Abstract: A movable bridge or drawbridge is a type of bridge that can be raised to allow the smooth passage of boats or ships beneath it. In this paper a fully automated bridge is proposed by using microcontroller and PLC thereby replacing the manual system which is currently used. The idea is to automate the process of ship detection, opening or closing of the bridge, controlling the signals and road barriers.
Keywords: PLC module, drawbridge, Johnsons motor, Ladder Logic
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