AUTOMATIC BELL SYSTEM FOR SCHOOLS/ COLLEGES
ABSTRACT
The
project is designed to operate an electric bell number of times as required in
an institution. It overcomes the difficulties of switching the bell ON/OFF manually.
This proposed has an inbuilt real time clock (RTC) to keep tracking the time
and thus to switch ON/OFF the load accordingly.
The
project uses a real time clock (RTC) interfaced to a microcontroller of 8051
family. While the set time equals to the real time, then microcontroller gives
command to the corresponding relay to turn ON the bell and then another command
to switch OFF as per the program. Multiple ON/OFF time entry is the biggest
advantage with this project. A matrix keypad helps entering the time. A
7-sement display is interfaced to the microcontroller to display time.
Further
the project can be enhanced by interfacing a GSM modem to the existing project
so that the complete control of the bell can be done by sending an SMS to the
control unit.
BLOCK DIAGRAM
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