Devakate Atul Balaso, Londhe Sarita Dhanaji, Patil Dipali Netaji. Automatic College Bell Using Raspberry-Pi. ijetst [Internet]. 2016Jun.30 [cited 2024Nov.27];3(06):4086-9. Available from: http://igmpublication.org/ijetst.in/index.php/ijetst/article/view/1091