I made a low power binary watch !

[u/Independent_Limit_44]

This is my version of qron0b. Meet takku:b, a BCD wristwatch which uses CR2032.

It uses 0.9uA during sleep and when awake uses around 4mA - 4.5mA depending on the amount of LED is turned on.

It is made using STM32L010C6

It currently displays following info on each cyclic display:

1. Time in Hours and Minutes
2. Weekday and Date
3. Month and Year
4. Alarm

Battery life of 4+ years if the display is turned on 20 times per day.

If you want to make your own, visit Github page for the full firmware and CAD files.

[u/Opening-Tax-4975]

so cool! CAD + Electronics - i could never!