Suseno, J.E. et al. 2025. Smart Fish Feeder by Measuring the Number of Pond Water Surface Vibrations Based on the Fish Hunger Levels. Jurnal Penelitian Pendidikan IPA. 11, 3 (Mar. 2025), 261–266. DOI:https://doi.org/10.29303/jppipa.v11i3.10342.