Nlaser torch based voice transmitter and receiver pdf

Can someone please tell me how do a laser torch based voice transmitter and receiver works. Simple circuits using only a handful of cheap parts. Laser communication transmitter and receiver design. See my later video showing modules made using these circuits. 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. Green laser levels require a laser level detector made to work with green lasers. Nasa goddard space flight center is developing a directdetection freespace laser communications transceiver test bed. Use laser beams to transmit information between two locations no fibres need, a wireless technology communication over long distances, e. Jan 27, 2017 photo detector at receiver detects the laser light and voice output through loud speaker. The reason why you power it up from a digital pin is to control its onoff states. 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. Optical transmitters having completed our discussion of the optical receiver, we now turn to the trans mitter.

Assemble the transmitter and receiver circuits on separate pcbs and enclose in suitable cabinets. Then, we focus on the devices used for the electricaltooptical conversion, namely, the laser and the modulator. Govinda1 waseem arshad2 santosh ram3 shashank agrawal4 1scse, university, vellore, india 2, 3, 4, sense, vit university vellore, india. The top countries of supplier is china, from which the percentage of wireless optical transmitter and receiver supply is 100% respectively.

Then the receiver will catch the light and demodulate it and drive the speaker. The laser transmitter is a masteroscillator power amplifier mopa configuration using a 1060 nm wavelength laser diode with a twostage multiwatt ytterbium fiber amplifier. The receiver circuit is build around a signal audio amplifier ic tda 7205. Transmitter generates sonetsdh compliant optical waveforms up to 12. 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. Asynchronous receivertransmitter uart is shortened to 3t16 t stands for the time length required for 1bit data transmission by the modulation circuit. The phototransistor of the receiver must be accurately oriented towards the laser beam from the torch. Receiver circuit of laser voice transmitter circuit. We start with a brief discussion of the transmitter specifications.

Wireless optical transmitter and receiver,dailianxu engineering. Therefore, the control circuit can be designed similar to that for a multimode transmitter. Scribd is the worlds largest social reading and publishing site. The receiver circuit uses an npn phototransistor as the light sensor that is followed by a twostage transistor preamplifier and tda2003based audio power amplifier.

This laser transmitter receiver use a laser torch as the carrier in the circuit. The transmitters pld15 contain an eled that can be coupled very efficiently into a singlemode fibre. The more light on phototransistor, the more it conduct and vice versa. The transmitter modulates power to a laser pointer with audio from a headphone jack.

This paper investigates the design of an amplifier using laser as transmitter and solar panel as receiver. Often both ends of a laser communication system will be equipped with a receiver and transmitter. Abstractin this paper we designed the circuit, using that circuit we can communicate with our. 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. Anitha introduction laser communications systems are wireless connections through the atmosphere. The hl700 is an easytouse tool that accurately measures elevations across the site, and is ideal for use with any rotating transmitter. Abstractin this paper we designed the circuit, using that circuit we can communicate with our neighbors wirelessly. Feb 27, 2010 yes, you need an audio input to the transmitter so it can modulate the light. Laser detectors, laser receivers, laser sensors, laser. Yes, you need an audio input to the transmitter so it can modulate the light. A communication system pretty much always breaks down to two parts, a transmitter and a receiver. Transmit voice,music,data via a laser beam with this transmitter and receiver. A wide variety of laser transmitter and receiver options are available to you, there are 690 suppliers who sells laser transmitter and receiver on, mainly located in asia.

The first circuit, which is similar to the receiver end, is the laser audio transmission circuit. The dlxwos155 series of products from dailianxu engineering co. Infrared beams are most often found on lasers used for outdoor work, such as grading, trenching, leveling driveways, laying pipe, or setting concrete forms. If you cant figure out how to transmit data with this schematic so nicely laid out for you then maybe. The transmitter is broken down into three circuits. 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. The receiver, shown in figure 2, is similar to the coherent detection. Objectives a laser communication system by using low cost laser torch and electronic equipment which can be got easily form local electronics and. A wide variety of wireless optical transmitter and receiver options are available to you, there are 753 suppliers who sells wireless optical transmitter and receiver on, mainly located in asia.

Laser torch based voice transmitter and receiver electrical. Receiver signal to noise ratios for ipda lidars using sine. In this example, a persons voice gets put into a conditioning circuit so that the full eight bit. For this project i am going to keep both of them very basic. Based on a flexible masteroscillator, poweramplifier mopa design, the transmitter is singlemode. Both the transmitter and receiver modules operate on 9 v batteries as well as ac adapters two adapters are included. Laser receiver module laser sensor nonmodulator transmitter. If there is any obstruction in the path of the laser beam, no sound will be heard from the receiver. Your cart will total 65 points that can be converted into a voucher of. In this example, a persons voice gets put into a conditioning circuit so that the full eight bit range of the analogue to digital converter is utilized. Directdetection freespace laser transceiver testbed.

