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							LUKITO, Pandu; 						SUPARDI, I Wayan; 						RATINI, Ni Nyoman.
 Design of a Heartbeat Detector Using a Photopletysmograph Method Based on an ATMega328 Microcontroller.
<strong>BULETIN FISIKA</strong>, [S.l.], v. 24, n. 2, p. 135 – 141, aug. 2023.
ISSN 2580-9733.
Available at: &lt;<a href="https://ojs.unud.ac.id/index.php/buletinfisika/article/view/84515" target="_new">https://ojs.unud.ac.id/index.php/buletinfisika/article/view/84515</a>&gt;. Date accessed: 30 aug. 2026.
doi: <a href="https://doi.org/10.24843/BF.2023.V24.i02.p10">https://doi.org/10.24843/BF.2023.V24.i02.p10</a>.