An air conditioner is an appliance, system, or mechanism designed to extract heat from an area using a refrigeration cycle. In construction, a complete system of heating, ventilation, and air conditioning is referred to as HVAC. Its purpose, in the home or in the car, is to provide comfort during hot days and nights. There are certain problems happen when user uses the air conditioner. The conventional air conditional uses more energy, need to pay more bills and waste the energy. This project mainly concern to use PIC to control NPN power transistor further drive air conditional and LEDs on. This situation happen when the sensor detected certain temperature and the movement. The value of environment temperature will display on a LCD screen. When sensor did not detect the movement and environment temperature is below the setting point so the air conditioner will off automatically.
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