Effendi , Jeffrey Christian, Retno Devita, and Ondara Eka Putra. “Rancang Bangun Celengan Interaktif Berbasis Mikrokontroler Dan Android”. Journal of Computer Scine and Information Technology 10, no. 1 (May 21, 2026). Accessed May 23, 2026. https://jcsitech-upiyptk.org/ojs/index.php/jcsitech/article/view/152.