Design and Fabrication of Heart Rate and Oxygen Saturation Measurement Device using LED-LED Configuration and to Study Correlation of PPG Signal Amplitude with Breathing Rate. Pakistan Journal of Scientific Research, [S. l.], v. 3, n. 1, p. 113–118, 2023. DOI: 10.57041/vol3iss1pp113-118. Disponível em: https://paas-pk.org/index.php/pjosr/article/view/1883. Acesso em: 16 feb. 2026.