Hendra, J. (2025). Smart Free-Fall Experiment Apparatus Using Arduino, Infrared–Ultrasonic Sensors, and Bluetooth Data Logging. Edusainstika: Jurnal Pembelajaran MIPA, 5(2), 70–78. Retrieved from https://ejournal.uinmybatusangkar.ac.id/ojs/index.php/Edusainstika/article/view/16256