SMS BASED WIRELESS ELECTRONIC NOTICE BOARD USING GSMCDMA3G MOBILE PHONE (Electronic project)

SMS BASED WIRELESS ELECTRONIC NOTICE BOARD USING GSM/CDMA/3G MOBILE PHONE

TECHNICAL SPECIFICATIONS:

Title of the project                  :           SMS based Wireless Electronic Notice Board                   

                                                             Using GSM/CDMA/3G Mobile Phone

Domain                                   :           Embedded Systems Design

Software                                 :           Embedded C, Keil, Proload

Microcontroller                       :           AT89S52

Power Supply                          :           +5V, 500mA Regulated Power Supply

Display                                    :           LED Matrix Display

Crystal                                     :           11.0592MHz

Communication Device          :           CDMA/GSM Modules

Input                                       :           CELL PHONE

Applications                            :           Colleges, Schools, offices, public utility places,

  

ABSTRACT:

Notice Board is primary thing in any institution / organization or public utility places like bus stations, railway stations and parks. But sticking various notices day-to-day is a difficult process. A separate person is required to take care of this notices display. This project deals about an advanced hi-tech wireless notice board.

The project is built around the AT89S52 micro controller from Atmel. This micro controller provides all the functionality of the display and wireless control. It also takes care of creating different display effects for given text.

Matrix type display is designed using 5mm LED on a printed circuit board. A driver circuit is designed to drive all these LEDs. A GSM/CDMA Mobile Can is used to enter the required text or notice. The scrolling speed of the text also can be changed according to user requirement.

                                

After entering the text the SMS is sent to the no which is connected to the LED display. At any time the user can add or remove or alter the text according to his requirement.

At the receiving end the GSM modem which is connected to the Max 232 receives the message and is connected to the microcontroller AT89S52. The message which is already stored in the EEPROM is displayed on the LED Display.     

This project uses regulated 5V, 500mA power supply. 7805 three terminal voltage regulator is used for voltage regulation. Bridge type full wave rectifier is used to rectify the ac out put of secondary of 230/12V step down transformer.

BLOCK DIAGRAM:

Advantages:

• Wireless System
• Text can be entered from remote place
• Data will not be lost in power failure condition

Applications:

• Offices, educational institutions, bus stations, railway stations and other public utility places