Numichrono

References:

RTC: DS3231MZ http://www.digikey.com/product-detail/en/DS3231MZ%2B/DS3231MZ%2B-ND/2754396

MCU: Atmega32U4

BUCK-BOOST:

http://blog.zakkemble.co.uk/diy-digital-wristwatch/

http://jared.geek.nz/2013/may/oled-watch

http://chronoduino.orcinus.me/index.php5?title=Main_Page

http://jared.geek.nz/2013/may/oled-watch

http://voodoomanmiracle.com/wp/?p=127

http://www.instructables.com/id/Make-your-own-smart-watch/?ALLSTEPS

http://www.instructables.com/id/Arduino-Watch-Build-Instructions/?ALLSTEPS

http://www.johngineer.com/blog/?p=1595