Comment by zonkerdonker

If you're into the custom PCB design, I highly recommend Carl Bugeja: https://youtube.com/@carlbugeja He has lots of super interesting projects using micromagnetics, motors, flappers, and the like.

If you liked the part where he machined the housing, check out Clickspring. I think it's fair to say he is the greatest machinist currently active on YouTube, both in videography and storytelling, and in actual skill. https://youtube.com/@clickspring