[youtube=http://www.youtube.com/watch?v=-Rf5zs7VEFM]
As many of you have mentioned, there are a lot of projects that are built with their own microprocessors, and are simply overkill. Here’s a reminder that we can do some pretty fun stuff light synchronized light shows without going overboard. This light show is controlled directly via the printer port on a computer. Sure you can’t un plug it and run it free standing, but you can build it for roughly $20.
The table for electronic dreams is an interactive table that is sensitive to electric activity. Though it looks similar to the table built by EMSL, this one lights up based on electromagnetic fields. You can get the schematics and such from the instructable, but there is also a video located at the bottom of the project’s home page. It would be really cool if the effect could be localized more.
Here’s another POV project for you. It’s pretty big, at 1 meter in diameter, not quite as large as the stupidly huge one. What is interesting about this display is that it has a dual motor set up. The original motor didn’t quite have the power to get the display up to the required speed. A second one was added as the shaft of the rotor. Yes, one motor is actually spinning another motor that is spinning the display. Well, it’s hard to tell from the description. The original motor might be completely unused, but left in place.
[youtube=http://www.youtube.com/watch?v=x24ESDCkmN0]
Ok, there aren’t any usefull applications we can think of for this one, but we want one really badly. This is a combination of a miniPOV, some UV LEDs, a CNC rig, and some glow in the dark paper. The Ghost matrix works similar to a dot matrix printer where it flashes the UV light to activate the paper. The final effect is very nice. Great job on this one.
[via Laughing Squid]
Another Cornell final project, Weather Canvas aims to make watching the weather a little more pleasant. Data is captured via a thermometer, humidity sensor, anemometer, and a Hotwheels radar gun turned precipitation sensor. Once it’s captured, it’s transmitted to the LED matrix inside which displays pretty patterns to convey the weather conditions. They have set images, like icons, that mean different things.
There have been several attempts at bringing Dungeons & Dragons up to date with modern technology. Most attempts have been in the form of computer games that somehow fail to capture the essential experience. This attempt, however seems to add some techie flair to while keeping the game the same. [Itay] has built some digital dice. Simply choose how many sides you want your dice to have, then give it a shake. OK, a random number generator isn’t that groundbreaking, but he did have to do some pretty intense soldering. The LED matrix is pretty cool, but we like looking at the back. You can see it in the video after the break.
[youtube=http://www.youtube.com/watch?v=DqboDjQX0UE]
[Kyri] has made a simple circuit to do color detection using an RGB LED. Simply set the LED to the color you want to detect then wave the object over it. Another LED will light up if the object is the same color as the LED. The detection is done by a photo resistor. The theory is that an object will reflect more of the light that matches its surface color. She shows that this kind of detection could be useful for sorting in robotics.
