The transmitter converts the audio signal to pulsating light with respect to input. 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. Objectives a laser communication system by using low cost laser torch and electronic equipment which can be got easily form local electronics and. The electronic parts that have been used to implement the mobile laser transceiver are laser diode of 650 nm used as. Laser torch based voice transmitter and receiver full report. Preset vr4 is utilized to adjust the signal level from the solar panel. Battery driven design, free space optics, laser torch, low cost. A simple and effective alexa based system to provide food and fun to your dog. Laser communication transmitter and receiver design.
Download the project report and the reference files. 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. Laser torch based voice transmitter and receiver ppt presentation covers important information for understanding project over view. 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. Oct 20, 2012 introduction to laser torchbased voice transmitter and receiver project. This laser transmitter receiver circuit use light from a laser torch to transmit an receive signal from a distance up to 500 meters. Here is a project laser voice transmitter uses a laser beam to transmit the voice. The gain of the amplifier is fixed by capacitor c7. In laser communication the transmitter and receiver must require a lineofsight conditions and laser. This laser transmitter receiver use a laser torch as the carrier in the circuit. Laser torch based voice transmitter and receiver using this circuit you can communicate with your neighbors wirelessly. Deepak kumar, kundan kumar singh and anand mohan 2 ii. A transmitter generates continuous pulses that are fed to laser.
This is done by detecting the light emitted from the receiver s laser using a. Receiver circuit of laser based communication link. Laser based communication link engineering projects. Photo detector at receiver detects the laser light and voice output through. Instead of rf signals, light from a laser torch is used as the carrier in a circuit. If there is any obstruction in the path of the laser beam, no sound will be heard from the receiver. Dec 18, 2012 first, replace the earphone of your receiver with an audio plug or just clip the audio plug to the earphone wires, and plug it into an amp or stereo. Turn up the volume on the amplifier until you hear a hiss, then turn it down until it isnt noticeable. Highly efficient free space laser communication ijareeie. 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. Data transmission is based on pulse width modulation by the use of. 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. A photo transistor detects light from the transmitter and allows it to conduct.
Laser torch based voice transmitter and receiver amplifier scribd. The laser torch can transmit light up to a distance of about 500. The circuit presented here transmits pulses wirelessly to long distance more than 20 meter using keychain laser readily available in market. Due to pulsating light input to the receiver the voltage across the solar cell varies with respect to audio input. The laser light is received by the photo transistor. Ldr, laser light, laser voice transmission process. This laser transmitter receiver circuit project can be used as an spy device by mounting the transmitter in one building and the receiver in other building, but. The second circuit in the transmitter is based on a. Laser torch based voice transmitter and receiver block diagram, project report, circuit diagram. A depiction of the circuit used to directly communicate to the receiver with the transmitter the second mode of laser transmission was a direct communication mode. Laser torch based voice transmitter and receiver k. The laser microphone is able to reproduce audio detected from a vibrating surface with relatively high accuracy. Laser torchbased voice transmitter and receiver projects.
At the transmitter audio signal is coupled to the laser light by using a transistor operating in common collector mode. Free space laser communication systems have the potential to provide flexible, highspeed connectivity suitable for longhaul intersatellite and deepspace links. Instead of rf signals, light from an ir led is used as. Jan 05, 2019 16 oct download project report on laser torch based voice transmitter and receiver. This paper is designed for voice transmission system based on laser torch. I will be keeping both circuits very basic for this project. Design and implementation of mobile laser data transceiver. The receiver circuit fig 2 uses an npn phototransistor as the. Design and real prototype fabrication of a free space. Introduction to laser torchbased voice transmitter and receiver project. In present investigation laser communication system consists of two sections transmitter and receiver.
Study and design of a laser based wireless optical voice. The output is given to a two stage pre amplifier lm386 based audio power amplifier, and the output is given to a speaker. The audio signal transmitted by the laser diode ld1 is received by the calculators solar panel and amplified by ic2. Instead of rf signals, light from a laser torch is used as the carrier in the circuit. The receiving section composes with l14f1 photo transistor, lm 386 and loud speaker. Introduction laser communications systems are wireless connections through the atmosphere. Laser voice transmitter circuit engineering projects. 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 audio sound transmission. Jan 27, 2017 photo detector at receiver detects the laser light and voice output through loud speaker.
The circuit used for direct communication is shown in figure 3. I created a little laser alarm from a laser emitter and a laser receiver. The constructed prototype of the transmitter and receiver. Laser torch based voice transmitter and receiver embedded. Hareendran m obile phone chargers available in the market are quite expensive. Laser communicator circuit send, receive data with laser. Laser torch based voice transmitter and receiver microphone. May 27, 20 this project contains complete information about the design, fabrication, construction and implementation of laser torchbased voice transmitter and receiver wireless communication. Mithun r roll no 47 2k8428 s7 ece a government college of engineering kannur introduction significance reduced interference high level of secrecy highperformance links high data rate small antenna size narrow beam divergence narrow field of. The laser communications systems consist of three main parts are a transmitter, free space channel and receiver. Development of optical wireless audio system using infrared. When a train arrives, it blocks the light falling on the receiver.
