The document outlines a project on a wireless electronic notice board using GSM technology, developed by students of Kathford International College. It details the system's design, objectives, and technical components, including a microcontroller and GSM modem, allowing messages to be displayed in real-time via SMS. The project aims to improve notice dissemination efficiency in educational institutions while addressing the limitations of traditional paper-based methods.

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KATHFORD INTERNATTIONAL COLLEGE
BALKUMARI, LALITPUR
WIRELESS ELECTRONIC NOTICE BOARD
USING GSM TECHNOLOGY
Prepared by:
Bishnu lamichhane
Lokendra bdr. Jargha
Saban kumar kc
Sandesh pandit
Guided by:
Bipin Timilsina
AUGUST,2013

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CHAPTER1. INTRODUCTION
CHAPTER2. TECHNICAL DETAILS
CHAPTER3. SYSTEM DESIGN &
IMPLIMENTATION
CHAPTER4. EPILOUGE
PRESENTATION OUTLINE

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4. A BRIEF DISCRIPTION
WENB is wireless data transfer for quick display of
messages in real time.
Display SMS sent from Mobile phone
Multiuser can update notices by
sending SMS with password.
for a purpose of relying urgent
information
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5. OBJECTIVES
To display the message on display board
through SMS.
To effectively receive and transmit data via
SMS.
To eliminate the need of being physically
present to hangout the paper notices.
To provide reliable, authenticated ,user
friendly display system.
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6. MOTIVATION
Currently we rely on putting up notices on the
notice boards using papers.
Traditional display system should be reprogrammed
via software to display new messages.
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7. BLOCKDIAGRAM
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8. WORKING FLOW DIAGRAM
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10.  8-bit microcontroller
8KB on-chip Flash memory /ROM
256 bytes RAM
 3 timer/counters
one serial including receiver & transmitter buffer
four 8-bit parallel programmable ports.
AT89S52 ( Atmel )
10
Microcontroller-89S52

11. GSM MODEM –SIM300
11
12V ADAPTER LINE
ANTENNA
SIM
RS232 INTERFACE
NETWORKINDICATOR

12. AT COMMANDS
12
•AT+CMGD – to delete SMS
Syntax: AT+CMGD=1 -> deletes 1st sms in sim
card
•AT+CMGR – to read SMS
Syntax: AT+CMGR=1 -> reads 1st sms in sim
card
•AT+CMGS – to send SMS
Syntax: AT+CMGS=9849093784 press enter
Type text”HELLO” and press ctrl+z
AT commands are used to control MODEMs

13. MAX232
 It changes a TTL to RS232 Logic and vice versa. (TTL
Logic 0 to between +3 and +25 V) & (TTL Logic 1 to
between -3 to -25 V) 13

14. DISPLAY UNIT
LCD
 HD44780 LCD for displaying the text data
 16 character x 2 line display module
14

15. DISPLAY UNIT
15
5-DIGIT 5*7 LED MATRIX DISPLAY

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17. FLOW CHART
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ACEDEMIC LEVEL
DEMO DESIGNED
FOR
KATHFORD INTERNATIONAL COLLEGE

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SERVER MAN AS
MESSAGE
CONTROLLER
OTHERS
•TEACHERS
•STUDENTS
HOD SECTION
•BELX
•BCT
•BCL
PRINCIPLE
EXAM
SECTION
CRs LIBRARY
NOT
AUTHENTICATED

20. PRINCIPLE’S MESSAGE
HELLO STUDENTS
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WHEN AUTHENTICATD SENDER SENDS A
MESSAGE?
DEMO1:

21. LIBRARY’S MSG
BELX IV/II: QUESTION BANK IS READY
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DEMO2:

22. MSG FROM UNKNOWN
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WHEN UNAUTHENTICATD SENDER SENDS A
MESSAGE?
DEMO3:

23. BEST OF LUCK
23
DEMO4:

24. DESIGN AND SIMULATION
24

25. SCHEMATIC DIAGRAM OF
INTERFACING WITH 16*2 LCD
LCD
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SCHEMATIC DIAGRAM OF INTERFACING
WITH LED METRIX DISPLAY BOARD
3-8 DECODER
74LS138
4-16
DECODERS
74159
5*7
LEDMATRIX

27. Call control :
Data card Control :
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28. MERITS
User friendly : Messages are only to be typed
on a mobile
Eliminates use of printers : Since we don’t use
papers to display information
Faster means of transferring information :
There is no delay in transmission of information.
Long Range : As long as we have the required
network coverage we can send messages from
any part of the world.
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29. DE MERITS
 Dependent on signal strength : Messages
are not transmitted if there is weak network
coverage.
Volatile memory used for message storage
: Messages last only as long as power is ON.
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30. APPLICATIONS & USAGES
 Educational Institutions and
Organizations
 Advertisement
 Bus Stations
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31. FUTURE ENHANCEMENT
Currently in our project we are using onboard
RAM memory to save a single message. To
overcome this shortcoming we can interface an
EEPROM to save messages
The same principle can be applied to control
electrical appliances at a distant location.
Robots can be controlled in a similar fashion by
sending the commands to the robots.
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32. RESULT & CONCLUSION
 Hence, we are succeed to display the text
message .
 Reliable, Authenticated & User friendly
display system.
Finally, Project helped us to implement the
theoretical principles learned during the four
years course
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33. SNAPSHOT OF OUR SYSTEM
MICROCONTROLLER
89S52
RS232 INTERFACE
POWER SUPPLY
MAX232
GSM MODEM-SIM300
16*2 LCD DISPLAY
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34. SNAPSHOT OF OUR SYSTEM
MICROCONTROLLER
89S52
RS232 INTERFACE
POWER SUPPLY
MAX232
GSM MODEM-SIM300
16*2 LCD DISPLAY
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35. REFERENCES
 http://en.wikipedia.org/
 http://www.atmel.com/
 http://images.google.com/
 http://www.datasheetcatalog.com
 http://www.keil.com/forum/docs
 Datasheet: SIM 300 GSM MODEM Manual
 Datasheet: ATMEL 89S52 Microcontroller
 Datasheet: LCD HD44780
 Datasheet: MAX 232
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THANKYOU!