I've got an Arduino Mega 2560 and a bag of both normal and UV LED's, and I'm relatively new to Arduino. I've been able to control them with serial (Mostly based on DarthTater's Morse Code program http://arduino.cc/forum/index.php/topic,8243.0.html) after the practice of blinking an led. Now I'd like to do something else. Does your community have any suggestions for a dude with a bag of assorted LED's and an Arduino?
Okay, here's the problem. I got my Arduino for Christmas, and I'm not even Twelve yet, so I don't have access to vast sums for resistors, LEDs and stuff. Can you recommend a 20 Dollar project?