The first one is for someone coming in and the second one is for someone going out of the room. It consists of two transmitting infrared diodes and two receiving photodiodes. This system works on the principle of breaking an infrared beam of light, sensed by a photodiode. The performance of the system after test met design specifications. This was achieved by considering some factors such as economy, availability of components and research materials, efficiency, compatibility and portability and also durability in the design process. To this end, we model and design an automatic sliding door with a room light control system to provide the mentioned needs. So thus, the automatic gates are one of the examples that human nature invent to bring comfort and ease in its daily life. The man seeks ways to do things easily and which saves time. As a result of enhanced civilization and modernization, the human nature demands more comfort to his life. Automatic door is an automated movable barrier installed in the entry of a room or building to restrict access, provide ease of opening a door or provide visual privacy.
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