This project helps in simplifying the process of learning of braille instructions. The integration of physical activity and hearing can facilitate easy learning of Braille Script. In this project we develop a kit which helps the blind and visually impaired people to learn braille even in the absence of teachers.
Braille literacy is crucial for blind individuals, as it enables life-long learning and is key to employment and independency. One way to promote Braille literacy is to make existing Braille reading devices more accessible, affordable, and user friendly. Commercially available Braille reading devices in this regard need various improvements. Most of these devices cost thousands of dollars, mainly because they rely on multiple piezoelectric actuators in order to create the Braille letters.
Other issues include high voltage actuation and reduced portability. In order to solve these issues and improve existing Braille displays, various actuation methods have been widely investigated.285 million people are estimated to be visually impaired worldwide, 39 million are blind and 246 have low vision. India has the largest population of blind people in the world. That's over 12 million people. Even the central and state government provide job opportunities for blind and visually impaired people. But only few vacancies are filled due to lack of education. Lack of education for blind people is due to the lack of qualified teachers to teach them Braille. Learning the Braille script is not an easy task for Visually Impaired students. Visually Impaired students have to memorize various patterns of keys of Braille matrix assigned for different letters/words/symbols in Braille script to read and write effectively.
Inhalt
LIST OF FIGURES
LIST OF TABLES
CHAPTER 1
1.1 BLOCK DIAGRAM
1.2 ABOUT BARILLE
1.3 BRAILLE STRUCTURE
1.4 IMPORTANCE OF BRAILLE
1.5 BRAILLE IN DAY TO DAY LIFE
1.6 BRAILLE SYMBOLS
1.6.1 THE BRAILLE ALPHABET
CHAPTER 2 LITERATURE SURVEY
CHAPTER 3 HARDWARE DESCRIPTION
3.1 Raspberry Pi 3 Model B
3.1.1 PINDIAGRAM
3.2 SOLENOID ACTUATOR
3.3 TRANSISTOR TIP122
3.4 DIODE 1N4007
3.5 RESISTOR 1K
CHAPTER 4 POWER SUPPLY DESCRPITION
4.1 7812 REGULATOR
4.2 CAPACITOR 470uF
4.3 TRANSFORMER
4.4 REGULATED POWER SUPPLY WORKING
4.4.1 THE POSITIVE HALF-CYCLE
4.4.2 THE NEGATIVE HALF-CYCLE
CHAPTER 5
5.1 CIRCUIT DIAGRAM OF CONTROL UNIT
5.2 CIRCUIT EXPLANATION
5.2.1 OPEN CIRCUIT CONDITION OF SOLENOID ACTUATOR
5.2.2 CLOSED CIRCUIT CONDITION OF SOLENOID ACTUATOR
5.3 CIRCUIT DIAGRAM OF POWER SUPPLY
5.3.1 IC 7812
5.3.2 CAPACITOR
CHAPTER 6 TEXT TO VOICE SYTHESIS
6.1 INTRODUCTION
6.2 SOFTWARE PACKAGES
6.2.1 FESTIVAL
6.2 2 FLITE
6.2.3 Espeak
6.3 AUDIO CONFIGURATION
6.3.1 DESKTOP VOLUME CONTROL
6.3.2 COMMAND LINE
6.3.3 RASPI-CONFIG
6.4INSTALLATION FLITE PACKAGAE
CHAPTER 7 TECHNICAL CHANLLENGES ENCOUNTERED DURING THE BRAILLE SYSTEM DESIGN
7.1 POWER SUPPLY DESIGN
7.2 BRAILLE CHARACTER SIZE
7.3 ADVANTAGES OF THE BRAILLE KIT
CONCLUSION
APPENDIX
REFERENCE
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