The emergence and development of pharos is of major significance to the safety of ships sailing through the night. Beacon was installed for ship search ships sail safely at night in some kind of traffic lights on the beacon. Color and flashing frequency under light emitted during the night, to reach the required angle and visibility distance. Pharos has a fixed beacon, a light beacon buoys, light vessels and 4 species. Fixed beacon, light buoys and light vessels are used for navigation and warnings of beacons. Lighthouse on the sea day and night send identification signals, hazard warning for position determination of ship and to ships. Beacon lights operating on battery power. Small lighthouse to use solar cells, large Lighthouse diesel generator is used as the primary power source.
This graduation project could Pharos change as the light intensity control navigation light flashing frequency changes automatically, to achieve a clear navigation for ships at sea. Also designed three keys that can artificially control the Flash frequency changes of Pharos, in special emergency situations, can Flash more flexible control of Pharos to meet practical demand.Graduation design based on the microcontroller, using change resistance as the light intensity of the photosensitive resistance itself also changed characteristic, a/d converters analog to digital, then pass single-chip for processing. This design is made from transistors, diodes, relays to achieve control of the Pharos.