This was just a quick project after realizing how comfortable it is to have a flashlight attached to your jacket. It proved to be ideal for long hikes in the cold woods when you rather want to put your hands into your pockets.
I used a schematic I found online and it works very well. The batteries last quite a while and the flashlight has just the right brightness - It illuminates the way nicely without glaring everybody.
I did the design with KiCad. I also had a lot of fun while making the silkscreen pattern.