Prior to working with this system we have to configure the real time and bell time values using a matrix keypad. The procedure for the configuration is given below: This system uses a power-supply block to drive all the circuit components, an 8051 microcontroller to control and manage bell timings, a real-time clock for accurate timing operation, a matrix keypad to enter and configure the bell timings and a seven-segment display to display the time and information. The operation of this system can be easily understood from the above block diagram, wherein the keypad entered timings are stored in the microcontroller, which are responsible for operating the bell based on the program of the microcontroller.
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