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The use of electric motors of the industrial world is as a motor for production equipment. One example of using an electric motor is a conveyor. The conveyor has a long operating time. Conveyors can move objects from one place to another. Therefore, the condition of the conveyor machine must be good so that there are no operational errors. Errors in conveyor operation can result in delays in the production process. From these problems, research is made on a controller and monitoring of electric motors on the conveyor based on current parameters. This electric motor monitoring is based on Programmable Logic Control. This system is designed by utilizing a Current Transformer to measure the current in each electric motor. This current condition detects the condition of the electric motor in real time. If there is a change in a current that is not in accordance with the normal current, the system will detect a disturbance. This system can also control the direction of motor rotation. This system can inform all forms of disturbances to electric motors in the form of indicators and graphs of current movements in real time.

Ineffective use of gun light by Air Traffic Controller on aerodrome control tower unit. As we know based on International Civil Aviation Organisation Annex 2 rules of the air, ATC on TWR unit use gun light to deliver clearance to pilot when the radio is failed. The clearance given by the controller is a light sign. For example, if the controller gives sign steady red light, that sign has two meanings, for the aircraft is in flight completely different from the aircraft still on the ground. Unfortunately, using gun light on a daylight pilot find difficulties locating the signal lamp. The intensity usually not as bright as we need. This case pilot will try to find another thing besides solving the radio problem at the same time they still have to land the aircraft. ATC can’t use higher intensity cause that may be dangerous for people to use. Purpose this journal is to prove the ineffective way gun light use.

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