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The setup is based on the concept of free space optical communication. In this paper, communication between PC to PC using LASER light is established. The project uses IC MAX 232, which needs only a single power supply of 5V (for TTL to RS-232 and vice-versa level conversion). The communication over the short distance of 2-3 m is possible using IR diodes. The range could be increased up to hundred meters, using the laser diode module in place of IR LEDs. The laser module used is easily available as laser pointer (having about 3 mW power output). The laser beam of one module is pointed on to the photodiode of another module connected to other PC and vice-versa.
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