S.Sandhya, G.Theivanathan, R.Shankari, and P.Govindamoorthi. “Coin Drop Mobile Charger Using IR Sensor”. Journal of Electronic Design Engineering 3, no. 3 (September 11, 2017): 1–7. Accessed April 10, 2025. http://matjournals.co.in/index.php/JOEDE/article/view/6765.