Lay-Z is an Arduino based Wii Nunchuck and MotionPlus Reader board with Serial input, Analog inputs and Digital IOs.
You can use your Nunchuck as RC interface or MotionPlus as a Head Tracker with Lay-Z boards.
 

Requirements

• Wii Nunchuck or Motion Plus 
  Cabling depends your project
• 3.3v FTDI for loading the firmwares

Features

• Wii Female plug for all standard Wii equipment.
• Works with 3.3-14v
• 15mA current requirement
• 4 Analog input (or digital IO) for extra connections
• Standard Serial FTDI (3.3v) port for Arduino code updates and PC connection
• A button for code based configuration options
• 2 Digital IO on the supply port for direct RC transmitter connection over trainer port of tx.

Documents

• Schematic of Lay-Z
• Default firmware (RC interface with Nunchuck)
• Our forum pages