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Prof. Subhransu Sekhar

panda

(ECE department)


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( p )

Team Members :-


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Reasons for choosing thisproject :-

Object ive of this pro ject is to c ontro l our home app l iance

from remo te area.

There are many home w ireless based devices forcon tro l l ing processes, bu t they are more expensive.

So here we are us ing all the basic components that are

used in ou r dai ly l i fe l ike cel l phones, Sim card, GSM modemetc which make our p roject cheaper and very simple to use.


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Project details :-

Aim of the project Is to develop a system based onEmbedded micro controller ,which is used for controlling variousappliances at home using GSM network and which provides asecurity feature.

The major hardware interfaces to micro controller are LCDdisplay and a modem(GSM).Also the appliances are interfaced to

the micro controller that are to be controlled.

A serial driver IC is used for serial data transmission.


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Block diagram :-

Appliance 1

AT89C51

MicroController

Display Unit

Powersupply unit

GSM

modemRelay2

Relay 1

Appliance 2

RELAY

DRIVER

Serial

driver


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POWER SUPPLY CKT.

LED

LED

1k

- +

IN4007 * 4

GND

9-0-9Vac/1Amp

1000uF/35V

7812

+5V

+12V230VAC

50Hz 2.2k

7805

transformer


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RELAY :

A relay is used to isolate one

electrical circuit from another.

It allows a low current control

circuit to make or break anelectrically isolated high

current circuit path.


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LCD DISPLAY

Enable (E)-This line allows access to the display through R/W and RS lines. When

this line is low, the LCD is disabled and ignores signals from R/W and RS.

When (E) line is high, the LCD checks the state of the two control lines and responds

accordingly.

Read/Write (R/W)-This line determines the direction of data between the LCD and

microcontroller. When it is low, data is written to the LCD. When it is high, data is

read from the LCD.

Register select (RS)-With the help of this line, the LCD interprets the type of data on

data lines. When it is low, an instruction is being written to the LCD. When it is high,a character is being written to the LCD.


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8051 Microcontroller


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8051 microcontroller

Features of 8051

i. RAM 128 Bytes (Data memory)

ii. ROM

4Kbytes (ROM signify the on

chip program space)iii. 32 I/O lines.

iv. Serial Port Using UART makes it simpler to interface for serial communication.

v. Two 16 bit Timer/ Counter

vi. Input/output Pins 4 Ports of 8 bits each on a single chip.

vii. Harvard Architecture It has 16 bit Address bus

viii. 8051 can execute 1 million one-cycle instructions per second with a clockfrequency of 12MHz.
http://www.engineersgarage.com/tutorials/timers-8051-timer-programming-tutorialhttp://www.engineersgarage.com/tutorials/timers-8051-timer-programming-tutorialhttp://www.engineersgarage.com/8051-microcontroller


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GSM MODEM


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GSM is the most popular standard for mobile phones in the

world. It is based on TDMA (t ime div is ion mult ip le access)

technology.

We are using the SIMCOM 300, a GSM modem . This is a

powerful GSM/GPRS Terminal with self-contained unit.

This has standard connector interfaces and has an integral SIM

card reader. The modem has a RJ9 connector through which aspeaker and microphone can be connected allowing audio calls

being established, but this feature is not utilized in this project

as only data transfer is needed.


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Software used :-

Window s 2000 & onwards version

Embedded c

Keil so ftware (Programming language for the communicat ion betweenthe Micro contro l ler and the GSM modem)

Proteus softw are(simulat ion)


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Hardware used:-

AT89C51 mic rocon trol lerRelay circ ui t

Relay d rive

Ser ial communicat ion RS 232 proto co l

GSM modem

LCD


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Lab setup:-Setup is in such a way that it contains proper atmosphere

and safe instrumentation.

The GSM module was properly aligned with microcontroller.

Soldering has been firmly done to reduce loose connectionand short circuit.

All safety measures are taken to prevent electric hazard.

A pc with all the software

Measuring instrument


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Application :-

Appl iance con tro l

Cont ro l of doo rs and windows shut ters

Home entertainment system

Secu ri ty system


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Advantages:-

simple and easy to access

Accessed from remote area

Low power consumption

Taking measures to reduce the electricity bill.

portability


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Future enhancement :-It can be used as

Controlling speed of fan

Controlling room

temperature

Recording our favorite TV

program when we are outsidefrom our home.

It can be used for security

proposesburglary

gas detection

smoke detection


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conclusion:-

This document presents a mob i le contro l led and user-

fr iendly approach to the avai lable home automat ion

sys tem. This s ystem can easi ly be implemented because

of i ts wire less commun ication standards.

Til l now, we have researched the li teratures fo r all the

topics that inc lude GSM autom at ion s ystem using SMS.

Then w e have to bui l t the main con tro l program, hardware

and the warning sys tem v ia GSM netwo rk (with SMS).


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Bibliography :-Microcontroller ( theroy and application ) By Ajay V Deshmukh

The tata McGraw-Hill companies

The 8051 Microcontroller and Embedded systems by Muhammad

Ali Mazidi and Janice Gillispie Mazidi , Pearson Education

Circuitstoday.com

Edaboard.com

Vegarobokit.com

Electronics.com

Developershome.com

Seminarproject.com


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