Here is something interesting that took me a weekend to build, i was thinking a but this for months. To achieve this, the 9v supply to the opamp is controlled by an npn transistor, which can act as a switch controlled by the microcontroller. Ldr, laser light, laser voice transmission process. If you choose, the receiver can be modified to also work as a super spy ear and an audio. This paper is designed for voice transmission system based on laser torch. In this way device begin to propagate laser light hermann. The receiver does not need any complicated alignment. The laser 4 fm radio is a great choice for modelers looking for a solid basic radio vs.
The body of the laser torch is connected to the emitter of npn transistor t1 and the springloaded lead protruding from inside the torch is connected to the ground. The laser beam passed from the transmitter laser torch is received by t3 it produces a signal in correspondence to the light signal received from the led transmitter circuit. Abstractin this paper we designed the circuit, using that circuit we can communicate with our neighbors wirelessly. Using this circuit you can communicate with your neighbors wirelessly. This paper is about laser based voice and data communication. Pdf study of laser based transmission reception parameters. Project report on laser torch based voice transmitter and. Bug a room and transmit voice over a laser beam also a super spy earstethoscope. Pdf laser as a communication medium can provide a good substitute for the.
The alarm comprises laser transmitter and receiver units, which are to be mounted on the opposite pillars of the entry gate. Then, the receiver will receive the signal light, modulated and enforced signals that can be sent by voice amplifier where the music can be heard. The constructed prototype of the transmitter and receiver. Using a simple laser pen pointer, a few misc parts, and about 15 minutes, you can make a simple laser communicator that converts a sound source into light that travels across a room, and back into. Laser medium for transmission transfer of data high rate similar to fiber optic cable system operate near infrared region of the spectrum wave length of between 780920nm.
It mainly consists of two modules called laser transmitter and laser receiver. Take a note that this circuit is different with av transmitter and av receiver which can be used for sound and video communication, this laser communication circuit only work for audiosound transmission. Transmitter circuit of laser voice transmitter circuit. Long range burglar alarm using laser torch full circuit diagram. The circuit presented here transmits pulses wirelessly to long distance more than 20 meter using keychain laser readily available in market. Giving it a try i decided to build one from the parts lying around. Laser torch based voice transmitter and receiver amplifier.
I still recommend this if you are sending a digital signal. Dec 18, 2012 to send secret voice communications, move the amp from the receiver to the transmitter and plug in a mic. The 7555 timer acts as astable multivibrator, which produces a frequency of 5. The phototransistor of the receiver must be accurately oriented towards the laser beam from. The acronym laser stands for light amplification by stimulated. The basis of laser which is based on the principle of the theory of induced.
The idea came from a physics teacher who was trying to achieve modulation using laser. Right from the origin communication system had undergone several. We connect a vl53l0x laser timeofflight sensor to an arduino to measure the liquid level in a tank using tof ranging. The laser needs to be turned off while the transmitter is scanning for the receiver, mainly for safety and power reasons. This paper addresses the details about the design and implementation procedure of the laser voice transmitter circuit. Development of optical wireless audio system using. Laser torch based voice transmitter and receiver youtube. Then the receiver will catch the light and demodulate it and drive the speaker.
Oct 18, 2018 how to transmit audio with a laser pen. Laser circuits computer based microcontroller projects. Because we are sending a continuous analog signal, we will need our laser bias such that the laser is on at all times. Long range burglar alarm using laser torch full circuit. Laser torch based voice transmitter and receiver embedded systems ieee project topics, robotics base paper, synopsis, abstract, report, source code, full pdf, working details for electronics science electical engineering, diploma, btech, be, mtech and msc college students. Development of optical wireless audio system using infrared. Scribd is the worlds largest social reading and publishing site. Laser torch based voice transmitter and receiver free download as word doc. Oct 20, 2012 introduction to laser torchbased voice transmitter and receiver project.
