Mulyahani, Alvina, Ibrahim Ibrahim, and Yuliarman Saragih Saragih. “Sistem Buka Tutup Pintu Otomatis Dengan Sensor Ultrasonik”. Jurnal Ilmiah Wahana Pendidikan 9, no. 23 (December 30, 2023): 126-134. Accessed May 25, 2026. https://jurnal.peneliti.net/index.php/JIWP/article/view/5478.