvantages - - - - - - - - - - - - - . 13

2.3.3 Comparison with the proposed solution - - - - - - - - - - - 13

2.4 An Ambiguous Keyboard Based on "Character Graphical Association" - - - - . 14

2.4.1 The Design of the System - - - - - - - - - - - - - - - 14

2.4.2 Advantages and Disadvantages - - - - - - - - - - - - - . 15

2.4.3 Comparison with the proposed solution - - - - - - - - - - - 15

2.5 Infrared-based Text Entry System for Handicap - - - - - - - - - - .. 16

2.5.1 The Design of the System - - - - - - - - - - - - - - - 16

2.5.2 Advantages and Disadvantages - - - - - - - - - - - - - . 18

2.5.3 Comparison with the proposed solution - - - - - - - - - - - 18

CHAPTER 3: System Design - - - - - - - - - - - - - - - - 19

3.1 System Overview - - - - - - - - - - - - - - - - - - .. 19

3.2 Full System Diagram - - - - - - - - - - - - - - - - - .. 19

3.3 Hardware Implementation - - - - - - - - - - - - - - - - 20

3.3.1 Flowchart of Hardware Implementation - - - - - - - - - - - .. 24

3.4 Software Implementation - - - - - - - - - - - - - - - - .. 25

3.4.1 Flowchart for Software Implementation - - - - - - - - - - - .

📄 Pages: 101 🧠 Words: 10682 📚 Chapters: 6 🗂️️ For: PROJECT

👁️‍🗨️️️ Views: 608

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