Automatic School / College Bell using PIC Microcontroller

Here we are sharing a fully automatic and configurable bell which can be used in schools and colleges. It is made using commonly available microcontroller and other components.

Components Required

PIC 18F4550 16x2 LCD Display DS1307 or DS3232 or DS3231 32.768 kHz Crystal 16 MHz Crystal 4.7K Resistor - 7 10K Resistor 10K Preset 22pF Capacitor - 2 100nF Capacitor 4x4 Keypad 680R Resistor LED - 1 3V CMOS Battery BC548 1N4148 Relay (5V/12V)

Circuit Diagram

Automatic College Bell using Microcontroller -...