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The Nintendo Wii

By Daniel Turner

D. Infrared Sensor Bar
The accelerometers in the controls gauge movement but not position relative to the TV screen. So the Wii comes with a "sensor bar," to be placed at the top or bottom of the screen. The bar sends out an infrared signal, which is picked up by detectors at the front of the Wii Remote. The Remote uses distance and angle information to triangulate its location, which it sends, along with acceleration data, to the console.