Month: December 2011

Seeing EM Waves With a Single LED

Radio whiz Greg Charvat just published this video showing off a very cool experiment with the low-cost coffee can radar system he and co-workers developed, in the fall of 2010, for MIT’s open courseware initiative. In the video, Greg describes and demonstrates a simple circuit that causes a red/green LED on the receiving antenna to glow one color when the amplitude of the received wave is positive, and another when it is negative…

How-To: Flavored Lip Gloss

This is a perfect project for stocking stuffers or small gifts for groups of friends. Brooke of Cheeky Kitchen shares how she and her daughter made flavored lip gloss using simple grocery and craft store ingredients. See how it came together over on her blog. I love her ideas for making holiday-themed flavors (including mistletoe!).