10-01-2014, 12:23 PM
A Project Report On SMS BASED NOTICE BOARD
SMS BASED NOTICE .docx (Size: 1.19 MB / Downloads: 34)
ABSTRACT
Wireless communication has announced its arrival on big stage and the world is going mobile. We want to control everything and without moving an inch. This remote control of appliances is possible through Embedded Systems. The use of “Embedded System in Communication” has given rise to many interesting applications that ensures comfort and safety to human life.
The main aim of this project will be to design a SMS driven automatic display board which can replace the currently used programmable electronic display. It is proposed to design receiver cum display board which can be programmed from an authorized mobile phone. The message to be displayed is sent through a SMS from an authorized transmitter.
INTRODUCTION
We know that in today’s time there is a big problem regarding change the notice board of our power whole area get connected for days so it is give information any time. When the outside of the place. Keeping this point in our mind we are trying to develop a system which can send the message to any condition.
The data will be processed by the microcontroller on both ends.
PROJECT OBJECTIVE
This system is PIC microcontroller based project as PIC has inbuilt ADC , analog to digital converter so this ADC conversion is the basic principle of our project.
Since this project involves measuring the voltage and temperature and monitoring the level of coolant and taking the required decisions according to that.
Our main aim is to protect the grid from failure so keeping this in mind we have designed our project.
WORKING PRINCIPLE OF THE PROJECT
This is a very good project for college, police etc. This project has a moving message display, which can be used as the digital notice board, and also a GSM modem, which is the latest technology used for communication between the mobile and the embedded devices.
System will work like when the user wants to display or update the notice board, he have to sent the message in his mobile defining the messages and then the password of the system to the number of the sim which is inserted in the display system MODEM. Then the MODEM connected to the display system will receive the SMS, the microcontroller inside the system is programmed in such a way that when the modem receives any message the microcontroller will read the message form serial port and verify for the password, if the pass word is correct then it will start displaying the messages in the display system.
MICROCONTROLLER
Description
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 indus-try-standard 80C51 instruction set and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory pro-grammer. By combining a versatile 8-bit CPU with in-system programmable Flash on a monolithic chip, the Atmel AT89S52 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications. The AT89S52 provides the following standard features: 8K bytes of Flash, 256 bytes of RAM, 32 I/O lines, Watchdog timer, two data pointers, three 16-bit timer/counters, a six-vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator, and clock circuitry. In addition, the AT89S52 is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port, and interrupt system to continue functioning. The Power-down mode saves the RAM con-tents but freezes the oscillator, disabling all other chip functions until the next interrupt or hardware reset.
LED Materials:
One of the first materials used for LED is GaAs. This is a direct band gap material, i.e., it exhibits very high probability of direct transition of electron from conduction band to valence band. GaAs has E= 1.44 eV. This works in the infrared region.
GaP and GaAsP are higher band gap materials. Gallium phosphide is an indirect band gap semiconductor and has poor efficiency because band to band transitions are not normally observed.
Gallium Arsenide Phosphide is a tertiary alloy. This material has a special feature in that it changes from being direct band gap material.
Blue LEDs are of recent origin. The wide band gap materials such as GaN are one of the most promising LEDs for blue and green emission. Infrared LEDs are suitable for optical coupler applications.
CONCLUSION
The project was completed successfully with in the given time duration. it was learning experience through which we gained invaluable on hand practical knowledge with project enlightened us on the vastness and unique application of micro controller , which forms the basic framework of our project.
This project gave us the deep understanding of the controller and described us how to use the controller in different ways. This is embedded based project as embedded is the combination of both the software as well as the hardware so this system helped us to clear all our doubts related to basic electronic components