Hardware Based Braille Note Taker
Contents
1. easy as a single line of code Vss Vec VEE RS RM E DBO DB1 DB2 DB3 DB4 DBS DB DBT Fig 5 LCD Display IV AT COMMAND SET The following section describes the AT Command set The commands can be tried out by connecting a GSM modem to one of the PC s COM ports Type in the test command adding CR LF Carriage return Line feed r n before executing Table gives an overview of the implemented AT Commands in this application The use of the commands is described in the later sections AT Command set overview Check if serial interface and GSM AT modem is working Turn echo off less traffic on serial ATEO line AT CNMI Display of new incoming SMS AT CPMS Selection of SMS memory SMS string format how they are AT CMGF compressed Read new message From a given AT CMGR memory location AT CMGS Send message to a given recipient V RESULT AND DISSCUSSION V A RESULT 1 To detect a pressed key the microcontroller grounds all rows by providing O to the output latch and then it reads the columns However if one of the column bits has a zero this means that a key press has occurred After a key press is detected the microcontroller will go through the process of identifying the key Starting with the top row the microcontroller grounds it by providing a low to row DO only then it reads the columns In our system keypad works satisfactorily as per the functions given to it 2014 IJERMT All Rights Reserved Page 28 Gaik2. the same dots pattern in a different position many Braille characters have different meanings based on their context Therefore character mapping is not one to one 2014 IJERMT All Rights Reserved Page 25 Gaikwad et al International Journal of Emerging Research in Management amp Technology ISSN 2278 9359 Volume 3 Issue 6 EIE ENEE EEEE EIEN EAE EEEE TNE Capital Letter follows Number follows Read Command Delete Command Fig 2 2 Braille code for Special Commands eo e xclamation point Full stop Comm a E E Double Inverted Commas Fig 2 3 Braille code for Punctuation The Basic ideal to design a SMS system for blind person came in our mind after reading the following two IEEE papers 1 Hardware software complex Dashpoint for learning and communication of deaf blind people year 2011 2 E mail Client having Articulation and Braille Transcription of E mails for the Blinds year 2010 Il OBJECTIVE The main objective of the project is to create a low cost economical SMS system which is accessible by visually impaired person 2014 IJERMT All Rights Reserved Page 26 Gaikwad et al International Journal of Emerging Research in Management amp Technology ISSN 2278 9359 Volume 3 Issue 6 HI BLOCK DAIGRAM CONTROLLE BRAILLE KEYPAD Fig 1 Block Diagram In this system the message re
3. International Journal of Emerging Research in Management amp Technology Research Article June ISSN 2278 9359 Volume 3 Issue 6 2014 Hardware Based Braille Note Taker Ms Varsha V Gaikwad Prof R M Khaire Dept of Electronics Engg Dept of Electronics Engg Bharati Vidyapeeth s college of Engg Pune Bharati Vidyapeeth s college of Engg Pune ABSTRACT Due to the lack of vision the blind people cannot easily access the latest information and the technologies which can provide them an alternating communication expertise Modern technological enhancements cannot be easily affordable to the visually impaired people because of their higher cost and the less portability That is why it has become pretty necessary to develop a low cost portable and a fast Braille System for the visually impaired people This paper introduces a new communication channel for the deaf blind and visually impaired people which consist of three different subsystems providing different facilities to improve the communication skill of the visually impaired people The system consists of the following three modules i a portable low cost refreshable Body Braille system for displaying Braille characters using six micro vibrators ii an easy Braille writer for writing the Braille characters and iii a remote communication system through SMS This new communication system is cheap portable fast and accurate Keywords I INTRODUCTION Mobile phone is a ve
4. and write through electronic media The system will be very user friendly to these people REFERENCES 1 MikroElektronika EasyARM v6 user manual 2 MikroElektronika EasyARM v7 user manual 3 http www datasheetarchieve com 4 Keil RK 1159 development Board for LPC2148 2014 IJERMT All Rights Reserved Page 29
