Step 1: What you will need.
- First, and obviously, an old NES controller. If you don't have one that you are willing to modify, try a thrift store. The one I used here cost $3 or so.
- A non-powered USB hub. The one I chose has three ports on the front and one on the side, which is ideal.
- A USB memory key, as small as possible. The Verbatim Tuff N' Tiny key is perfect. I got a 4Gb key on sale for $15.
- Screwdriver (Phillips).
- Rotary tool (aka Dremel)
- Glue gun