Hariyadi A, Darmono H, Addarani AM. Design a 4-Sided Proximity Sensor on a Car Using Ultrasonic. jartel [Internet]. 2026 Sep. 30 [cited 2026 Oct. 8];16(3):248-56. Available from: https://jurnal.polinema.ac.id/index.php/jartel/article/view/10181