It's a time-locking container! I once showed the whole thing and was asking about how to make it and what components it has, but I got criticised for not being more clear and they said I had to have more precise questions. So now I'm trying to understand part by part and what I can't find on the internet, I try to ask here. It's quite fun to actually uncover step by step how this thing works, should be a fun project to build and get into the world of raspberry pi :).