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Lukito, Pandu, I Wayan Supardi, & Ni Nyoman Ratini.
" Design of a Heartbeat Detector Using a Photopletysmograph Method Based on an ATMega328 Microcontroller." <em>BULETIN FISIKA</em> [Online], 24.2 (2023): 135 – 141. Web. 29 Aug. 2026