, Pabitra Kumar Nandi, Samiran Maiti. “Design and Development of Cordless Multidoor Alarm System Using NE555 Timer”. International Journal on Recent and Innovation Trends in Computing and Communication 2, no. 4 (April 30, 2014): 729–732. Accessed September 25, 2025. https://ijritcc.org/index.php/ijritcc/article/view/3047.