A presentation on GSM-based E-Notice Board

1. PRESENTED BY:
CHETNA CHAURASIA
RITIKA CHAUHAN
MD. AAZAM ALI
ROHIT SARTHI
GUIDED BY:
Mr. RAM KRISHNA DEWANGAN

2.  Moving LED Display is very active application of digital electronics. The
application of this device can be found everywhere.
 The use of “Embedded System in Communication” has given rise to many
interesting applications.
 One of such applications is public addressing system (PAS).
 Many companies are manufacturing audio / video systems like public
announcement system, CCTV, programmable sign board’s etc.
 Now-a-days LED Message Scrolling Displays are becoming very popular .These
displays are used in shopping malls, theaters, public transportation, traffic signs,
highways signs, etc.

4.  Presently almost all electronic notice boards are designed using wired system.
 One of the drawbacks of the design is the system is inflexible in term of
placement.
 The common notice board cannot be placed anywhere because of the messy wire.
 The aim of this project is to develop a wireless notice board that will be used at the
faculty in order to display latest information.
 This wireless notice board project mainly focuses on transmission of textual data
through air interface by the use of GSM through asynchronous serial
communication.
 Actually what happens is, sending SMS through phone has become very popular
and if we can use this SMS to control devices and in displaying data.
 It is possible to receive or decode the SMS globally by using GSM, by the any
part of world we can control and display data on LED board.

6.  The ENB mainly consists of a GSM receiver and a display toolkit which can be
programmed from an authorized mobile phone.
 It receives the SMS, validates the sending Mobile Identification Number (MIN)
and displays the desired information after necessary code conversion.
 It can serve as an electronic notice board and display the important notices
instantaneously thus avoiding the latency.
 Being wireless, the GSM based board is easy to expand and allows the user to
add more display units at any time and at any location in the campus depending
on the requirement of the institute.

10.  Micro controller ATMEGA16
 74HC595 Shift registers
 74HC154 4:16 decoders
 SIM300 GSM Modem
 Voltage regulator-7805
 ULN2003A
 5V & 12 V DC Power supply
 LED (Light emitting diode) display matrix

11.  ATmega16 is an 8-bit high performance microcontroller of Atmel’s Mega AVR
family with low power consumption.
 Atmega16 is based on enhanced RISC architecture with 131 powerful instructions.
 Atmega16 can work on a maximum frequency of 16MHz.
 ATmega16 has 16 KB programmable flash memory, static RAM of 1 KB and
EEPROM of 512 Bytes, endurance cycle of flash memory and EEPROM is 10,000
and 100,000, respectively.
 ATmega16 is a 40 pin microcontroller.
 There are 32 I/O (input/output) lines which are divided into four 8-bit ports
designated as PORTA, PORTB, PORTC and PORTD

12. o A GSM modem is a wireless modem that
works with a GSM wireless network .
o Like a GSM mobile phone, a GSM modem
requires a SIM card from a wireless carrier in
order to operate.
o GSM SIM300 Modem can accept any GSM
network operator SIM card and act just like a
mobile phone with its own unique phone
number.
o Advantage of using this modem will be that
you can use its RS232 port to communicate
and develop embedded applications.
o Applications like SMS Control, data transfer,
remote control and logging can be developed
easily.

13.  Our existing system comprises of the GSM based Electronic notice board and we
are extending this system to a device which is capable of converting the text
message it receives into audible speech.
 The remaining process is same as it was but the only difference is that the
message being displayed is audible to us.
 This new extension in the system is much convenient & useful for us.
 All the circuitry is same as it was; the only addition is the external circuit we are
interfacing with the existing system.
 The processing of the message received via GSM is same.
 After the processing, the message input is provided to our extension circuitry.
 The extension circuitry converts the input message into speech which is provided
to the speaker attached to it.
 Through the speakers the message is audible to the people.

14.  Text-to-speech conversion involves both textual analysis and speech synthesis in
real time.
 Today, the number of text-to-speech applications has grown substantially, and
software applications have become increasingly sophisticated.
 A text-to-speech system (or "engine") is composed of two parts: a front-end and
a back-end .
 First, it converts raw text containing symbols like numbers and abbreviations into
the equivalent of written-out words.
 This process is often called text normalization, pre-processing, or tokenization .
 The front-end then assigns phonetic transcriptions to each word, and divides and
marks the text into prosodic units, like phrases, clauses, and sentences.

17.  Arduino
 Magnevation SpeakJet
 TTS256 text-to-speech processor
 LM386N amplifier IC
 .01uF capacitors
 .1uF capacitor
 10uF electrolytic capacitor
 100uF electrolytic capacitor
 10K resistor
 27K resistors
 10K potentiometer (set to approx. middle of range to start)

18.  The TTS256 is an 8-bit microprocessor
programmed with 600 letter-to-sound
rules for the
automatic, real-time translation of
English text to allophone addresses.
 Combined with the Magnevation
SpeakJet, the TTS256 makes a complete
text-to-speech solution.
 The TTS256 will read English words,
numbers, currency, time, mathematical
expressions and some punctuation
characters.
 The TTS256 is exclusively designed to
function with a Magnevation SpeakJet
and will not produce speech without one.

19.  Arduino is an open-source platform used for buliding electronics projects.
 It consists of both a physical programmable circuit board and a piece of software
that runs of the computer, used to write and upload computer code to the
physical board.
 The Arduino hardware & software was designed for artists, designers, hobbyists,
hackers, newbies, and anyone interested in creating objects or environments.
 It can interact with buttons, LEDs, motors, speakers, GPS units, cameras, the
internet and even smartphones.
 All Arduino boards are completely open-source, empowering users to build them
to their particular needs.
 The Arduino Software (IDE) runs on Windows, Macintosh OSX, and Linux
operating systems.

20.  The prototype of the GSM based display toolkit was efficiently designed.
 This prototype has facilities to be integrated with a display board thus making it truly
mobile.
 The toolkit accepts the SMS, stores it, validates it and then displays it in the LED
module.
 The SMS is deleted from the SIM each time it is read, thus making room for the next
SMS.
 LED-based moving-message displays are becoming popular for transmitting
information to large groups of people quickly.
 We can use this Project in college Notice Board, a Professor can send message for the
immediate gathering of students at department.

21.  The use of microcontroller in place of a general purpose computer allows us to
theorize on many further improvements on this project prototype.
 Another very interesting and significant improvement would be to accommodate
multiple receiver MODEMS at the different positions in a geographical area
carrying duplicate SIM cards.
 Multilingual display can be another added variation of the project.
 This feature can be added by programming the microcontroller to use different
encoding decoding schemes in different areas as per the local language.
 This will ensure the increase in the number of informed users.

22.  As we know that every system has its limitations, so as this project.
 This system is unable to process numeric only, so it cannot display it.
 It processing is fully dependent on the cellular network; if network fails, so as this
system.
 Its power supply is DC, but the main base is AC. So , if power cuts then this system
also stops functioning.
 The text converted to the speech is not so good in quality.