UV Exposure Box Project with timer

https://www.electronics-lab.com/uv-exposure-box-project-timer/

This is a nice build of a small UV exposure box using UV LEDs and Arduino by Elias Zacarias. The details are available on Part 1 and Part 2 posts of his blog.damnsoft.org. Design files are open source and uploaded to github.com. The boards are designed on KiCAD and code is for Arduino.