CD-ROM
Perancangan dan pembuatan prototype sistem pengendali jembatan pendaratan speedboat menggunakan mikrokontroler (CD)
Speedboat is sea transportation means that connects one island to other island with near distance. To smooth speedboat transportation stream, it needs other supporting means, which one of them is speedboat landing bridge.
Since this speedboat landing bridge made is permanent in nature is not in accordance with natural condition, in this matter, when sea water subsiding occurs, the bridge cannot be functioned because the distance between sea water surface and bridge surface is high enough. So, in its use, it is often difficult for speedboat transportation service user when he or she will ride or go down from speedboat.
Viewed from background above, so author will design and make prototype of speedboat landing bridge automatic controlling system by using sistem minimum AT89C51. For its core, it is a system working principle. Microcontroller is the main controlling system. Driver motor 1 functions to move motor 1 to control bridge base. Bridge base will increase and decrease with the sensory reaction whether in rise condition or subsided condition. Whereas driver motor 2 is moving motor 2 that functions to regulate crossbar in front of speedboat landing bridge gate. The aim is to give warning to passenger that the system controlled will work, IC CD4066BC functions as switch that work automatically to turn on or turn off input from float sensor and also receive returned response. Analog data from sensor will be conversed to ADC to get digital data so it can be known and read by microcontroller. Output from microcontroller will control/activate DC motor systematically is in accordance with program command from the microcontroller. Buzzer is functioned as sign that landing bridge base will work.
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