Electronic Church Bell Controller

This circuit is a church bell controller. Basic component is an ATmega32 microcontroller. At the circuit 2 24LC32 eeprom memories is being used, the 1st for internal standard melodies and the 2nd one is for user’s compositions. This feature will be provided in the future.

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 19Kbytes flash memory and can be increased by adding new features-functions. This program has been writen in C in CVAVR compiler.

The idea of this circuit is being given by a friend of Antonis who has an foundry and he is building bells. Antonis also made a PCB:


  1. More 32 different melodies ( ADAM, PANYGJRJKO, AGJORJKO, etc)
  2. Control of electrometrical clock of church with the production of pulse of duration 1Sec each one minute.
  3. Automatic correction in case of power loss.
  4. 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).
  5. Manual correction of electromechanical clock.
  6. All regulations become with the help of guidance (menu, up, down, enter, start, stop)
  7. When it runs a rhythm we have the possibility of increase or decrease her speed,the information will stored in memory 24LC32.
  8. Display of temperature (DS1621).
  9. Display time (DS1307), with backup battery.
  10. All the in formations are displayed on 4X20 LCD.
  11. Control up to 6 bells.

Here is the software: bell_control_atmega128.zip. Please note that this software is made for a ATMega128.

Designed by Antonis Pontikakis

Leave a Reply

Your email address will not be published. Required fields are marked *