Hafizah, H, A Amrullah, Z Panjaitan, and R I GINTING. “Aplikasi Alarm Pergantian Jam Belajar Menggunakan Teknik Counter Berbasis Adruino”. Jurnal MESIL (Mesin Elektro Sipil) 2, no. 2 (December 30, 2021): 63–68. Accessed July 13, 2025. https://jurnal.ceredindonesia.or.id/index.php/mesil/article/view/590.