Just whistle to change channels

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RFID in Japan reports on an electronic tag (the yellow piece) which can be attached to your tv remote control. The black piece is a whistle. When you use the whistle, the tag hears the sound and responds to it by making a another sound, lighting a LED, and changing the channel (I hope I got that straight).

tag-for-remote.jpg

This system may be good for some purposes -- before RFID-based solutions are widespread.

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