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04-06-2013, 04:06 PM
Post: #1
SMS Based Wireless Electronic Notice Board using GSM/CDMA/3G MOBILE PHONE ABSTRACT
SMS Based Wireless Electronic Notice Board using GSM/CDMA/3G MOBILE PHONE



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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-today 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.
Display is obtained on 20X4 LCD on a printed circuit board. 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 LCD 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 LCD 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 output of secondary of 230/12V step down transformer.
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Marked Categories : sms based wireless electronic notice board using gsm cdma 3g mobile phone, sms based wireless electronic notice board using cdma gsm 3g communication system, notice board site thesun co uk site times co uk,

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