5. ceived from the GSM modem using SIM 300 Every incoming message is indicated by external vibration motor using vibration The every single message collecting in the arm processor will be display on LCD display Braille board and voice output Here LCD is used for user except blind people but output message from the audio is used for blind and dumb people Braille output and audio output can be used by the blind people ILA SMS SEND The steps required to send the messages from device are as shown below Type SMS through Braille pad Send to controller Convert to English Display on LCD and make echo on Braille pad Transmit to GSM modem and send message End Fig 2 Flowchart for sending SMS II B SMS READ The steps required to read the messages from device are as shown below Initialize GSM module Wait for SMS YES Transmit to ARMI Display on Braille pad Fig 3 Flowchart for reading SMS 2014 IJERMT All Rights Reserved Page 27 Gaikwad et al International Journal of Emerging Research in Management amp Technology ISSN 2278 9359 Volume 3 Issue 6 Fig 4 GSM Module II C Liquid Crystal Displays LCD An LCD is a small low cost display It is easy to interface with a micro controller Because of an embedded controller the black blob on the back of the board This controller is standard across many displays HD 44780 which means many Micro controllers have libraries that make displaying Messages as
6. ngle cell patterns There are a number of different versions of Braille Grade 1 This grade consists of the 26 standard letters of the alphabet and punctuation It is only used by people who are first starting to read Braille Grade 2 This grade consists of the 26 standard letters of the alphabet punctuation and contractions The contractions are employed to save space because a Braille page cannot fit as much text as a standard printed page Books signs in public places menus and most other Braille materials are written in Grade 2 Braille Grade 3 This grade is used mainly in personal letters diaries and notes and also in literature to some extent It is a kind of shorthand with entire words shortened to a few letters ILA I Braille Code Braille can be seen as the world s first binary encoding scheme for representing the characters of a writing system The system as originally invented by Braille consists of two parts A character encoding for mapping characters of the French language to tuples of six bits or dots A way of representing six bit characters as raised dots in a Braille cell Today different Braille codes or code pages are used to map character sets of different languages to the six bit cells Different Braille codes are also used for different uses like mathematics and music However because the six dot Braille cell only offers 63 possible combinations 2 1 63 of which some are omitted because they feel the same having
7. ry useful invented technology Today all the people are used mobile phones for their conveniences The mobile phone is a very good and very useful technology for communication Using mobile phone communicating with friends and families from anywhere to all over in the world is possible By calling or sending messages from mobile phone we can easily able to connect with others Now a day s SMS short message service is the most useful application Today 80 of mobile phone users are use this data facility But the visually impaired people cannot able to use this facility In this paper the visually impaired people can read message using mobile phone and also this system help the blind people to send acknowledgment for the current incoming messages This will be implemented by interfacing the Braille system with mobile phone Louise Braille is the father of Braille system This system is a widely used system with the help of this system all the blind peoples for reading and writing like a normal people ILA BRAILLE LANGUAGE Braille is writing system which enables blind and partially sighted people to read and write through touch It was invented by Louis Braille 1809 1852 who was blind and became a teacher of the blind It consists of patterns of raised dots arranged in cells of up to six dots in a 3 x 2 configuration Each cell represents a letter numeral or punctuation mark Some frequently used words and letter combinations also have their own si
8. wad et al International Journal of Emerging Research in Management amp Technology ISSN 2278 9359 Volume 3 Issue 6 2 On the output side the ULN2803 is generally rated at 50V 500mA so it can operate small loads directly In electrical terms the ULN2803 uses the low level TTL signal to switch on turn off the higher voltage current signal on the output side The relays are energized and toggled up and down as per the instructions given to it 3 Thus our system enables the blind persons to access the SMS in their mobiles anytime anywhere in a very low cost V B DISCUSSION V B 1 Advantage 1 Quick response time The I O toggling time is 3 times faster than 8051 microcontroller So the system has quick response time 2 Low power requirement LPC 2148 consumes 100uA current in power down mode and 12mA current ISP mode It requires only 3 3V for its operation 3 Fully automated and robust system V B 2 Disadvantages 1 Lengthy process As it reads character by character so it is a bit lengthy process 2 Handy System As the system is somewhat handy it is not portable VI CONCLUSION Thus the system we have designed is useful for blind and or deaf person to access mobile SMS system These people can send and receive the SMS as normal person It is easy to use system by blind people as it uses Braille language It is a low cost device and can be modified as a portable product By using such type of devise blind people will be enabled to read
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