Make Pt0165
Eric writes –

Over the past few weeks I built a 30″ tree ornament to go on a tree in front of my house. It uses 16 high-output red LEDs, an AVR ATTiny861 to do the animation (and dimming), and a ring made from electrical conduit. The link details the construction process, including a parts list, the algorithms used, and construction photos

Ring of Fire – Link.