Febriyani Pratiwi, Ganjar, Roby Fenki Mahardika Prawiro, Erfiana Wahyuningsih, and Tri Nur Arifin. 2026. “Designing a Frequency Measurement Instrument Kit Based on the PIC16F628A Microcontroller”. International Journal of Science and Environment (IJSE) 6 (1):625-32. https://doi.org/10.51601/ijse.v6i1.380.