Controlling Home Appliances Using Voice

Controlling Home Appliances
Using Voice

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Using Voice
Introduction
 Home automation has an important role in people’s life when it comes to their
standard of living as it provides convenient and hassle free environment.
 We require the intelligence of a microcontroller to control the devices and
home appliances. There are various existing technologies available for similar
purposes but their cost and complexity is major disadvantage.
 In this project, we have designed an affordable and simple to use system that
takes the input from the voice recognition module and uses the
microcontroller’s intelligence to operate different devices.

Using Voice
Description
 A Bluetooth device is interfaced to the control unit for sensing signals
transmitted by the Android application.
 This data is conveyed to the control unit which switches on loads ON/OFF as
desired.
 An 8051 series microcontroller is used in this project as a controlling device.
 Remote operation is achieved by any smart-phone or Tablet with Android OS,
upon a GUI (Graphical User Interface) based voice operation.

Using Voice
 The transmitting end uses an Android application for the voice commands
that are transmitted to digital bits.
 At the receiver end, these commands are used for controlling the home
appliances on and off.
 At the receiving end, the appliances are driven by power TRIACS through
opto isolators that are interfaced to the microcontroller.
 The program on the microcontroller refers to the serial data to generate
respective output based on the input data to operate the TRIACS through
Opto coupler IC.

Using Voice
Block Diagram

Using Voice
Hardware Requirements
 8051 series Microcontroller
 Transformer
 Opto-isolator
 TRIAC
 Voltage Regulator
 Crystal
 Diodes
 Resistors
 Capacitors
 Lamps
 Push Button
 Bluetooth Device.

Using Voice
Features Of Bluetooth
 Super simple and easy way to interface using Bluetooth stack.
 3.3V Device with standard 5V DC Power source.
 Can also support SPI Protocol, pins are made available.
 Low power consumption, Low cost.
 Has high-performance wireless transceiver system Can be used to interface
with PC, Mac or Android phones/tablets.

Using Voice
BC547 (NPN –Transistor)
 The BC547 transistor is an NPN Epitaxial Silicon Transistor.
 It is used in general-purpose switching and amplification
BC847/BC547 series 45 V, 100 mA NPN general-purpose
transistors.
 The ratio of two currents (Ic/Ib) is called the DC Current
Gain of the device and is given the symbol of hfe or
nowadays Beta, (β).
 The current gain from the emitter to the collector
terminal, Ic/Ie, is called Alpha, (α), and is a function of the
transistor itself.

Using Voice
Opto-isolator
 Opto-coupler MOC3061/63 an LED SCR type combination.
 Opto coupler is a 6 pin IC.
 Additionally while using this IC with microcontroller and one LED can be connected in
series with IC LED to indicate when high is given from micro controller such that we
can know that current is flowing in internal LED of the opto-IC.
 When logic high is given current flows through LED from pin 1 to 2 .So in this process
LED light falls on SCR causing 6 & 4 to close only at the zero cross of the supply voltage.
 During each half cycle current flows through scr gate, external series resistor and
through opto-scr for the main thyristor / triac to trigger for the load at the beginning
of the supply cycle always to operate.

Using Voice
Applications
 The applications are limited only by your imagination.
 Turning lights down / off at night.
 Operating outside lights
 Turning lights or radio on / off when someone approaches the house, simulating
occupancy.
 Operating television, hot water heater, kettle, toaster etc. ready for your use.
 Optimizing use of low cost electricity.
 Working with intelligent electrical white goods e.g. washing machine, fridge,
microwave etc.

Using Voice
Advantages
 Flexibility & Convenience
 Security
 Cost Saving
 Security
 Remote Control

Using Voice
Result and Discussion
 The main aim of the project was to design a system in such a way that it can yield
maximum output with minimum complexity and this home automation system
successfully delivered it.
 Voice Controlled Home Appliances has many applications including device
controlling inside home as well as in industry. One of the main purpose of this
technique is to reduce the human efforts. User don’t have to get up from his place
to control the device.
 So basically we are going to Control home appliance using voice based command.
This project really proves useful for physically disabled people or senior citizens or
elderly person at hour home or even those people who are injured and can not
walk or move.

Controlling Home Appliances Using Voice

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Controlling Home Appliances Using Voice