14-08-2012, 01:41 PM
VOICE INITIATED ELECTRICITY GENERATION
VOICE INITIATED ELECTRICITY GENERATION.pptx (Size: 83.93 KB / Downloads: 56)
MICROPHONE
Sound ENERGY we can hear travels only so far before it soaks away into the world around us. Until electrical microphones were invented in the late 19th century, there was no satisfactory way to send SOUNDS to other places.
You could shout, but that carried your words only a little further.
You couldn't shout in New York City and make yourself heard in London.
And you couldn't speak in 1715 and have someone listen to what you said in 1750. Remarkably, such things are possible today:
by converting sound energy into electricity and information we can store, microphones make it possible to send the sounds of our voices, our music, and the noises in our world to other places and other times.
INTRODUCTION:
The project is an attempt to place an idea of turning sound into electricity, allowing a mobile to be powered up while its user holds a conversation.
Application : Recharge phones using nothing but the power of the human voice.
This would also be able to harness background noise and even music to charge a phone while it is not in use.
BASIC WORKING
TRANSMITTER SECTION: The project is initiated by sound which operates the switch either ON or OFF. The microphone picks this sound and converts sound energy into electrical energy. The power of this electrical energy is very low to operate the relay, therefore this energy is fed to the transistors to amplify the signal and enhance the energy.
RECEIVER SECTION: This comprises of motor which rotates generator which produces electricity which can be used for various applications, such as, multimeter testing, street lightening, charging of capacitor, and recycling of energy to be used in battery for storage during power failures.
This minor part is powered by solar panel which is designed for converting sunlight to electric energy. The solar radiation is absorbed by photovoltaic cell in which light excites electrons to move from one layer to another through semi conductive silicon materials. This produces an electric current. During power failures, batteries provide an emergency supply of electricity as they can be used again after they have discharged their electrical energy and can also be recharged.