Arduino uno User Manual

Figure 26—A Nintendo Nunchuk controller
Wiring a Wii Nunchuk
Wiring a Nunchuk to an Arduino really is a piece of cake. You don’t have to
open the Nunchuk or modify it in any way. You only have to put four wires
into its connector and then connect the wires to the Arduino:
GND
3.3V Data
Clock
It has six connectors, but only four of them are active:
GND, 3.3V, Data, and Clock. Here’s the pinout of a
Nunchuk plug:
Put a wire into each connector and then connect the
wires to the Arduino. Connect the data wire to analog pin 4 and the clock
wire to analog pin 5. The GND wire has to be connected to the Arduino’s
ground pin, and the 3.3V wire belongs to the Arduino’s 3.3V pin.
Chapter 9. Tinkering with the Wii Nunchuk • 146
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Arduino uno Specifications

General

Form factor	Arduino
Certification	RoHS, FC, CE
Processor model	-
Processor frequency	- MHz
Microcontroller model	ATmega328
Microcontroller frequency	16 MHz
DC input voltage	7-12 V
Operating voltage	5 V
DC current per I/O pin	40 mA
Flash memory	0.032 MB
Maximum internal memory	- GB
SRAM (Static Random Access Memory)	2 KB
EEPROM (Electrically Erasable Programmable Read-Only Memory)	1 KB
Wi-Fi	No
Number of analog I/O pins	6
Number of digital I/O pins	14

Weight and Dimensions

Board dimensions	53.4 x 68.6 mm