Prasetyo, Adi, Jamaaluddin Jamaaluddin, and Izza Anshory. “PCB (Printed Circuit Board) Etching Machine Using ESP32-Camera Based Internet Of Things”. Jurnal JEETech 4, no. 2 (November 4, 2023): 139-148. Accessed October 7, 2025. https://ejournal.ft-undar.ac.id/index.php/jeetech/article/view/217.