The ChronoWatch X2040 is a DIY wristwatch built around the Waveshare RP2040-Touch-LCD-1.28 board, a 3D-printed case designed in Tinkercad, and a 3.7V LiPo battery. The firmware, written using the Pico C/C++ SDK, supports time/date display in 12/24-hour formats, multiple watch faces, brightness control, stopwatch, screen rotation, and a touch interface. The UF2 binary and 3D files are free on GitHub, while the source code is available for $4.99. Assembly and flashing instructions are hosted on Hackster.io.
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