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Showing posts with label Home automation. Show all posts
Showing posts with label Home automation. Show all posts
DTMF Based Load Home Automation Project
DTMF Based Load Home Automation Project
We
know that in industries, loads are distributed over large distances, and it is
not convenient to operate all those equipment time to time and it is also time
to consume. Into
day’s highly developing world most of
peoples wants their homes are automated as per increased level of
affordability, simplicity and comfort
through the integration of home appliances with smart phone and tablet
connectivity.
This project we
propose DTMF based Home Automation system that provides the wireless controls
various home appliances such as a fan, bulb, AC, TV etc. In DTMF based load control system a mobile is
connected to the circuit and each key on cell phone correspond to the device
that needs to be activated. The key must be authenticating with desire function.
The DTMF decoder is used to identify the user choices and appropriate action is
performed.
Block diagram:
This project includes DTMF {dual
tone multi frequency} tones are composed of a
series of low frequencies for each column of keys and a series of high
frequencies for each row of keys. Each pressed key creates a signal that is
equal to the sum of the column’s low frequency and the row’s high frequencies.
When the signal is sent over the telephone line to the telephone company’s
switching center, a DTMF decoder separates the signal back into the two
frequencies and passes it along to the recipient’s phone. The DTMF decoder is
responsible for doing this for all telephone numbers entered by all callers in
its designated area every day.
Here, microcontroller is used
as a control unit which gets inputs (instructions, commands) from a mobile keypad to control one appliance. Same key will
be used to turn on and off the appliance. Each time we press the same key, the
appliance changes its status. After the appropriate tone and
password is entered, it is decoded via the DTMF decoder which further
translates it into binary values this values are the input to the
microcontroller which verifies each tone individually and corresponding output
is given at the output terminal. Thus, when the relay drive is activated by the
microcontroller, the device either gets ON or is switched OFF as per the
requirement.
Hardware
Specifications:-
·
8051
Microcontroller
Software
Specifications:-
· MC Programming Language: Embedded C
·
Keil version IDE
·
Proteus For Circuit &PCB Design
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