Controlling Home Appliances Using Voice

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Controlling Home Appliances Using Voice
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Controlling Home Appliances Using Voice
Introduction

• Home automation has an important role in peoples
  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
  microcontrollers intelligence to operate
  different devices.

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Controlling Home Appliances 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.

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Controlling Home Appliances 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.

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Controlling Home Appliances Using Voice
Block Diagram
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Controlling Home Appliances Using Voice

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

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Controlling Home Appliances 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.

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Controlling Home Appliances 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, (ß).
• The current gain from the emitter to the
  collector terminal, Ic/Ie, is called Alpha, (a),
  and is a function of the transistor itself.

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Controlling Home Appliances 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.

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Controlling Home Appliances 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.

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Controlling Home Appliances Using Voice

• Advantages
• Flexibility Convenience
• Security
• Cost Saving
• Security
• Remote Control

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Controlling Home Appliances 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.
• There are some issue that arises when using this
  system. The problems are the pronunciation of the
  user when doing the process.
• For the pronunciation matter, 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 correct
  pronunciation as in the training process

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