Desenvolvimento de uma placa de circuito impresso de um sistema de controle automático para uma microcâmara climática

Abstract

This work focuses on the development of a Printed Circuit Board (PCB) for an automatic control system of relative humidity inside a climatic microchamber which is being developed by researchers at the Federal University of São Paulo (UNIFESP), Diadema Campus, in collaboration with researchers at the Federal University of Juiz de Fora (UFJF). The PCB currently controls a thermoelectric cooler in open loop, but it will soon control the thermoelectric cooler in closed loop as well. The developed PCB is double-sided so that it can be manufactured in one of the laboratories of the Faculty of Engineering at UFJF. It has four well-defined regions: i) power (including a high-temperature region), ii) analogue (signal conditioning and control), iii) digital (centred on an Arduino Nano board), and iv) power supplies. During the PCB design process, good routing practices were applied, including the creation of large copper areas which help to improve signal integrity and reduce electromagnetic interference. This work also presents some of the decisions that were made during the PCB routing process.