Syahri Muharom, and Marcelinus Amalia Lamanele. 2018. “Rancang Bangun Mesin Pengering Biji Kopi Berbasis Mikrokontroler Atmega32”. SinarFe7 1 (1):36-41. https://journal.fortei7.org/index.php/sinarFe7/article/view/502.