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analog clock reader (Arduino + Wiimote IR camera)

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Published on Jan 4, 2012

The Nintendo Wii remote contains a beautiful little infrared camera that can track up to 4 moving infrared dots at 1024x768 resolution. In this setup, there are 4 IR LEDs pointing outward from one of these cameras, forming a beam that can be used to illuminate and detect reflective spots. The clock is outfitted with four pieces of retroreflective tape, whose locations are read by the camera and transmitted via I2C to an Arduino Duemilanove (ATmega328 microcontroller), which uses them to calculate the current time.

This was done as a final project for an Intro to C/Arduino course at UPenn, and was very much inspired by Johnny Chung Lee's fantastic work (if you haven't seen it, check out his virtual reality and interactive whiteboard projects at http://johnnylee.net/projects/wii/), as well as a Mechatronics course where we built hockey robots that used Wiimote cameras to figure out their positions on a rink.

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