I actually built this cache last summer, but still get tons of requests for instructions on how to make it. I didn’t document everything as I went, but this should help people who are interested in building something similar.
I’m somewhat new to using an Arduino, but am a software developer by day, so that’s helped my learning a bit. I have a woodshop in my basement and have made some craftsman style furniture as a hobby. I’ve translated those hobbies into cache container creations.