Controlling Home Appliances Using Voice

Controlling Home Appliances Using Voice Introductio n  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.voice recognition module

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.

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.

Controlling Home Appliances Using Voice Block Diagram

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.

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.

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, (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.

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.

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.

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

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