Emulates a DualShock 2 on a Teensy 2.0
Special thanks goes to the following projects for making this possible:
How to build a PS2 Bluetooth Adapter by Aaron Clovsky http://psx-scene.com/forums/f19/how-build-your-own-ps2-bluetooth-adapter-use-real-ps3-ps4-controllers-wirelessly-your-ps2-127728/
Teensy PS2 Controller Sim Firmware v2 by Johnny Chung Lee http://procrastineering.blogspot.com/2010/12/simulated-ps2-controller-for.html
Playstation Controller Extender by Micah Elizabeth Scott http://scanlime.org/2007/08/playstation-controller-extender
Interfacing a PS2 Controller @ curiousinventor.com http://store.curiousinventor.com/guides/PS2/
SNES to PSX: SNES controller to Playstation adapter by Raphaël Assénat http://www.raphnet.net/electronique/snes_to_psx/index_en.php
LilyPad pcsx2 plugin by ChickenLiver https://github.com/PCSX2/pcsx2/tree/master/plugins/LilyPad
PadSSSPSX pcsxr plugin by Nagisa https://github.com/tetious/pcsxr/tree/master/win32/plugins/PadSSSPSX