Frima Yudha, Putra Stevano, and Ridwan Abdullah Sani. “IMPLEMENTASI SENSOR ULTRASONIK HC-SR04 SEBAGAI SENSOR PARKIR MOBIL BERBASIS ARDUINO”. EINSTEIN (e-Journal) 5, no. 3 (January 9, 2019). Accessed December 15, 2025. https://jurnal.unimed.ac.id/2012/index.php/einsten/article/view/12002.