2. SMART
HOME
AUTOMATION
PROJECT GUIDE:
Prof. S. K. Rana
Assistant Professor,
Electronics and Communication Engg. Department,
L. D. College of Engineering,
Ahmedabad-380015
PREPARED BY:
Mitul Lakhani
Rahil Shah
Dhaval Sonani

3. What is Smart Home Automation??
• The home automation becomes
important, because it gives the user the
comfortable and easy access to the
home devices. The implementation and
design of wireless home automation
control is possible using many methods.
• Our system uses DTMF technology to
control the home appliances

4. Need of the System
• Users are not able to access the home
appliances physically from the far area.
• Hence to control the system from
remote area when we are not able to
access them physically ,”Smart Home
Automation“ is necessary.

5. Pre assumption
The following is a list of assumptions for
the project:
• 1. The user and control unit will establish
communication via GSM.
• 2. All service charges from service provider
apply.
• 3. The controlled appliances will have to have
an electrical interface in order to be
controlled by microcontroller

6. Review of Related Literature
• This project has been made by several
people, but no one has used DTMF
technology for controlling home
appliances. They have used DTMF
technology for different purposes but
not for controlling home appliances.

7. System Specification
• An authenticated user can control eight home appliances from
any remote place having mobile phone network.
• Regulated power supply: 5V and 500ma.
• Relay: 230V AC
• The system requires two phones out of which the one present
at the control unit has to be a cell phone with auto answer
facility.
• The system requires ATMEL microcontroller AT89S52 and DTMF
decoder MT8870D IC.
• It requires 16X2 LCD (Liquid Crystal Display) to display the
device status.

8. Block Diagram

12. DTMF
• DTMF stands for dual tone multiple
frequency. DTMF is a term which used in
telephone industry. When any key on
telephone or mobile phone is pressed one
tone is generated and it is audible which
nothing but a DTMF tone is to decode
DTMF tone from mobile phone we need
MT8870 DTMF decoder IC, 3.5mm male
and female connector.

13. Table of DTMF Frequency

14. Connection of splitter with landline and system

15. Present Scope
• This product is aimed toward average
consumers who wish to control household
appliances remotely from their cell phones
provided that the appliances are electrically
controllable. Example of feasible appliances
and applications under consideration
include; enable/disable security systems,
fans, lights, kitchen appliances, and
heating/ventilation/air conditioning system.

16. Future Scope
• Right now we have designed the project
for control of eight devices but it can be
designed for more number of devices. It
can be further expanded with a voice
interactive system facility. A feedback
system can also be included which
provides the state of a device (whether it
is on/off) to the remote user.