Optimization of Automatic Temperature Control System on Dehydrator

Traditional drying methods, such as sun drying, have several drawbacks, including dependence on weather conditions and long processing times. This final project aims to design and develop a dehumidifier device based on the Mamdani fuzzy logic system to process overripe bananas (locally known as pisang masak sehari) into dried banana (pisang sale). This type of banana ripens quickly, spoils easily, and is less favored in the market, thus requiring proper processing to increase its economic value. The developed device is equipped with an 850-watt heating element, an AC fan for air circulation, and three DS18B20 temperature sensors installed at three different points to ensure even heat distribution. The Mamdani fuzzy logic system is used to maintain a stable drying temperature within the range of 60–65°C. Test results show that the device is capable of drying bananas in 6 hours. The drying chamber temperature was maintained consistently at 61–63°C