, P. K. N. S. M. Design and Development of Cordless Multidoor Alarm System Using NE555 Timer. International Journal on Recent and Innovation Trends in Computing and Communication, [S. l.], v. 2, n. 4, p. 729–732, 2014. DOI: 10.17762/ijritcc.v2i4.3047. Disponível em: https://ijritcc.org/index.php/ijritcc/article/view/3047. Acesso em: 25 sep. 2025.