Kasilingam, Gowrishankar, K Nithiyananthan, Priyanka Ramesh Mani, and Sunil Thomas. “GSM Based Dual Power Enhanced LED Display Notice Board With Motion Detector”. International Journal of Engineering & Technology 7, no. 2.8 (March 19, 2018): 559–566. Accessed May 4, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/10521.