Yudha, F. S., Yulkifli, Y., Asrizal, A., & Darvina, Y. (2024). Design of a Free Fall Motion Experiment Using E18-D80NK Proximity and HC-SR04 Ultrasonic Sensors: An IoT-Based Approach. Journal of Experimental and Applied Physics, 2(4). https://doi.org/10.24036/jeap.v2i4.76