Church bell Controller




This circuit is a church bell controller. Basic component is an ATmega32 microcontroller. At the circuit 1 24LC32 eeprom memories is being used.

As control I created a menu who will be appeared on 4×20 LCD (Liquid Crystal Display). The menu browsing can be done by 6 buttons at the face of the circuit’s box (Menu, Up, Down, Enter, Start, Stop). The all firmware binds about 30Kbytes flash memory and can be increased by adding new features-functions. This program has been written in C with CVAVR compiler.

The idea of this circuit is being given by a friend of mine who has an foundry and he is building bells. I have made the PCB by my self.


  • More 75 different melodies (ADAM, PANYGJRJKO, AGJORJKO, etc)
  • Control of electrometrical clock of church with the production of pulse of duration 1Sec each one minute.
  • Automatic correction in case of power loss.
  • Percussion of clock each half but also entire hours, with possibility of choice of hours of silence (for tourist regions and hours of common quietness).
  • Manual correction of electromechanical clock.
  • All regulations become with the help of guidance (menu, up, down, enter, start, stop)
  • When it runs a rhythm we have the possibility of increase or decrease her speed, the information will stored in memory 24LC32.
  • Display time (DS1307), with backup battery.
  • All the in formations are displayed on 4X20 LCD.
  • Control up to 5 bells and 1 clock.
  • The user create his own program












  • solomon

    how can make a simple door alarm that is controlled by computers

    5 years ago
  • Alexis Fernando

    In this schematic diagram connection of C4 has not been shown. Kindly give the details through my mail id also send me the program also if you have. Thank you.

    4 years ago
  • can i get the hex file … send it to my mai

    3 years ago
  • staro

    can i get the hex file … send it to my mai

    2 years ago
  • maria mavrantza

    where are you from:

    5 months ago
    • This is designed in Greece. You can contact the author.

      5 months ago
  • ilias mavrantzas

    how much does it cost

    5 months ago
    • There is a telephone on the first photo. You should contact the creator.

      5 months ago

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