Bayu Septiawan, Akbar NR, Habibi FN. Design and Development of a Free-Fall Experiment Apparatus Based on a Photodiode Sensor. IJEI [Internet]. 2025 Aug. 31 [cited 2026 Jan. 13];1(2):31-6. Available from: https://journals.widhatulfaeha.id/index.php/jpkjl/article/view/60