Sistem Pengendalian Intensitas Cahaya pada Rumah Kaca Menggunakan Fotodioda Berbasis Mikrokontroler AT89S52

Abstract

This study is to explain about controlling light intensity system in greenhouse. To detect light intensity is used light sensor photodiode. If light in greenhouse is too high so roof of greenhouse is removed with black one, and if light intensity in greenhouse is too low so roof of greenhouse is removed with transparence one. To remove roof of greenhouse is used motor stepper. Motor stepper is controlled by driver motor stepper. This controlling light intensity system in greenhouse is completed with two photodiodes. If both of photodiodes is shining with sun light, so greenhouse roof will be removed with black one and lamp in greenhouse will be off as automatically , this condition is indicated light. If only one photodiode is shining sun light, so greenhouse roof will be removed with transparence one and lamp in greenhouse will be off. This condition is indicated clouded. If both of photodiodes is shining with sun light, so roof of greenhouse will be removed with transparence one and lamp in greenhouse will be on. This condition is indicated dark. To controlled lamp is used driver relay circuit. With this methods so controlling light intensity in greenhouse can be good.