digital notice board
DESCRIPTION
TRANSCRIPT
![Page 1: Digital Notice Board](https://reader033.vdocuments.us/reader033/viewer/2022061222/54c157144a7959c16a8b4582/html5/thumbnails/1.jpg)
Prepared by,
G.RAMA KRISHNA(10BQ1A0422),B.BALA CHAITANYA(11BQ5A0402),K.ARUN KUMAR(10BQ1A0442).
Guided by,KRISHNA PRASAD SATAMRAJU
Asst. Prof
MULTI-NOTICE DISPLAY BOARDS USING GSM
![Page 2: Digital Notice Board](https://reader033.vdocuments.us/reader033/viewer/2022061222/54c157144a7959c16a8b4582/html5/thumbnails/2.jpg)
OBJECTIVE Notice Board is primary thing in any institution
or 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 a micro controller which provides all the functionality of the display and wireless control. Display is obtained on LCD
The advantage of this project being low cost and low power consumption
![Page 3: Digital Notice Board](https://reader033.vdocuments.us/reader033/viewer/2022061222/54c157144a7959c16a8b4582/html5/thumbnails/3.jpg)
BLOCK DIAGRAM
NOTICE BOARD B20 X 4 LCD
AT 89S52
MICRO CONTROLLER
NOTICE BOARD A
20 X 4 LCD
POWER SUPPLY
GSM
![Page 4: Digital Notice Board](https://reader033.vdocuments.us/reader033/viewer/2022061222/54c157144a7959c16a8b4582/html5/thumbnails/4.jpg)
MODES OF OPERATION
› SEND MESSAGE TO NOTICE BOARD A
› SEND MESSAGE TO NOTICE BOARD B
› SEND MESSAGE TO BOTH NOTICE BOARDS
![Page 5: Digital Notice Board](https://reader033.vdocuments.us/reader033/viewer/2022061222/54c157144a7959c16a8b4582/html5/thumbnails/5.jpg)
MICROCONTROLLER AT89S52 The AT89S52 is a low-power, high-performance CMOS 8-bit
microcontroller with 8K bytes of in-system programmable Flash memory.
The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry- standard 80C51 instruction set and pinout.
FEATURES 8K Bytes of In-System Programmable (ISP) Flash Memory Endurance: 1000 Write/Erase Cycles 4.0V to 5.5V Operating Range 256 x 8-bit Internal RAM 32 Programmable I/O Lines Full Duplex UART Serial Channel Fully Static Operation: 0 Hz to 33 MHz
![Page 6: Digital Notice Board](https://reader033.vdocuments.us/reader033/viewer/2022061222/54c157144a7959c16a8b4582/html5/thumbnails/6.jpg)
MICROCONTROLLER AT89S52 PIN DIAGRAM
![Page 7: Digital Notice Board](https://reader033.vdocuments.us/reader033/viewer/2022061222/54c157144a7959c16a8b4582/html5/thumbnails/7.jpg)
20 X 4 LCD DISPLAY
VVIT PROJECT REVIEWS
![Page 8: Digital Notice Board](https://reader033.vdocuments.us/reader033/viewer/2022061222/54c157144a7959c16a8b4582/html5/thumbnails/8.jpg)
GSM MODEM A GSM modem is a wireless
modem that works with a GSM wireless network.
It operates at either the 900MHz or 1800MHz frequency band.
It supports voice calls and data transfer speeds of up to 9.6kbits/s, together with the transmission of SMS (Short Message Service).
The GSM Modem comes with a serial interface which the modem can be controlled using AT command interface.
![Page 9: Digital Notice Board](https://reader033.vdocuments.us/reader033/viewer/2022061222/54c157144a7959c16a8b4582/html5/thumbnails/9.jpg)
AT COMMANDS
![Page 10: Digital Notice Board](https://reader033.vdocuments.us/reader033/viewer/2022061222/54c157144a7959c16a8b4582/html5/thumbnails/10.jpg)
INTERFACING WITH MAX 232
![Page 11: Digital Notice Board](https://reader033.vdocuments.us/reader033/viewer/2022061222/54c157144a7959c16a8b4582/html5/thumbnails/11.jpg)
MAX 232
![Page 12: Digital Notice Board](https://reader033.vdocuments.us/reader033/viewer/2022061222/54c157144a7959c16a8b4582/html5/thumbnails/12.jpg)
MAX 232 IC
• MAX 232 that converts signals from an RS-232 serial port to signals suitable for use in TTL compatible digital logic circuits.
• The MAX 232 is a dual driver/receiver and typically converts the RX, TX CTS and RTS signals.
• It changes a TTL Logic 0 to between +3 and +15 V, and changes TTL logic 1 to between -3 to -15V, and vice versa for converting from RS232 to TTL.
![Page 13: Digital Notice Board](https://reader033.vdocuments.us/reader033/viewer/2022061222/54c157144a7959c16a8b4582/html5/thumbnails/13.jpg)
APPLICATIONS:
The Campus Display System is aimed at the colleges and universities for displaying day-to-day information continuously or at regular intervals during working hours. Display devices can be setup at various places in the campus.
Being GSM-based system, it offers flexibility to display flash news or announcements faster than a programmable system.
GSM-based campus display system can also be used at other public places like schools, hospitals, railway stations, gardens etc. without affecting the surrounding environment.
![Page 14: Digital Notice Board](https://reader033.vdocuments.us/reader033/viewer/2022061222/54c157144a7959c16a8b4582/html5/thumbnails/14.jpg)
================================================
================================================
THANK YOU