This project describes an innovative multimedia thermometer of great visual impact. The temperature is shown on an ordinary TV with crisp, full color graphics. To add more magic, pictures can be animated, and stereo CD-quality audio announcements can accompany every temperature change. Pictures can be varied according to the application.
When the system is placed in a shop or mall, logos and product advertisements are a perfect complement to temperature information. For home use, photos of the kids at the beach or –should the temperature drop- in the making of Mr. Snowman are a nice gift for Grandma. Other application areas include hotels, airports, sport resorts, and tourist sites.Despite of its rich feature set, the DVD-thermometer is an amazingly simple design that requires very few components thanks to an ingenious mechanism. And it is hundreds of dollars cheaper than the typical PC-centric solution.
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The circuit is battery operated, and fits comfortably a small plastic box, located in front of an ordinary DVD-player. A switch and an infrared LED peep out of the box. The DVD-player is loaded with a disk, pre-recorded with all of the pictures corresponding to different temperatures, in a well-known order. Acting as an intelligent infrared remote control, the DVD-thermometer directs the player, selecting the scene that matches ambient temperature.
I made the DVD-thermometer at home, for the fun of doing it, with no special tools other than a soldering iron, a multimeter, a PC with ordinary CD-R burner, and the Motorola QT demo board. I submitted it to the Flash Innovations Design Contest sponsored by Motorola, and it won the Distinctive Excellence Prize.
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