Construction Of Railway Door Automation Prototypes Using Arduino, Servo Motors and Ultrasonic Sensors : Konstruksi Prototipe Otomatisasi Pintu Kereta Api Menggunakan Arduino, Motor Servo, dan Sensor Ultrasonik. Digitalzone [Internet]. 2023 May 27 [cited 2026 Jul. 14];14(1):1-12. Available from: https://journal.unilak.ac.id/index.php/dz/article/view/13584