PANGGABEAN, J. F. . Design and Manufacture of Number of People Counting Devices Using the AT89S52 Microcontroller. Jurnal ICT : Information and Communication Technologies, [S. l.], v. 13, n. 1, p. 47–50, 2022. DOI: 10.35335/jict.v11i2.18. Disponível em: https://www.ejournal.marqchainstitute.or.id/index.php/JICT/article/view/18. Acesso em: 30 jul. 2026.