Automatic College Bell Using Raspberry-Pi

The world over the decades has made considerable advancement in automation, au-tomation is employed in
every sector whether it is home or industry. Here a new and inexpensive design is being presented. This design
a tremendous use at primary and secondary school levels as well as in colleges where the teaching sections
can span over eight periods including breaks. The advantage of this design is that the bell rings at the start of
each period without any human intervention to a great degree of accuracy and hence takes over the manual
task of switching on/off the college bell with respect to time. It uses Real Time Clock (DS1307) which tracks
the real time. The scheduled time results are compared with that of a clock, however, some drift is noticed,
which is negligible. The Raspberry-pi is used to control all the functions, it gets the time through the keypad
and stores it in its memory.