Laser torch based voice transmitter and receiver k. A photo transistor detects light from the transmitter and allows it to conduct. Receiver module has an output that can be connected to an oscilloscope for analysis or to an amplified speaker system. Laser communication transmitter receiver circuit scheme. Presentation covers basic design details and requirements. Apply the audio signal at transmitter section, now you can listen the sound from speaker. Hello mr shahid manzoor, i am also working on the same project as my final year project, student of electronics engineering at pafkiet i have some queries and i reuqest you to guide me about my queries confusions related to this project so can you please contact me on my personal email or give me your. The input given is an mp3 song from a mobile phone which is a low signal input. It is then amplified by the amplifier so a high input signal is being generated. Dlxwos155 wireless optical transmitter and receiver brief introduction.

Laser torch based voice transmitter and receiver ppt presentation covers important information for understanding project over view. Laser torch audio transmitter receiver electronics. The receiver, shown in figure 2, is similar to the coherent detection receiver but without the local oscillator laser. I assembled both in minutes, and it was strange in a good way to hear music whenever i held the cell in the beam. Our transmitter is capable of transmitting variable mppm waveforms with 10 w average power at 1064 nm. Laser voice transmitter circuit engineering projects. This laser transmitter receiver circuit use light from a laser torch to transmit an receive signal from a distance up to 500 meters. The receiver circuit uses an npn phototransistor as the light sensor that is followed by a twostage transistor preamplifier and tda2003 based audio power amplifier. Wireless voice communication device design using laser torch. The top countries of suppliers are china, taiwan, china, and indonesia, from which the percentage of laser transmitter and receiver supply is 99%, 1%, and 1%. Ethernet transmitters receiver lasersdetector modules. Fulfillment by amazon fba is a service we offer sellers that lets them store their products in amazons fulfillment centers, and we directly pack, ship, and provide customer service for these products.

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. Design and implementation of mobile laser data transceiver. Freespace laser communication systems have the potential to provide flexible, highspeed connectivity suitable for longhaul intersatellite and deepspace links. The detector front end will receive the transmitted signal, decode it, and feed it to the receiving uart. As for the mysterious middle pin, nobody really knows why they put it. In the transmitter cabinet, fix two terminals for connecting the audio signal. A laser torch can transmit light up to a distance of about 500 metres. Laser torchbased voice free download as powerpoint presentation. This transmitter works by modulating the amplitude of the laser based on the amplitude of the audio signal that we are trying to transmit. Wireless optical transmitter and receiver,dailianxu. Laser communication transmitter receiver schematic. Stateoftheart designs can leverage many of the recent advances in optical communication technologies that. Simplified block diagram of an ipda lidar with a coherent receiver the sinewave modulation approach modulates the laser intensity with a sinusoidal signal with 50% duty cycle.

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. Wireless voice communication device design using laser. What is it with all these students that dont know shit about electronics. Laser communication system detailed project with circuit. Either the transmitter as well as the receiver are assembled around ic lm386, it is powered by a 9v battery. In this work, we demonstrate an inpbased pic transmitter comprising a widely tunable 1550nm laser, a highspeed soa, a highspeed machzehnder modulator mzm, and a twosection highpower. Keep in mind that laser detectors made for red laser levels only work with red laser levels. Deepak kumar, kundan kumar singh and anand mohan 2 ii.

Make sure that distance between transmitter and receiver sections is below 4 meters. Feb 27, 20 transmit voice,music,data via a laser beam with this transmitter and 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. By buying this product you can collect up to 65 loyalty points. The transmitter involves a signal processing circuit, and a laser. The spectra precision laser hl700 laserometer, a highly versatile laser receiver for basic and advanced leveling and aligning applications, is designed for general, concrete and site preparation contractors. Our transmitter design is similar to that for the 5w ppm transmitter435 developed for the mars laser communications demonstration mlcd. For these applications, powerefficient transmitter and receiver designs are essential for costeffective implementation. The following figure explains the main diagram of free space optics fso systems. Nov 08, 2011 the transmitter modulates power to a laser pointer with audio from a headphone jack. The emitting diode is driven to transmit an optical signal to the receiver. Presentation covers basic design details and requirements list of. Once the digital signal is obtained by the adc, the mcu passes the signal to the uart. Photo detector at receiver detects the laser light and voice output through loud speaker.