摘要：Scientific writing is about the design and analysis of an automatic light controldevices using the interface that is connected to a computer system as thecontroller of the system that will be used to control objects such as lightingcontrol. Currently most of the hotels to turn off and turn on the lights is done bymanually via the switch. The author makes automatic light DB25 connectorinterface for ease of die and turn on the lights first floor hotel room until thethird floor. In this study, the authors illustrated using a model created andimplemented using Borland Delphi program, especially for lighting in everycorridor.. The circuit is made using a voltage of 5V and the source of the LEDvoltage of 2.5 V. This tool works by using algorithms and data presentation tooltrials. The author suggests two points better on the placement of each LED usinga voltage of 4V floor, because if the voltage obtained from the LED is less than2.5 V, the LED will be dim. This automatic lighting circuits using a voltage ofapproximately 5V computer so that the mock making use of the LED can workoptimally.
