Automatic School Bell

schematic

Description

This project is an Automatic School bell system. Such a system triggers a bell (or operates any other load) at predifined time. In this version some advanced features are introduced:

  • 16×2 LCD Display ( Displays current date, time and day)
  • 4×4 Keypad for Inputs
  • Stand alone product ( no PC required to program or maintain ringing schedule)
  • No battery required to maintain clock and ringing schedule
  • Variable ringing time
  • Max 10 bells can be set
  • Custom Weekend filters
  • Monthly OFF / Weekly OFF
  • Half Day
  • Total AC Power Handling : 1000W (240V 5A)
  • Connect as many AC electronic bells in parallel form
  • Built-in back up battery supply
  • Built in permanent memory for bell timings
  • Auto-memory scan on system startup

I used PIC18f4520 microcontroller as the brain of the system. RTC1307 IC is used to maintain the clock,date and day with a 3V backup voltage battery. Bell timings are stored in the internal EEPROM of mcu.

MCU is reading time from RTC through I2C Serial protocol and compares the current time with stored memory time in a continous while(1) loop.

MM74C922 decoder IC is used for keyboard. Reading the sixteen buttons is done using 4-bits output of decoder IC.

Photos

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KHOZA SD

im a student at MUT doing this design and i like to use this schematic, can i get the program for it my email adress is khozasibonisodan@gmail.com

anonymous

khoza, so basically you want to use someone’s project as your own. what have you came up with in this project?! i understand you want to use this schematic the way it is, but that is plagarism. sow us what you have done so far then we can see how we help you.

usman

i am university student .i am doing this project for my university final year project can you please email me the original i want to do little bit modification in this project .if i get success in this project it will implement in my university

usman

please email me at usman7668@gmail.com

daniel

hex file error

Pil Kim

Thank for your that important cod but it’s can’t open file cod because it’s error for open.
pleas you help send this for me .
my E-mail: Kimchandy66@yahoo.com
last wish you good luck all time and good health

Thank you.

sivasankar

kindly send us the automatic school bell schematic and program file sir

dammy

please email me the code through adamnda5@gmail.com

shubhamshubham davande

Sir can u please send mi C code for this project…please send me on email..
davandeshubham007@gmail.com

penjaga rtk

please email me the C code on email adhiwirianata@gmail.com. thanks before.

Oscar

How to modify the program if u need more bell to program then the basic 10

saurabh

plz email me at saurabhskhire@gmail.com on gmail for info of this project

Manan

Dear Sir and Mam
Please send me quotation for the same in details with all the requirements.

DAMITH DISSANAYAKA

Sir can u please send mi C code for this project…please send me on email..
damithnuwan7353@gmail.com

mncedisi

how are you sir can you plz email me the c language program of this project, that my email mftmtshali@gmail.com

AULA SRIANT

please send me the c code to my mail aula19189@gmail.com

SRIKANTH

PLEASE SEND ME C-CODE TO MY MAIL akula19189@gmail.com

elquicoballbe@yahoo.com.ar

please email me at elquicoballbe@yahoo.com.ar
error hex
thank you very much

ANAS P K

Please Send me the code to anaspk1@gmail.com, also please send me the full component price

grtgrte

Please Send me the code to grtgrte@yahoo.fr

Pramod gupta

I just the need the program or hex file for this project..can you mail me on gpramod09@gmail.com

SILAMBU

Please mail me the source code to my e-mail address electronicsempiremaker@gmail.com

Jahan zeb Gul

Hello everyone… I am the designer of this project. First of all thank you very much for liking the project. This project was done 4 Years ago and the final device is still installed in a School working perfectly. I receive alot of emails regarding the source code but unfortunately the code files are deleted because of some virus attack at that time… So source code files are not available… Some people are also having difficulty in running the demo in Proteus. I made a video for demo as well 3 years ago and published it on youtube. Here is the link if anyone wants to know how to set the bells etc…

https://www.youtube.com/watch?v=L_42vaPPU8M

Thanks again…

Sartaaj

please upload components list

VAN DINH

Please mail me the source code to my e-mail address:phbongson@gmail.com. Thank you.

Mubashir pmc

I need the program
Mubashirpmc@gmail.com
Please send

Dave Langdon

So many whiny would-be plagiarists! Thanks for posting this. I’m going to use the details for helping me with my Pic powered cuckoo clock. Again, thank you for sharing. The rest of you, stop spending time whining on the internet and spend more time learning about your subjects!

syed juned ali

what i have to do if i want to increase the numbers of bells from 10 to around 25?

Rida

please send mi C code for this project…please send me on email..
Soubhanaallah100@gmail.com

lailai

please,I can get traffic light controller complete source code with hex file and proteus simulation.If you will give for me this link or file , send me my emailaddress
lailaimyohtut123@gmail.com

Yvette

Please may you send me the source codes for this project

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