HENDRA, J. Smart Free-Fall Experiment Apparatus Using Arduino, Infrared–Ultrasonic Sensors, and Bluetooth Data Logging. Edusainstika: Jurnal Pembelajaran MIPA, [S. l.], v. 5, n. 2, p. 70–78, 2025. Disponível em: https://ejournal.uinmybatusangkar.ac.id/ojs/index.php/Edusainstika/article/view/16256. Acesso em: 20 jan. 2026.