i cant find a video of the hacker badge working anymore but here are some pictures of when i assembled them back in august 2016
it's kind of like a defcon-like badge but in a formfactor that can be used with a safety pin to attach it to clothing and minimal component count and easy to hand solder and fabricate with single-layer pcbs
4 buttons and a fully addressable 8x8 led matrix with nothing more than a single atmega328
https://computerfairi.es/media/KozR8eq176VumGRHXro https://computerfairi.es/media/oPiVENJZGYPIcAToZc4 https://computerfairi.es/media/qk5aCdCw1yScFeokzD8
@squirrel
It has reminded me of this project that I did several years ago, it is my desk clock/calendar.
https://queer.town/media/bFyYQI7AG88MRtQBLag