Design of a Temperature Control for a Solar Dehydrator

This work arises by the need to control the temperature in a fruit dehydrator, taking into account that the temperature must be at a suitable and constant level. To achieve the optimal fruit dehydration ratio, while allowing the system to become autonomous. In order to make this possible, the temperature control will be implemented by an Arduino microcontroller, which will measure the temperature using three thermocouples type J. These sensors will be in three different areas inside the dehydrator identifying variations of the temperature, in order to keep a constant temperature level inside the dehydrator during the process, two fans will be implemented which will allow to maintain a suitable temperature allowing the dehydration of different sorts of fruit. Therefore, the control will be developed by programming a microcontroller that will allow to modify as necessary the temperature suitable to dehydrate different types of fruit by modifying the temperature variable, accordingly to the fruit which is required to be dehydrated, as well as verifying the temperature constantly during a dehydration process, these will be programmable and performed with the help of a keyboard, where both temperature and percentage of dehydration will be displayed on a LCD screen (Liquid crystal display).