In this work the circuit of mobile laser transceiver has been designed to use for data exchange between computers. The circuit consists of a transmitter and a receiver. Project report on laser torch based voice transmitter and. Govinda1 waseem arshad2 santosh ram3 shashank agrawal4 1scse, university, vellore, india 2, 3, 4, sense, vit university vellore, india. Giving it a try i decided to build one from the parts lying around. Development of optical wireless audio system using. Just keep the phototransistor oriented towards the remote transmitter s laser point and adjust the volume control for a clear sound. Abstractin this paper we designed the circuit, using that circuit we can communicate with our neighbors wirelessly. Pcb for the above schematics built in express pcb free so. Laser torch based voice transmitter and receiver youtube. Laser torch based voice transmitter and receiver block. The receiver circuit is build around a signal audio amplifier ic tda 7205.
In the transmitter circuit, audio signal of the nonsinusoidal waveform and hav. The proposed circuit basically had the transmitter circuit and this block consists of transistor amplifier bc548 coupled with condenser microphone. The phototransistor of the receiver must be accurately oriented towards the laser beam from the torch. Laser receiver circuit here the circuit diagram of laser receiver. Transmitter was modulation frequency to produce a series of audio signal encoding. The receiver is an amplifier paired with a solar cell as photo detector. Talking about the other half of the project, which is a receiving portion, it comprises a photo sensitive transistor.
The receiver circuit fig 2 uses an npn phototransistor as. How to connect two computers networks or any other electronic devices with a laser data link. The laser needs to be turned off while the transmitter is scanning for the receiver, mainly for safety and power reasons. Let us consider that the train is moving from left to right and the first sensor pair acts as a counter and gets activated when the train blocks it, and then the.
Lasar torchbased voice transmitter and receiver engineering. May 02, 2017 laser audio transmitter looking for some analog circuits to make i got this circuit of laser based audio transmitter on efy website. Right from the origin communication system had undergone. The transmitter circuit comprises condenser microphone transistor amplifier bc547 followed by an op. In this paper we designed the circuit, using that circuit we can communicate with our neighbors wirelessly. Connect the output of the pam8403 to the input of the laser driver circuit and the transmitter is done. Receiver circuit of laser voice transmitter circuit. A photo transistor is connected in the receiver circuit. Oct 16, 2012 introduction to laser torchbased voice transmitter and receiver project. Pdf laser torch based voice transmitter and receiver semantic. Initially, the ir led is the transmitter that continuously transmits ir light and allows it to fall on the receiver. I recommend to not build the laser driver on a breadboard, but solder it on small piece of pcb or free form in a piece of shrink tube at the back of the laser module. This paper is about laser based voice and data communication.
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. Laser torch based voice communication system slideshare. Laser communication transmitter receiver electronic. The laser torch can transmit light up to a distance of about 500 meters. Laser blinks at the rate of pulse frequency and emits light pulses.
Presentation covers basic design details and requirements. 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. The transmitting section mainly comprises with condenser microphone, ic 741, bc 548, bd 9 and laser torch. For these applications, powerefficient transmitter and receiver designs are essential for costeffective implementation. Laser communication transmitter receiver circuit scheme. Use laser beams to transmit information between two locations no fibers need, a wireless technology communication over long distances, e.
Either the transmitter as well as the receiver are assembled around ic lm386, it is powered by a 9v battery. Project report on laser torch based voice transmitter and receiver. 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. Laser torch based voice transmitter and receiver full. Irda infra red data communication protocol implementation ir remote switch. 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. Most used to connect lan networks between buildings this is a cheap and secure way to send information without broadcasting as rf or wifi links. Long range burglar alarm using laser torch full circuit diagram. However, the 3volt laser torch after removal of its battery can be directly connected to the circuitwith the body of the torch connected to the emitter of bd9 and the springloaded lead protruding from inside the torch to circuit ground. Laser torch based voice transmitter and receiver electrical.
The more light on phototransistor, the more it conduct and vice versa. We connect a vl53l0x laser timeofflight sensor to an arduino to measure the liquid level in a tank using tof ranging. Long range burglar alarm using laser torch full circuit. Communication systems almost always break down into two parts. Abstractin this paper we designed the circuit, using that circuit we can communicate with our. Both the transmitter and the receiver are built around ic lm386, powered by a 9v battery. A laser torch can transmit light up to a distance of about 500 metres. A voice transmission circuit has been designed using an optocoupler or an optoisolator which transfers electrical signals between two isolated circuits by us. Liquid level sensing using a laser tof sensor project tutorial by team protocentral. In this regime, the laser is modulated with an audio signal and the receiver captures the beam directly. The receiver does not need any complicated alignment. Just keep the phototransistor oriented towards the remote transmitter s laser point and adjust the volume control for a clear. Using this circuit you can communicate with your neighbors wirelessly. The audio signal is mixed with the carrier beam and transmits through a laser torch.
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