I am a fan of blue colored LED’s, LCD’s, any kind of light emitting source 🙂 , so when i stumbled on this project it got my eye immediately. The project features a Digital Clock based on Atmel Atmega8535 microcontroller. For displaying the info the circuit uses four, blue, 3mm, 7 segment LED modules. Three are used to display the hour and minutes, and the other one is used to display the status of the alarm: on or off. The clock uses a small lithium battery to keep the current time if power is lost. The alarm time and state are saved in EEPROM and restored after a power outage. If you would like to start building this Digital Clock follow the link at the bottom of this article.
Atmega8535 Digital Blue Clock