Tagged “reverse_engineering”

1. Repairing Wii nunchuk
   • 2010 January 25
   • technology,
   • games,
   • reverse_engineering,
   • computers,
   • embedded_computing

   Our Wii nunchuk broke. After disassembly, it was obvious that two of the wires in the connector end had broken off. I immediately did a search on the internet for information, and found useful diagrams at wiire.org. The problem I had was that the wire colors I had did not match the colors that they had posted. After disassembling both the controller and the connector, I mapped out the appropriate colors for my particular controller. If you have to repair your Wii Nunchuk, I suggest that you do the same to ensure that the wires are mapped to the correct pins. In particular, on the Wiire site, the red wire was connected to the +3V pin. However, on my controller, the red wire was connected to the clock line.

   Wiimote Bus Pins (6-pin proprietary connector on Wiimote)

   Looking into Wiimote (or at the exposed pins on the nunchuk connector):

   `

   ---

   | 1 3 5 | | 2 4 6 | |---| `

   * 1 (Red wire) - +3V - (Brown on my system)

   * 2 (Yellow wire) - Clk (Blue on mine)

   * 3 (Red wire) - Attachment detection? (No connection on mine)

   * 4 (No wire) - Unknown (unconnected at Nunchuk connector) (No connection)

   * 5 (Green wire) - Data - (Red on mine)

   * 6 (White wire) - GND - (Yellow on mine)

   * The shield wire (white on mine) was soldered to the metal housing.

   Wiimote Bus Pins (linear connector on Nunchuk PCB)

   . _ _ _ _ _ _ 1|_|_|_|_|_|_|6

   * 1 (Red wire) - +3V - (Brown on mine)

   * 2 (no wire) - N/C

   * 3 (Yellow wire) - Clk - (Blue on mine)

   * 4 (Green wire) - Data - (Red on mine)

   * 5 (White wire) - GND - (Yellow on mine)

   * 6 (Black wire) - Shield (GND) - (White on mine)

   Note that the +3v was labeled on the controller board, and was the pin closest to the cable. Another way over verifying this is to note that pin 2 has no wire going to it.

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