Madona P, Pratiwi CA. Akuisisi Data Sinyal Photoplethysmograph (PPG) Menggunakan Photodioda. elementer [Internet]. 2016 Nov. 30 [cited 2024 Jul. 3];2(2):32-41. Available from: https://jurnal.pcr.ac.id/index.php/elementer/article/view/187