Customized MP3 Players
Some people call it “Retro”, some call it custom, and most people just call it cool. There is groups out there who have repurposed their old Nintendo Entertainment System (NES) controllers. Instead of being a video game controller, the NES controller is being modified into an MP3 player. And since simple MP3 players have become so cheap to buy, the modification is seen as a cheap project. I do not know all of the technical details of the project, but essentially you get an old NES controller and open it up to remove the original circuit board. You also open up the MP3 player and remove its circuit from the casing. And somewhere in there, you attach the MP3 circuit board into the controller casing and wire the buttons to control the MP3 player.
This video doesn’t go into to much detail, and why would they? They want to keep the secrets to themselves and maybe sell some modded NES controllers to people who want them. But this may be only partially true, as there are other instruction web sites that have the plans to these.
Anyways there are other MP3 player mods out there, but this one seems to be one of the more popular.
Enjoy the video: