Show off your hardware-related projects!!

[caracalled]

I'm mainly talking about things like creating a new thing for yourself (maybe with something like Arduino and raspberry-pi?) but also anything in the direction of modding/repairing your own existing electronics! I mainly just mod and repair and I'd be super interested to see what other people create from scratch with those skills as well! (and also finding out about more fun things I could do hehe)
It's always so cool to see how people customize their own electronics and what community would that be more interesting for than this one? :D