Guide Presented by

Mrs.Shaik Gulnaz V.Abhinav Kumar 11E31A0422

Asst.Professor K.Shiva Kumar 11E31A0423

K.Rajashekar 11E31A0424

K.Chaithanya Sree 11E31A0428

K.Pramitha 11E31A0429

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.

BLOCK DIAGRAM

POWER SUPPLY

Transformer In the power supply we use step down transformer.

It converts 230V Ac to 12V AC.

MICRO CONTROLLER We are using Atmega8 microcontroller.

Features of micro controller

Advanced RISC Architecture

Up to 16 MIPS Throughput at 16 MHz

8K Bytes of In-System Self-Programmable Flash

512 Bytes EEPROM

1K Byte Internal SRAM

LCD LED

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.

CRYSTAL OSCILLATOR It is used to provide external clock.

It provides stable frequency oscillations.

BUZZER It gives the BEEP sound according to the given time.

CIRCUIT IMPLEMENTATION

Hardware Design Soldering Part

EXECUTION Compiler/IDE (Integrated Development

Environment)

- Used Code Vision AVR (CVAVR)

Programmer- Pony Prog: For dumping the program into ATMEGA 8

USB Programmer

WORKING On the power supply of the circuit the bridge circuit

converts the ac supply in to dc supply and voltage

regulator regulates the supply.

We are using IC 7805 which will gives output as 5V This

voltage is used to display the LCD.

On the LCD we can able to view time format as

HH:MM:SS and DAY Number.

We programmed this project as to hear the Buzzer sound

every after one hour and we can display as per the

schedule in the program.

INITIAL DISPLAY

LECTURE 1

LUNCH BREAK

OFF TIME

FEATURES OF PROJECT

Powered by +5v & +12v.

Current consumption 0.45mA for microcontroller.

We can hear Buzzer sound every after one hour.

ADVANTAGES This project can be used in educational institutes,

colleges, schools.

This project can also be used in industries.

It is an automatic system.

Human errors can be avoided.

Safety is assured

APPLICATIONS Colleges, Schools.

Washing machine.

Microwave ovens.

Video recorders.

Security system.

Digital watches.

FUTURE SCOPE Automatic college bell system using Lab VIEW can be

extended for further development as there can be many

departments in a university at a distance in the same

campus and want to synchronize all department bells.

CONCLUSION Present day ringing the bell in colleges or schools are

carried out manually.

The main disadvantage of this is that one person has to be

alert for this.

To overcome from this, we have decided to prepare the

circuit which will be operated automatically and the

ringing of bell will start by its given time.

THANK YOU