INTERNATIONAL JOURNAL OF LATEST TECHNOLOGY IN ENGINEERING,

MANAGEMENT & APPLIED SCIENCE (IJLTEMAS)

ISSN 2278-2540 | DOI: 10.51583/IJLTEMAS | Volume XIII, Issue X, October 2024

www.ijltemas.in Page 7

Design and Development of a Low Cost Smart Electronic School

Bell

Kazi Wohiduzzaman, Rahmot Ullah, Ashit Sharkar

Department of Electrical and Electronic Engineering

operated manpower. There is a controller machine, where each class can be set up as desired and from this machine one speaker

will be installed in each class. Bell will play in every room through the speakers. The machine will be equipped with a

microphone that allows the headmaster or anyone to send the message to all classes simultaneously or to any class separately. The

system is made by establishing a serial interface between PIC microcontroller (PIC16F877A) and a Real Time Clock (RTC) is

designed with the help of PIC 16F72 module and the LCD display units provide real time and class time separately. The software

coding part is done using micro C and hardware implementation is done using the components. The main advantage of this

project is due to very easy circuit operation it is easy to operate, cost effective and can be password protected to avoid

unauthorized access.

Keywords: Smart, Bell, LED, LCD, Microcontroller, Relay, Automatic, Time Display, RTC, PIC, and Switch.

I. Introduction

proposed system is very important in schools, colleges and also any kinds of classes. Ooperation of this automatic instrument

(electronic bell) must have to be executed with an accurate time controller in an inexpensive way. Electronic automatic bell system

is designed for school/college bells to make school/college bells automated. The primary objective of designing this project is to

reduce the human intervention for the purpose of manual switching operation of a bell. Because of this manual switching we are

having an improper and inaccurate operation of time. So, a system should be designed in such a way that it is exactly dependent on

the real time clock and the switching of the bell should be controlled automatically without human intervention. In addition, the

system should be designed in such a way thatwe can store the schedule of whole day or week and able to change it as per our

requirement. Moreover, the use of this device for multi-stored and large-scale schools and colleges will play a very beneficial role.

II. Literature Review

In recent decades, several school/college bell systems have been tested, some proving more functional than others traditional

the C language or assembly language for controlling the circuit and it uses Real Time Clock (DS1307) which tracks the real time

[1][2].

Circuit uses a programmed microcontroller chip to schedule the school teaching and break periods so that for every start or end of

a period a bell is automatically rang. This design finds a tremendous use at primary and secondary school levels where the

teaching sections can span over eight periods including breaks [4][5]. Another Arduino based college bell circuit used three major

components which are IC RTCDS1307, Arduino Uno Board, and 16x2 LCD modules. Arduino is used for reading time from

ds1307 and display it on 16x2 LCD. A buzzer is also used for alarm indication, which beeps when alarm is activated,

simultaneously voice module will read out the data displayed on the LCD module [3]. While there are solutions available in

market to automate this task, they are also cumbersome to operate and overpriced for the limited features they offer. They use

DS3231 RTC module for timekeeping and HC-05 Bluetooth module for wireless communication. This design provides multiple

INTERNATIONAL JOURNAL OF LATEST TECHNOLOGY IN ENGINEERING,

MANAGEMENT & APPLIED SCIENCE (IJLTEMAS)

ISSN 2278-2540 | DOI: 10.51583/IJLTEMAS | Volume XIII, Issue X, October 2024

www.ijltemas.in Page 8

controller based on ESP32 and DS3231 Real Time Clock module implemented with using Wi-Fi to correct the system time

whenever switched OFF and ON despite of that the accuracy of the DS3231 RTC is +-40 seconds per year with the absence of the

Internet. The Bluetooth part of ESP32 is used to configure the system by inserting timetable of the school, the time delay for

ringing bell, offset time for the country, and configuring SSID and PASS of the router [8]. An electric bell is used as alarm, which

will ring when the alarm is activated, and so the date and time will be displayed on the LCD module. The bell would continue to

ring for 10 seconds in every block of our college simultaneously by transferring the information via IoT, which will indicate the

students and faculty of the institutions about the completion of a particular session in all the blocks in a simultaneous manner [9].

