S.Sandhya, G.Theivanathan, R.Shankari, P.Govindamoorthi. Coin Drop Mobile Charger using IR sensor. JOEDE [Internet]. 2017 Sep. 11 [cited 2025 May 12];3(3):1-7. Available from: https://www.matjournals.co.in/index.php/JOEDE/article/view/6765