Power Pins

• VIN - This is the power pin. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 5V microcontroller like Arduino, use 5V
• 3V - This is the 3.3V output from the voltage regulator, you can grab up to 100mA from this if you like.
• GND - common ground for power and logic

I2C Logic Pins

Default address is 0x52 - this cannot be changed.

• SCL - I2C clock pin, connect to your microcontroller I2C clock line. This pin is level shifted so you can use 3-5V logic, and there's a 10K pullup on this pin.
• SDA - I2C data pin, connect to your microcontroller I2C data line. This pin is level shifted so you can use 3-5V logic, and there's a 10K pullup on this pin.
• STEMMA QT - These connectors allow you to connectors to dev boards with STEMMA QT connectors or to other things with various associated accessories

Wii Nunchuck Connector

Wii controllers use a standard I2C interface. We use extra thick 2.0mm PCBs for this breakout, and made cut-outs for the grabber-notches, so that the controller connection is snug, and wont rattle or come loose!

See the GIF for how to install. The notched side of the connector U goes on the side that says Notch Up!