AProject Seminar on

Telephone Based Home Automation System

AtMAHARISHI ARVIND INTERNATIONAL INSTITUTE OF

TECHNOLOGYKOTA, RAJASTHAN

Group Members:-Krishan Gopal GuptaLokesh Kr. SindhavMohit AgrawalJagnandan SinghLokendra Pankaj

Project Guide:-Mrs. Anamika Agarwal

Introduction

What is DTMF ?

Micro-Controller & IC’s used

Principal Of Relay

Coding & Simulation

Applications

Conclusion

CONTENT

WHAT IS “HACS”….???Home Appliance Control System accessed

by a remote device such as mobile phone or a palm-top to allow a home owner to control, monitor and coordinate home appliances.

Why HACS….???1. Saves time2. Save money (Long run)3. Self Maintenance4. Security5. Makes life easy

INTRODUCTION

When you press a button in the telephone set keypad, a connection is made that generates a resultant signal of two tones at the same time. These two tones are taken from a row frequency and a column frequency. The resultant frequency signal is called "Dual Tone Multiple Frequency". These tones are identical and unique

What Is DTMF…?

We Will Use 89C51 Microcontroller.

It Is a 40 Pin Microcontroller.

Mostly Used DTMF Receiver IC Is The Motorola MT8870.

Used In Electronic Communications Circuits.

MT8870 is an 18-pin IC.

We Will Use 14 Pin LCD.

Microcontroller & IC’s Used

89C51 µC

DTMF Decoder Interfacing

89C51 µC

LCD

LCD INTERFACING WITH µC

COMPLETE DIAGRAM

PRINCIPAL OF RELAY

Coding &

Simulation

C:\Program Files\FEPL\Topview Simulator -

Security systems & Access control

Entertainment Systems

Communication systems

Wireless radio control

Mobile wireless robot control

Reporting during car accidents

Almost Anything Else you can think of…..

Application

CONCLUSION

We should know what is embedded system & how it is playing important roll in our daily life.