The output of preamplifier is given to a laser torch which converts the. A light based voice transmission and reception system is implemented by using light from a laser torch. Objectives of project the main aim of this paper is to construct a laser communication system by using low cost laser torch and available electronic equipment which can be got easily form local electronics shop everywhere and people can construct for. Longrange burglar alarm transmitter circuit using laser torch. Receiver circuit of laser based communication link.
A transmitter generates continuous pulses that are fed to laser. Study and design of a laser based wireless optical voice. Here the motive of using laser is that while the transmitter and receiver must require lineofsight conditions, they have the benefit of. May 27, 20 this project contains complete information about the design, fabrication, construction and implementation of laser torchbased voice transmitter and receiver wireless communication. Mar 12, 2021 to test this simple laser communicator circuit go to a room where electrical lights are switch off, if you dont you will hear humming noise on your amplifier.
The receiver contains a photo detector and is connected only through an optical path with the transmitter, with air as the free space medium. Laser torch based voice transmitter and receiver k. Laser audio transmitter and receiver instructables. Either the transmitter as well as the receiver are assembled around ic lm386, it is powered by a 9v battery. As per usual i have the detailed instructions in the video. The circuit consists of a transmitter and a receiver. Figure 1 shows the transmitter circuit here a laser diode ld1 with maximum operating voltage of around 2.
This project is developed for the users to communicate voice from one place to other in wireless manner using laser. Laser communication transmitter receiver electronic. The transmitter circuit is powered by 3v dc supply. Laser,a laser diode at the transmitting end act as a transduser to convert the digital data into laser form and transmitted,at the receiving end a laser transistor convert the laser data into digital form. Laser based audio communication system is implemented successfully based on micro controller computing technology. Pdf laser based audio communication system ijesrt journal. Turn on delay, frequency chirping and temperature effects.
A tiny light detector may allow for superfast broadband communication o. Ldr on the receiver side, detects this light pulses and reproduces it at the output. Objectives a laser communication system by using low cost laser torch and electronic equipment which can be got easily form local electronics and people can construct for their personal use. Highly efficient free space laser communication ijareeie. Laser voice transmitter circuit engineering projects. The laser torch can transmit light up to a distance of about 500 metres. In this paper we designed the circuit, using that circuit we can communicate with our neighbors wirelessly. A microphone is used here as sound sensor which detect sound and change it into electrical signal.
The laser torch can transmit light up to a distance of about 500 meters. Instead of rf signals, light from a laser torch is used as the carrier in the circuit. Oct 16, 2012 introduction to laser torchbased voice transmitter and receiver project. I created a little laser alarm from a laser emitter and a laser receiver. Deepak kumar, kundan kumar singh and anand mohan 2 ii. In this paper we demonstrate a new revolutionary concept in the field of fiber optic communication systems, with the implementation o lasers in the field of optical communication had created new dimensions in the advancement of virtual communication, in conventional radio frequency communication systems we find. Advantages of laser torch based voice transmitter and receiver. This is done by detecting the light emitted from the receiver s laser using a. Feb 27, 2010 yes, you need an audio input to the transmitter so it can modulate the light. Data transmission is based on pulse width modulation by the use of. Devlopment of point to point laser communication model ird india. This configuration yields a complex circuit with a number of components, including an amplifier, a filter, and a threshold detector.
The signal coming from the microphone is very small to alter the power of laser. The receiving section composes with l14f1 photo transistor, lm 386 and loud speaker. The transmitter and receiver should be powered by their own 9 v batteries. Talking about the other half of the project, which is a receiving portion, it comprises a photo sensitive transistor. Laser blinks at the rate of pulse frequency and emits light pulses. Pdf laser torch based voice transmitter and receiver semantic. The light source is a laser diode and the detector is a semiconductor based photoresistor made of cadmium sulfide cds. May 02, 2017 looking for some analog circuits to make i got this circuit of laser based audio transmitter on efy website. Abstractin this paper we designed the circuit, using that circuit we can communicate with our. Introduction to laser torchbased voice transmitter and receiver project. Oct 22, 2018 27 jan laser torch based voice communication system photo detector at receiver detects the laser light and voice output through loud speaker. The receiver circuit uses an npn photodiode as the light sensor that is followed by a twostage transistor preamplifier and ic741 based audio power amplifier. Here the motive of using laser is that while the transmitter and receiver must. Transmitter was modulation frequency to produce a series of audio signal encoding.
