The Pluto programmable digital watch is a wonderful project from Lukas / carrotIndustries.
Pluto replaces the PCB of the Casio F-91W with a custom one containing a TI MCU, a digital magnetometer (compass) and a 38 kHz infrared receiver for software updates and communication.
However in 2019 it is no longer manufacturable due to it's magnetometer lack of availability as a standalone component.
This project mainly aims to replace the deprecated MAG3110 chip with the ST-LIS3MDL.
We are also going to try some tricks to make the PCB cheap and easy to get made.
Enjoy this project?