We all know how sweet sleep can be in the morning. Every last minute counts… If there are kids around then things get different. Simply speaking – they dictate when to wake up and get up. Most frequently this is because kids don’t have a sense of time. So Mike decided to add a little control to kids wake process.

He built an attiny25 based clock called OK Wake. It has a NXP PCF8523 RTC running on it. As kids cant tell time there is no a display just dual color LED. Device simply indicates three parts of day – night, twilight and dawn. Each of them is set to particular time for instance if wake time is 6am, then twilight starts at 5:30am with slow red blink. When time reaches wake time LED turns green wit h”breathing” blink. Kids are great at lights – so when LED turns green its OK to start buzzing arround the house