My earphone cords are constantly getting tangled when I try to wrap it up in my case, so I decided to take advantage of my Techshop membership and create a custom retracter to fit my case. The concept would be fairly simple: create a circular plastic insert that would spin to retract the cable in an nice coil.
Step 1: Materials
I start with the original round case that came with my Meelec earphones. Any round case should do. I also use a sheet of 1/8" Acrylic from Lowes to form the retractor.