Vermes
Advanced Member level 4
The heart of this simple device is Atmega48V. This version is perfect for the watch, because it works with tension starting from 1,8V.
RTC PCF8563 is responsible for telling the time.
In order to display the time, a button should be pressed. It is placed in the right side of the case.
In first place hours are displayed and then minutes in second place.
Current consumption when LEDs are on is about 2mA.
When the button is off, the processor changes its mode into Power down. Current consumption is about 1uA then.
The watch is powered by CR2032 battery.
Link to original thread - Zegarek binarny na rękę
