If they didn’t use an entire browser to render the clock face this seems like it could be an Arduino/ESP32-esque project.
Driving HDMI is way harder then you would guess; extremely fast timing to hit. A naive framebuffer alone won't fit in RAM, whilst not strictly needed it would make it a hard challenge.
alt Hacker News
Driving HDMI is way harder then you would guess; extremely fast timing to hit. A naive framebuffer alone won't fit in RAM, whilst not strictly needed it would make it a hard challenge.