Kamolan, Aries, and Limbran Sampebatu. “Rancang Bangun Prototipe Pengaman Ruangan Dengan Input Kode PIN Dan Multi Sensor Berbasis Mikrokontroller”. Jurnal Ampere 6, no. 1 (June 30, 2021): 22–31. Accessed May 9, 2024. https://jurnal.univpgri-palembang.ac.id/index.php/ampere/article/view/5980.