The bell rings at the start of every period without any human intervention to a great degree of accuracy and hence succeeds the

manual task of switching on/off the college bell on-time. This project uses LAN to work. Both Hardware and the App should be

connected to the same Wi-Fi network [10].

PIC microcontroller which keeps the system in idle state when it is not in use [13]. GSM module are use for sending and

receiving the message, once the period is set, GSM module sends message to that particular faculty, when class begins; It

additionally changes the information in the notice board through straightforward SMS [14].

III. Working Methodology

The total system is designed in four basic parts. Firstly, the power supplies that supply power all of circuits. Secondly (RTC) real

time digital clock circuit with which time data has been taken. Then the main controller part is design with microcontroller and the

last part of the system is amplifier circuit and sound unit and it is the main output section of this proposed system. The circuit

concept is quite simple. First AC current to the pin is plugged into the primary part of the transformer. The primary part of the

transformer has been rated at 220 volts and the secondary part has been converted 220 volts to 12 volts. A full wave bridge rectifier

gives 12 volts AC voltage to 12 volts DC voltage. From that 12 volts DC to 5 volts by voltage regulator IC has been generated. By

INTERNATIONAL JOURNAL OF LATEST TECHNOLOGY IN ENGINEERING,

MANAGEMENT & APPLIED SCIENCE (IJLTEMAS)

ISSN 2278-2540 | DOI: 10.51583/IJLTEMAS | Volume XIII, Issue X, October 2024

www.ijltemas.in Page 9

Working Principle

The operation of the proposed system is very simple. To install the device in a class, one speaker should be installed in each class.

Then the sound goes from that amplifier to the speaker that is installed in the classroom. And it goes at the time that is set.

Fig. 4. Circuit Diagram of power Section.

the computer to the microcontroller IC using a writer. Then we powered the circuit, digital clock circuit and all the parts are

integrated in the circuit according to the controller diagram. We checked the digital clock first then checked the main controller

circuit. Then we set three times in the controller circuit. When the time is set, we can hear the speaker’s sound through the

INTERNATIONAL JOURNAL OF LATEST TECHNOLOGY IN ENGINEERING,

MANAGEMENT & APPLIED SCIENCE (IJLTEMAS)

ISSN 2278-2540 | DOI: 10.51583/IJLTEMAS | Volume XIII, Issue X, October 2024

www.ijltemas.in Page 10

Fig. 7. Real time Project circuit.

IV. Result Analysis

After implementing all the components in electronic strip board, we tested the projects step by step and got the expected results.

After giving power supply to the kit, firstly we checked the digital clock, and the digital clock is working properly. Then we set

the main controller circuit three times. The speakers also rang according to the set three times. Finally we attached the

microphone to the amplifier and checked that it was ringing. We written the program in such a way that the bell should ring

V. Conclusion

Bells are a very significant to all educational institutions. It can manage and control class schedule with proper time slotting. This

microcontroller based automatic belling system able to provide bells at specific time periods mange by authorized person. In this

work, simple smart electronic school/college bell is developed using internal code which is fully meet the system’s goal. The

INTERNATIONAL JOURNAL OF LATEST TECHNOLOGY IN ENGINEERING,

MANAGEMENT & APPLIED SCIENCE (IJLTEMAS)

ISSN 2278-2540 | DOI: 10.51583/IJLTEMAS | Volume XIII, Issue X, October 2024

www.ijltemas.in Page 11

interval. Therefore, from the results obtained, it can be concluded that the aim of this work has been practically and theoretically

achieved. In addition this electronic bell sound system is controllable; the authorized person can manage volume as per demand,

and also this project can use alternative power source like, solar energy.

8. Riyadh Zaghlool Mahmood, “High Accurate Automatic School Bell Controller Based On ESP-32 Wi-Fi” Technium,