FAQ

How long does the battery last?

Right now the attiny binary watch draws 44uA when on sleep mode. This means that a regular CR2032 lasts for about 6 months.

How can I set the watch time?

This is one of the main drawbacks of this design. In order to set the time on the watch the code needs to be reuploaded (so you need to be near a computer that has the Arduino IDE installed).

Can I use other ATTINY chips?

The code fits into the ATTINY13 and does not use any function specific to the chip, so if the pinout is the same and you can upload Arduino files to it then it should work. I havent tried it yet.