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T1. Introduction of Wii remote

T1. Introduction of Wii remote ELEC2807 Integrated Project (InfoE) Something you should know … Nicknamed “ Wiimote ” The controller of the Wii video game console Powered by 2 AA batteries Bluetooth communication Basic features of Wii remote Button 11 buttons

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T1. Introduction of Wii remote

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  1. T1. Introduction of Wii remote ELEC2807 Integrated Project (InfoE)

  2. Something you should know … Nicknamed “Wiimote” The controller of the Wiivideo game console Powered by 2 AA batteries Bluetooth communication

  3. Basic features of Wii remote • Button • 11 buttons • Some buttons have special usage, like pressing 1 and 2 together to start Bluetooth pairing • Sensing • Accelerometer • Infrared Camera • Feedback • Rumble • LED display • Built-in speaker

  4. Sensing – Accelerometer (1) • Use the ADXL330 accelerometer • To sense acceleration along three axes of the Wii remote • The accelerometer measures linear acceleration in a free fall frame of reference • Which means, if the Wii remote is in free fall, it will report zero acceleration. At rest, it will report an upward acceleration (+Z, when horizontal) equal to the acceleration due to gravity

  5. Sensing – Accelerometer (2) • One typical usage is using accelerometer to capture and analysis user’s motion Motion Data Analysis Result Golf Baseball

  6. Sensing – Infrared Camera(1) • Resolution of the infrared camera inside Wii remote can be up to 1024 x 768 • Capable of tracking up to 4 moving objects • Field of view is about 33 degrees horizontally and 23 degrees vertically • Infrared light sources with wavelength other than 940nm will be filtered by the infrared filter

  7. Sensing – Infrared Camera(2) • The infrared camera and infrared emitter (e.g. infrared LED) can act as a pointing device • The Wii Sensor bar, which is technically an array of infrared LED. The relative movement of the infrared LED will be used for cursor position update.

  8. Feedback - Rumble • Wii remote will vibrate when the rumble function is activated • Usually, game use the rumble function to indicate a crash or being hit.

  9. Feedback – LED Display • 4 blue LEDs are on the front of the Wii remote • During initialization state (Bluetooth pairing), these 4 LEDs will blink. • The number of blinking LED indicate the battery power : • 4 LEDs : ~ 100% • 3 LEDs : ~ 75% • 2 LEDs : ~ 50% • 1 LED : ~ 25%

  10. Feedback - Built-in speaker • Wii remote has a small low-quality 21mm speaker, used for short sound effects during game play • The sound is streamed directly from the host (e.g. The Wii console, PC etc)

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