The High Accurate Automatic School Bell Controller Based On Arduino Uno DS1307 I2C Real-time Clock. JTMMX [Internet]. 24 Juli 2023 [dikutip 25 Agustus 2025];4(1):17-26. Tersedia pada: https://journal.ubpkarawang.ac.id/index.php/JTMMX/article/view/3499