It's easier than you might think! These days it's pretty easy to get low volume circuit boards made. Then, with a cheap 3D printer, you could make plastic cas

It's easier than you might think! These days it's pretty easy to get low volume circuit boards made. Then, with a cheap 3D printer, you could make plastic cases (or plastic molds for silicone bands, etc.). Check out https://tindie.com/ https://tindie.com/ if you want to be inspired by other makers.