voicecontrolhomeautomation-130627021245-phpapp01

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Presented by:Abhishek Neb


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Home automation deals with providing anetwork in the house which links

computers & peripheral equipment, smart chip bearing household appliances

(white goods) e.g. dish washers, washingmachines, microwaves etc., and

sub-systems like Heating, Ventilation, Air-conditioning (HVAC), and security systems.


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Your security system knows all about your occupancyof the house. With a little more development it canbuild an intelligent

expert systemto predict your usage. Your central heating programmer knows the standards

of comfort you expect but doesnt know which roomsare in use.

By linking just these two you could achieve a reductionin fuel costs and a better match to your requirements.


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PC-based system: Requires a PC to be running at alltimes. Dedicated PC

Shared PC

Standalone system: Runs without a PC, although mayuse a PC for programming

Hybrid system: Runs without a PC, but uses PC to addmore functions.


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The goal of this project was to develop a homeautomation system that gives the user complete

control over all voice controllable aspects of his or herhome.

The automation system has the ability to be controlled

from a central host PC through voice.


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Inputs Voice Commands Key Presses (User Responses to Menu)

Outputs User Interface Menu Via LCD Screen

Speaker Queuing User To Say Command Word


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The way of this concept function is when a user speaks out somecommand, then the voice is captured through microphone as theinput devices.

Once the voice is captured, the usage of a decoding system that

will convert the analog (voice) to digital (binary signal).

Later, the input voice is compared with the data stored in thememory early before the testing.

The output of the comparison is the voice matched with any ofthe command trained and certain signal is produce as the inputfor the controlling system.


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In this section will discuss on the hardware used inthe implementation of this system that includetheULN2003 IC chip, microcontroller, voltage

regulator and the relay for interfacing.

RS 232 interface serial communications

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The standard is simply concerned with serial data

communication between the computer which has the voice

recognition software and the hardware kit.

Cabling :Single-ended

Number of Devices :1 transmit, 1 receive

Communication Mode: Full duplex

Data Rate (max) :1Mbps


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In this project we use 7805 regulator to make a perfect5 volt dc to microcontroller circuit.

Regulated 5 volt supply is connected to the Pin no 40of controller . IC 7805 is a three pin regulator . Pin no 1is input pin , pin no 2 is ground pin and pin no 3 isoutput pin. Here 78 mean positive voltage and 5 means5volt. 79 means negative voltage . There are so manyregulator available from 7805 to 7818 volt, here 18means 18 volt. Pin no 20 of the controller is connectedto ground pin. Pin no 1 to 8 is for the port 1.


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ULN 2003

The ULN2003 is a small integrated circuit that contains 8

transistor driver channels. Each channel has an input to a resistor

connected to the base of a transistor and a 1 amp open collector

output capable of handling up to about 30volts . Each of the

collectors has a reverse biased diode connected to a common Vcc

pin that provides inductive spike protection.

The output from the microcontroller is fed into the ULN2003

relay driver and this relay driver decides which port should be

kept on or off based on the output from the microcontroller.

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Compatible with MCS-51 Products

Fully Static Operation: 0 Hz to 24 MHz

Three-Level Program Memory Lock

128 x 8-Bit Internal RAM

32 Programmable I/O Lines

Two 16-Bit Timer/Counters

Programmable Serial Channel


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Relay

In this project, the primary interface between the systems with the

electrical appliance is the relay.

The relay is actually a switch alike component just the difference

is the way of triggering is through the magnetic field that will

change the contact and thus activating a switch.

The relay. 17


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In the power supply section we use one step down

transformer to step down the voltage from 220 volt ac to

9 volt dc since the operating voltage for the ULN2003

relay driver is 9v .

Output of the transformer is further connected to the two

diode circuit. Here two diode work as a full waverectifier circuit. Output of the full wave rectifier is now

filtered by the capacitor.


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The applications are limited only by your imagination:

Turning lights down / off at night.

Operating outside lights

Turning lights or radio on / off when someoneapproaches the house, simulating occupancy

Operating television, hot water heater, kettle, toasteretc. ready for your use.

Optimizing use of low cost electricity. Working with intelligent electrical white goods e.g.

washing machine, fridge, microwave etc.


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Flexibility & Convenience

Security

Cost Saving

Security

Remote Control


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RESULT AND DISCUSSION

The main aim of the project was to design a system insuch a way that it can yield maximum output withminimum complexity and this home automationsystem successfully delivered it.

There are some issue that arises when using thissystem. The problems are the pronunciation of theuser when doing the process. For the pronunciationmatter, the system takes it at a quite high level of

sensitivity. . So when the user wishes to use the system,thus he or she must produce the word with the correctpronunciation as in the training process


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Thank you

Date post:	02-Jun-2018
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