Uso da plataforma Arduino no desenvolvimento de calorímetro didático

Abstract

The high cost of maintenance and acquisition of isothermal calorimeters differential is often an obstacle to educational institutions. Thus, this work was carried out to develop a low cost calorimeter using the Arduino platform. The system built was controlled by the Arduino platform connected to power source by a 9-volt and 2 DS18B20 sensors connected to the analog port of the same that collect temperature information. The code embedded in Arduino performs the reading of the sensors and sends this information already processed for the display. It also has an agitator attached to the cover for efficient homogenization of the mixture within. To determine the heat capacity is achieved using the equation of heat bullet. The results showed that the calorimeter built is feasible, presenting accurate with heat capacity of 16.14 cal / ° C ± 0.02 and presents low cost compared to calorimeters commonly found in the domestic market. In this way, the machine built is an efficient and economical alternative to be used for teaching and research.