This document presents a project seminar on a telephone based home automation system conducted at MAHARISHI ARVIND INTERNATIONAL INSTITUTE OF TECHNOLOGY in Kota, Rajasthan. The project aims to develop a Home Appliance Control System (HACS) that allows a homeowner to control, monitor, and coordinate home appliances remotely using a mobile phone or palm-top. The system utilizes Dual Tone Multi-Frequency signaling to control appliances via a microcontroller and other integrated circuits. Applications of the system include security, entertainment, communication, and more.

1. A
Project Seminar on
Telephone Based Home Automation System
At
MAHARISHI ARVIND INTERNATIONAL INSTITUTE OF
TECHNOLOGY
KOTA, RAJASTHAN
Project Guide:- Group Members:-
Mrs. Anamika Agarwal Krishan Gopal Gupta
Lokesh Kr. Sindhav
Mohit Agrawal
Jagnandan Singh
Lokendra Pankaj

2.  Introduction
 What is DTMF ?
 Micro-Controller & IC’s used
 Principal Of Relay
 Coding & Simulation
 Applications
 Conclusion

3. 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 time
2. Save money (Long run)
3. Self Maintenance
4. Security
5. Makes life easy

4. 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

5.  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.

6. 89C51 µC

7. LCD
89C51 µC

11.  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…..