Show HN: I built an Open Source screen timer for the m5stickc (Arduino)

I've never posted on ShowHN before, but I wanted to share my Xmas 2025 project; to try a new approach to controlling our kids screen time.

This also involved massively over-engineering a solution in order to play with a shiny new gadget (and avoid the in laws at Christmas, obviously)

I've shared some learnings on AI coding with embedded devices, and how I approached the product design/hardware selection side of things.

The Web App is at https://screenie.org - and I'm Open Sourcing the device and web app code later today (links to follow on that site)