Locking and unlocking of doors in hostel as a daily routine becomes a problem as students always tend to miss all the keys. Which causes a security risk if new lock is not purchased on time or if one acts irresponsible towards it.
A locking and unlocking system integrated on doors so that one does not need to carry keys with him/her where one could set or change their password /pattern to lock or unlock the doors.
There would be sensors which would activate with a certain pattern and activate the motor which would drive a nut and bolt mechanism to open or close the door by turning clockwise or anticlockwise.