i am pabitra patra...student of 4th year...B.tech EE...want to do this very inovative interesting project..plz help me supplying the proper ckt components and ideas...thank u
Communication plays an important role in today's daily life and can be used as a better tool in control systems. It deals with wire communication and is used to control the speed of the motor. Of all the mechanisms, the hardware description language of the microcontroller turns out to be efficient than other mechanisms. Digital control means provide accurate results compared to the approximation of analog systems. Embedded technology is a key role in integrating the various functions related to it. This proposal generally reduces manpower, works efficiently and saves time without human involvement. With advances in technology, existing systems are developed to have built intelligence. Due to technological development, either DC or AC machine speed machine can be controlled by various methods. Through the voice process the machine can be controlled depending on the application wired or to transmit the signal the wireless communication can be used. In this way the electrical technology is combined with the technology of communication and computer science. Now one day it is very important to reduce manual error and manual operation.
Speech recognition is a technology in which spoken words can be translated into a text format. In this some of the recognition systems use a training to convert a section of individual text speakers into the speech recognition system. This system observes the specific voice of the person and that voice is tuned by recognition, which results in an accurate transcription. The speaker-dependent system uses a training concept. The independent loudspeaker system does not use a training concept. These concepts focus mainly on who is speaking and not on what they are talking about. "Voice Recognition" means "recognize by voice," something that humans do all the time on the phone. As soon as someone familiar says "hello" the listener can identify by the sound of his voice alone. The project is designed with microphone, microcontroller, amplifier, pulse configuration circuit and driver circuit with relay. The voice signal is given as input to the microphone and its output is amplified using an amplifier. The amplified signal is given to the pulse shaping circuit. The pulse conformation circuit generates square pulses that are given to the microcontroller. The pulse waveform to turn on and off the various electrical appliances used is stored in the microcontroller. The microcontroller is programmed to compare the received pulse with the stored values and to activate the corresponding relay excitation circuits of the electrical apparatus.