Estudo comparativo dos modos da PPG para medição de sinais de FC utilizando Arduino

This paper presents a comparative study between the transmission and reflection modes of photoplethysmography to measure heart rate signals. In this study, a circuit for heart rate acquisition and measurement was developed, which was integrated to the Arduino to process those signals. Samples of three different individuals were analyzed, and the results showed that the reflexive mode of PPG has a greater stability when measuring HR.