How to use a Playstation 2 controller on a Playstation 3 - Quora
How To Connect A PS1 & PS2 Controller To PS3! - YouTube
PS1 & PS2 Wireless Playstation controller - Next Gen by Retro Fighters — Kickstarter
Convert PS3 controller to PS2 controller - Project Guidance - Arduino Forum
Amazon.com: Mcbazel Playstation 2 Controller to USB Adapter for PC or Playstation 3 Converter Cable for Sony DualShock PS2 PS3 Controllers (NOT Compatible with Dancing Mat Guitar Hero) : Video Games
Wireless Controller For PS2/PS1 Gamepad Dual Vibration Shock For Sony Playstation 2 Joypad Joystick Controle USB PC Game Console