International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 04 | Apr -2017
p-ISSN: 2395-0072
www.irjet.net
PC to PC LASER Communication Manureet Seehra1, Anushka2,Joohee Gupta3, Anurag Bhushan Verma4 1Department
of Electronics and Communication Engineering
IMS Engineering College, Ghaziabad ---------------------------------------------------------------------***--------------------------------------------------------------------medicine, consumer electronics, law enforcement, military equipment, entertainment and manufacturing. Furthermore the free space optical communication involves use of infrared laser light or LED. LED is used mainly for low data rate communication over short distance. The Infrared Data Association (IrDA) provides specifications for a complete set of protocols. Main feature of this type of wireless optical communication is physically securing data transfer, line-ofsight (LOS) and very low bit error rate (BER) that makes it very efficient.
Abstract - This paper illustrates the concept of free space optical communication in order to fabricate physical connections between two systems which have a line of sight arrangement, using serial communication for transfer of data. MAXIM Corporation’s IC MAX 232 is used, it needs only a single power supply of 5V (for TTL to RS-232 and viceversa) level conversion and then an optical transmitter circuit is used to transmit data via fiber optic cable. There is a combination of laser and photodiode for transmitting and receiving the data respectively. We point the laser beam of transmitting module to fall on the photodiode of the receiving module connected to the other PC and vice-versa. The whole set up is kept in a dark box preferably black in color to avoid any reflection. The communication over the short distance of 2-3 m is possible using IR diodes. The range could be increased up to few meters, using the laser diode module in place of IR LEDs. The only need for fiber optic communication is felt because it is cheaper and corresponds to fewer losses.
Figure 1: IrDA via USB
Keywords: free space optical communication (FSO), LASER, serial communication, photodiode.
2. OPERATION
1.INTRODUCTION
In this project our main concern is to transmit data serially between two PCs placed at a distance. This can be achieved easily by fabricating the following parts-
For several years the use of laser light has been merely for piping light around the dark corners or inaccessible places to allow the hidden objects to be seen, but now laser has evolved its use and its advantage in comparison to conventional coaxial cable or twisted wire pairs is manifold. It has evolved its use in field of telecommunication, by carrying information over larger distances. The laser light has less transmission losses and is not susceptible to electromagnetic interference. It is highly focused and due to its focusing nature it has various applications in the field of surgery. Today, lasers have become one of the world’s most efficient technologies and have found its use in industries ranging from information technology to telecommunications,
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Transformer. Power supply Rectifier PCB Schmitt trigger MAX232 RS232 LASER Photodiode
The transformer is used to regulate power from 220V supply to 5V or 12V. Further the power supply circuit has voltage
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