Arduino atmega328 based project Main features is:
- Real time clock, based on Timer1
- 4 buttons to control, duration of press is based on Timer2, implemented not as a matrix with check but as switches with PCINT2
- 220AC controlled by reley for indicating that alarm time has come
- LCD1602 through I^2C
- Temperature probe DS18
- EEPROM for saving settings
- Buzzer as audio indicator through tone()