I’ve got a trello board full of ideas and resources, but there are a few that have stuck around long term:
The Pinball Project has been a long running, off and on, project. Been pretty comprehensively documented here. It comes and goes as I have available time. I’ve generally struggled with the electric side of things, but I’ve been learning more as I go.
I periodically go looking into making a unique pair of entirely custom (and nice enough for regular wear) prescription eyeglass frames. I’ve got some doodles, and done some research on design constraints, but haven’t gone too far.
A modular pack and storage system design. Building dedicated storage pouches bags and rolls that integrate in a systematic fashion with more general pieces of different sizes to let me easily throw together what I need for whatever I’m doing.