Sensor Watch is a board replacement for the classic Casio F‑91W wristwatch. It is powered by a Microchip SAM L22 microcontroller with built-in segment LCD controller. You can write your own programs for the watch using the provided watch library, program the watch over USB using the built-in UF2 bootloader, and then install the board in your existing watch case to run your own software on your wrist.
Just installed this bad boy yesterday. It's still a 72 segment casio watch, but now it has a countdown timer, temperature sensor, tide predictions, shows the sunrise/sunset times, lets me flick through different timezones, can even generate 2FA codes, and still has a battery life measured in years.
@kota – September 29, 2024