Perhaps nothing added quite so much to the charm of vacuum tube circuits from back in the heyday of the vacuum tube as did the “Magic Eye” indicating tube. With the ghostly green glow of its circular ...

Magic Eye tubes were popular as tuning guides on old-school radio gear. However, the tubes, the 6U5 model in particular, have become rare and remarkably hard to come by of late. When the supply dried ...

Technically called "autostereograms," Magic Eye pictures became popular in 1959, when psychologist Bela Julesz invented them. His goal? To examine how people can see in 3D. He used a pretty basic ...