Our Autodesk Labs offices are located on the third floor of our Civic Center South building on the Autodesk campus in San Rafael. The majority of our walls are whiteboards. Developers routinely draw software architecture diagrams on our walls. The other day we decided to create the world's least expensive sun dial.
We drew a red rectangle on the window. As sunlight hits the window. the shadow of the rectangle casts upon the whiteboard. We marked the location of the shadow with its associated time.
It will be fun to see the projection's position change as we approach December 22.
What a green idea. :-) This clock uses no electricity. It's our version of a solar clock. Thinking green is alive in the lab on a Friday.