Kanpur - A city of many resources but politically neglected

Wednesday, November 3, 2010


AIM:- To make a LED Bulletin Board enabled with GPRS system and Microcontroller such that anyone having the no of that GPRS system can display any information from anywhere in India through his/her mobile phone.
Project is broadly divided into three parts.
i) LED display.:- A LED display is just a array  of leds connected together  and for the larger array i.e.120*14 we had to use 8 bit shit register with output latches(3 states) i.e. M54HC595 or   M74HC595

ii)Microcontroller unit for controlling the text to be displayed on the LED display(Atmega series microcontroller):-   The ATmega8 is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture.
By executing powerful instructions in a single clock cycle, the ATmega8 achieves throughputs approaching 1 MIPS per MHz, allowing the system designer to optimize power consumption versus processing speed.

iii)GPRS Tx(Mobile phone) And Rx(GPRS modem.):- rhydoLABZ's  GSM/GPRS Modem-RS232 is built with Tri-band GSM/GPRS engine, works on frequencies EGSM 900 MHz, DCS 1800 MHz and PCS 1900 MHz The Modem is coming with RS232 interface, which allows you connect PC as well as microcontroller. The baud rate is configurable from 9600-115200 through AT command. The GSM/GPRS Modem is having internal TCP/IP stack to enable you to connect with internet via GPRS. It is suitable for SMS, Voice as well as DATA transfer application in M2M interface.
The High quality aluminium enclosure enables you to use in rugged environmental conditions. The internal Switching Power supply allows you to connect wide range unregulated power supply. Using thi
modem, we can make audio calls, SMS, Read SMS and attend the incoming calls ect through simple AT command.
           The basic theory behind this project is that a GSM/GPRS Modem is device which is just like a mobile phone but is handled via a computer or a microcontroller unit. In this project a message received by the GSM/GPRS device will be given as a Input to the Rx And Tx port or USART port of the atmega series microcontroller most prefebly atmega8 and after that that digital data will be displayed on the LED array with the help of shift register. Programming for the display will be done with the help of embedded C and the compiler that would be used will be CVAvr.

The project will take approximately less than 2 month to be fully completed.
The total budget of the will be approx 8,000.

i)  It can act as a bulletin board displaying the necessary information send by any of the Faculty from any where.
ii) It will improve the technical status of the college that we are using digital notice board.
iii) If a speaker is attached to it a call can be made to it announcing any information.