15-04-2017, 07:41 PM
help me to prepare a literature survey related to it
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wireless voice communication using laser and solar panels
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help me to prepare a literature survey related to it
17-04-2017, 10:09 AM
The intensity of the laser beam changes with the amplitude of the sound signal. The variation in the intensity of the laser beam is converted into a variation in the voltage level using the solar panel of a calculator. The voltage variation in the solar panel is amplified by a LM386 low-voltage audio power amplifier and reproduced by a loudspeaker. The maximum output of the LM386 audio amplifier is 1 watt, while its voltage gain is 20-200.
![[Image: Z9B_76.jpg]](http://electronicsforu.com/wp-contents/uploads/2016/03/Z9B_76.jpg)
From the beginning of human life, before the invention of language, communication was the biggest challenge. The human being has always had the need to communicate throughout history. Initially, the communication was done through signals, voice or primitive forms of writing. As time has changed, the need for communication across distances was grown to pass information from one place to another. Different ways of exchanging information over long distances such as pigeons and smoke signals have been adopted at all stages of the advancement of civilization, some of which have sustained and some have disappeared. All these methods were the pioneer of the modern technological system of long-distance technological communication. This system involves the transmission and reception of a large amount of information in a short period of time. Little by little through technological development, man has invented different procedures of communication with each other. Now the communication has entered our daily life in many ways like telephone, radio, television, cell phone, computer and Internet, in our office and at home. Different modes of communication can provide a fast connection from all corners of the globe and even outside the globe (airplanes, rockets and satellites in space). Along with the wire communication system as the phone, two forms of wireless communication system such as mobile, Internet have become popular now a day. As the laser is stimulated radiation, the problem of interference occurs in the electromagnetic wave is eliminated, can be a good replacement of the current communication systems. The laser-based voice communication system currently available in the market is expensive, $ 614, compared to our country's overall revenues. People in our country generally use cell phones now to communicate with one another for general purposes and sometimes spend hours and money (as a call rate) to talk to the neighbor, especially the younger generation.
From the beginning of human life, before the invention of language, communication was the biggest challenge. The human being has always had the need to communicate throughout history. Initially, the communication was done through signals, voice or primitive forms of writing. As time has changed, the need for communication across distances was grown to pass information from one place to another. Different ways of exchanging information over long distances such as pigeons and smoke signals have been adopted at all stages of the advancement of civilization, some of which have sustained and some have disappeared. All these methods were the pioneer of the modern technological system of long-distance technological communication. This system involves the transmission and reception of a large amount of information in a short period of time. Little by little through technological development, man has invented different procedures of communication with each other. Now the communication has entered our daily life in many ways like telephone, radio, television, cell phone, computer and Internet, in our office and at home. Different modes of communication can provide a fast connection from all corners of the globe and even outside the globe (airplanes, rockets and satellites in space). Along with the wire communication system as the phone, two forms of wireless communication system such as mobile, Internet have become popular now a day. As the laser is stimulated radiation, the problem of interference occurs in the electromagnetic wave is eliminated, can be a good replacement of the current communication systems. The laser-based voice communication system currently available in the market is expensive, $ 614, compared to our country's overall revenues. People in our country generally use cell phones now to communicate with one another for general purposes and sometimes spend hours and money (as a call rate) to talk to the neighbor, especially the younger generation.
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