A short post on how to wire your Nunchuck without cutting the cord! My breadboard wires just fit inside the small holes of the nunchuck connector, see image below. Although there are 5 holes, you only have to use the four holes on the corners.

Wiring is as follows:

  • Green is I2C Data, goes to pin 20 on an Arduino Mega
  • Yellow is I2C Clock, goes to pin 21 on an Arduino Mega
  • Orange is +5V (or actually +3.3V, but +5V seems to work…)
  • White is ground

Use the code at http://www.arduino.cc/playground/Main/WiiChuckClass to interface you nunchuck without cutting the cord. Have fun!