My wife has been very supportive of my hyperspin build in my garage. Currently its just a 4-player control panel plugged into my laptop running hyperspin but I spend about half my nights out in the garage playing away. She doesn't share my enthusiasm with all my accomplishments but is genuinely happy that I'm happy. When I freaked out that I finally got Daphne working, didn't phase her in the slightest.
She did appreciate all the things I am learning from this hobby as well as the fun my kids will be having. Getting LEDblinky working with all the buttons ( 37 buttons + trackball) won her over a bit, as well.
I'd love it if she were a little more passionate about video games but my kids love it and I can't complain.