The High Accurate Automatic School Bell Controller Based On Arduino Uno DS1307 I2C Real-time Clock. Jurnal Teknik Mesin Mechanical Xplore, [S. l.], v. 4, n. 1, p. 17–26, 2023. DOI: 10.36805/jtmmx.v4i1.3499. Disponível em: https://journal.ubpkarawang.ac.id/index.php/JTMMX/article/view/3499. Acesso em: 25 agu. 2025.