Design and Development of Temperature and Relative Humidity Controller for Spreat Culti

Abstract

A seedling for consumption is popular food at the present because it contains high advantages and nutritive value. It can easily be cooked with various methods, so the consumer’s demand is increased. However, there are difficult procedures for seedling culture. For example, it needs closely control, cost of production is high, and factors on seedling growth cannot be controlled such as environment, water amount, humidity, temperature, insect pest, and weather. These factors affect seedling culture. Hence, this research aimed to design temperature and relative humidity controller for seedling culture to be able to control temperature and humidity by controller automatically. The seedling culture controller consist of these seven components: 1) control system 2) temperature and relative humidity sensor 3) ultrasonic humidifier 4) water storage 5) humidifier fan 6) dehumidifier fan 7) seedling tray. According to the experiment result, it suggests that the proper temperature is 26-30 degree Celsius, with 83-87% of relative humidity. This automatic seedling culture controller can control temperature and humidity as the seedling needed.