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MP49 Music Transmission and reception with high S/N ratio using fiber optic communication Technical Specifications: Title of the project : Music Transmission and reception with high S/N ratio using fiber optic communication Domain : Optical Communication Systems Design Power Supply : +5V, 500mA Regulated Power Supply Display : LED LED : 5mm Applications : Telecommunications, Fiber optics, wireless music system Developed By : M/S Wine Yard Technologies Phone : 040- 6464 6363, www.WineYardProjects.com www.wineyard.in MP49 ABSTRACT: Fiber Optics is the technique of transmitting light through transparent, flexible fibers of glass or plastic. An optical fiber acts as a waveguide, or "light pipe", to transmit light between the two ends of the fiber. The field of applied science and engineering concerned with the design and application of optical fibers is known as fiber optics. Optical fibers are widely used in fiberoptic communications, which permits transmission over longer distances and at higher bandwidths (data rates) than other forms of communication By using this project audio musical notes can be generated and heard up using fiber optic communication through optical cable. The circuit can be divided into two parts: transmitter and receiver. The music transmitter works for a 9V battery, while the music receiver works for regulated 9V to 12V. The transmitter uses popular melody generator IC UM66 that can continuously generate musical tones. The output of this music melody generator is fed to the driver stage to get the maximum range. An LED is connected in the Transmitter section. This LED flickers according to the musical tones generated by UM66 IC, indicating modulation. Two LEDs are connected in series. For maximum sound transmission these should be oriented towards IR phototransistor L14F1. The music receiver uses popular op-amp IC μA741 and audio-frequency amplifier IC LM386 along with phototransistor L14F1 and some discrete components. The melody generated by IC UM66 is transmitted through IR LEDs, received by phototransistor and fed to pin 2 of IC μA741. Its gain can be varied using potentiometer VR1. The output of IC μA741 is fed to IC LM386 via capacitor C5 and potentiometer. The melody produced is heard through the receiver’s loudspeaker. Potentiometer VR2 is used to control the volume of loudspeaker (8-ohm, 1W). Switching off the power supply stops melody generation. This project uses regulated 5V, 500mA power supply. 7805 three terminal voltage regulator is used for voltage regulation. Bridge type full wave rectifier is used to rectify the ac out put of secondary of 230/12V step down transformer. www.wineyard.in MP49 Block Diagram: Music Transmission using Fiber Optic communication www.wineyard.in MP49 www.wineyard.in