Equipamento didático para o controle da temperatura da água por meio da plataforma Arduino

Abstract

Although there is a growing supply of engineering courses in the country it is common to see the universities below the infrastructure required for these courses, among many other problems. The aim of this study was to develop an equipment for educational purposes in the control of water temperature for use as Bain-Marie, using Arduino microcontroller platform and Peltier cell. The thermal container for the water storage has 1031 cm3 and the desired temperature for the water was obtained through the control of Peltier cell. It has the characteristic of so much heat as cool the water, by reversing the polarity of the electric current flow through a reversible two relay contacts controlled by Arduino. The equipment built was capable of achieving temperatures ranging from 11.1 to 91.5 degrees. It was observed that the minimum temperature is directly related to the ambient temperature, because the minimum value observed is close to 10° C unless this. The equipment has great accuracy in maintaining temperature, varying no more than ←1° C to desired temperature by the user, to a range between 15° C and 91.5° C. Therefore, the didactic equipment proposed for the water temperature control use as a Bain-Marie was efficient, precise and inexpensive.