Automatic college Bell

1. Automatic college Bell
By Choudhary PooJA

2. Introduction
• A bell is a percussion instrument used in schools and colleges.
• This design takes over the task of ringing the bell in various institutions.
• The bell would ring automatically at the schedule time.

3. Block Diagram
Power Supply
LCD Display
ATMEGA8
Micro Controller
Buzzer
Crystal Oscillator

4. Features of Micro Controller
• Advanced RISC Architecture.
• Up to 16MIPS Throughput at 16 MHz
• 8K Bytes of In-System Self-Programmable Flash
• 512 Bytes EEPROM
• 1K Bytes Internal SRAM

5. LCD
• It is used to show current time and various messages.
• LCD (Liquid Crystal Display) screen is an electronic display module and
find a wide range of applications.
• A 16x2 LCD display is very basic module and is very commonly used in
various devices and circuits.

6. Crystal Oscillator
• It is used to provide external clock.
• It provides stable frequency oscillations.

7. Buzzer
• It gives the BEEP sound according to the given time.

8. Circuit Implementation