TL;DR
The ChronoWatch X2040 is a DIY watch project that utilizes a Raspberry Pi RP2040 microcontroller and a Waveshare RP2040-Touch-LCD-1.28 round display. Designed by Vishal Soni, the project simplifies watch building by using off-the-shelf components, including a 3D-printed case and a 3.7V lithium polymer (LiPo) battery. Instead of creating a custom circuit board, Soni opted for the Waveshare display board, which is cost-effective and allows him to focus on programming the watch's firmware using the Pico C/C++ SDK.