S.SANDHYA; G.THEIVANATHAN; R.SHANKARI; P.GOVINDAMOORTHI. Coin Drop Mobile Charger using IR sensor. Journal of Electronic Design Engineering, [S. l.], v. 3, n. 3, p. 1–7, 2017. Disponível em: http://matjournals.co.in/index.php/JOEDE/article/view/6765. Acesso em: 10 apr. 2025.