Yes, I did. Queen size. DH cut plywood shape, I got foam, fabric, and the kit for making fabric buttons at Joann's. I sprayed adhesive on the foam, covered with the fabric, stapled to the back. DH drilled where I wanted the buttons, and I used pipe cleaners to pull the buttons through and anchor on the back.
Honestly, it turned out great, and is so much better than no headboard...