Comprehensive example: AVR Microcontroller (ATmega16) Perpetual calendar (temperature alarm clock year month day hour minute second week)

Function Description:

LCD1602 LCD display year, month, day, hour, minute, second, week, temperature, three buttons control time and date adjustment and alarm settings.

 

Three buttons:

1. "school Hour" key, adjust the second, minute, hour, week, day, month, year, minute, hour, hour, and out of school when you press the button;

2. "Add/enable the alarm function", Press this key in school mode to add a value, press this key in non-school mode to display the alarm time and enable the alarm function (the screen displays the letter );

3. Press the "Reduce/Close alarm function" key to reduce the value by one, press this key in non-school mode to disable the alarm function (the screen letter A disappears );