Rheoscopic Disc Coffee Table

finished disc

When I last visited the Carnegie Science Center in Pittsburgh, I saw a really beautiful interactive fluid exhibit demonstrating the swirly, churning patterns of turbulence. The fluid was contained in a 3-foot-diameter disc, about 2 inches deep with a sturdy glass top. A large Lazy Susan bearing supported the disc... Read more »

My Scanning Electron Microscope

krasnow

I decided to design and build a scanning electron microscope (SEM) in my home workshop to see if it was even possible. Spoiler alert: it is. I didn’t originally intend to create an SEM that could compare to a $75,000 entry-level commercial model, but the project turned out more successful... Read more »