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							DWIJAPUTRA, IGN Agung; 						SATRIYA WIBAWA, I Made; 						WENDRI, Nyoman.
 Designing CCTV Working Optimization System as Room Security Using Passive Infrared (PIR) Sensor Based on AT89S52 Microcontroller.
<strong>BULETIN FISIKA</strong>, [S.l.], v. 19, n. 2, p. 46-51, aug. 2018.
ISSN 2580-9733.
Available at: &lt;<a href="https://ojs.unud.ac.id/index.php/buletinfisika/article/view/38604" target="_new">https://ojs.unud.ac.id/index.php/buletinfisika/article/view/38604</a>&gt;. Date accessed: 01 sep. 2026.