Application of wireless audio transmission circuit using laser. Laser transmitter the main properties of the laser diode transmitter are. Power up both the transmitter and receiver, input the audio signal to transmitter and direct the laser beam to solar cell, you will hear clear sound at speaker. Battery driven design, free space optics, laser torch, low cost. The audio signal is mixed with the carrier beam and transmits through a laser torch. Right from the origin communication system had undergone several changes in terms of its advancement, continuous modernization taking place in every aspect of global communication. In laser communication the transmitter and receiver must require a lineofsight. If there is any obstruction in the path of the laser beam, no sound will be heard from the receiver. Using this circuit you can communicate with your neighbours wirelessly.
Laser communicator circuit send, receive data with laser. Icetc32017 low cost voice communication device design. Just keep the phototransistor oriented towards the remote transmitter s laser point and adjust the volume control for a clear sound. If you want 2way communication, build a second copy of the system so that each side has both a receiver and transmitter.
Design and real prototype fabrication of a free space. The phototransistor of the receiver must be accurately oriented towards the laser beam from the torch. Wireless voice communication device design using laser. Laser torch based voice transmitter and receiver embedded.
Introduction to laser torch based voice transmitter and receiver project. Whenever anyone enters to interrupt the transmitted laser beam falling on the receiver, the buzzer in the receiver circuit sounds an alarm. The laser 4 features 4channels, servo reversing, channel 1 and 2 mixing, plus many more options. Liquid level sensing using a laser tof sensor project tutorial by team protocentral. A voice transmission circuit has been designed using an optocoupler or an optoisolator which transfers electrical signals between two isolated circuits by us. A simple and effective alexa based system to provide food and fun to your dog. The receiver circuit fig 2 uses an npn phototransistor as.
Laser torchbased voice transmitter and receiver projects. Just keep the photodiode oriented towards the remote transmitter s laser point and adjust the volume control for a clear sound. A laser communication system by using low cost laser torch and electronic equipment which can be got easily form local electronics and people can construct for their personal use. Photo detector at receiver detects the laser light and voice output through loud speaker. Laser torch based voice transmitter and receiver block diagram, project report, circuit diagram. This instructable will show you how to make a laser voice transmitter and reciver housed in the infamous altoid tin or any other clandestine container. Both the transmitter and the receiver are built around ic lm386, powered by a 9v battery. Instead of rf signals, light from a laser torch is used as the carrier in this project. Laser communication transmitter receiver circuit scheme. Laser torch based voice transmitter and receiver electrical. Laser based communication link engineering projects. The transmitter circuit is build using microphone, audio amplifier, laser diode and few passive components. Laser torch based voice transmitter and receiver amplifier scribd.
Jan 27, 2017 photo detector at receiver detects the laser light and voice output through loud speaker. Design and implementation of mobile laser data transceiver. This in turns modulates the laser beam, since laser torch acts like a balanced modulator, where two signals one is message signal audio signal and carrier laser signal, superimposed. The transmitting section mainly comprises with condenser microphone, ic 741, bc 548, bd 9 and laser torch. A laser torch can transmit light up to a distance of about 500 metres. The transmitter circuit comprises condenser microphone transistor amplifierbc 548, a modulatorbd9. It uses photodarlington 2n5777 t2 to sense the laser beam transmitted from the laser torch. Govinda1 waseem arshad2 santosh ram3 shashank agrawal4 1scse, university, vellore, india 2, 3, 4, sense, vit university vellore, india. One end of the laser torch is connected to the emitter of npn transistor t1, and the other end of the laser torch is connected to the ground.
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