-and finally, some pictures. Most of the parts are 3D printed, except for the clamp, which is off the shelf from Aliexpress. The 3D printed enclosure just snaps onto that.

Some time back, I put some time into actualizing an idea I'd had for awhile. After a ton of revisions, have a nice looking headphone hanger that tells my PC to switch the audio to my headphones when I pick them up. Couldn't live w/o it now, super happy with the skills I learned and the final result.