Digital Dice

dnd

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.

Continue reading “Digital Dice”

Color detection using an RGB LED

[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.