Eudaemons

The Eudaemons were a small group headed by graduate physics students J. Doyne Farmer and Norman Packard at the University of California Santa Cruz in the late 1970s.

With a camera and an oscilloscope, they tracked the motion of the roulette wheel and were able to figure out a formula involving trigonometric functions and four variables.

But she kept placing bets, so the observer, who in this case was Farmer, left the table, so that the bettor would be forced to leave as well.

A previous wearable roulette computer had been built and used in a casino by Edward O. Thorp and Claude Shannon in 1960–1961, though it had only been used briefly.

The story of the Eudaemons was featured in 2004 on the History Channel, in episode "Beat the Wheel" of the Breaking Vegas program.