How to Make a Picture with Creepy Eyes That Follow You Around

Do you feel like you're being watched? Unless you're visiting the home of Instructables member jgbradley1, then you probably are.

It's a classic horror trope in movies and television: as you move through a spooky room, the eyes of a picture seem to follow you around. jgbradley1 made that real with a Kinect sensor input and a poster of the cover of Batman: Legends of the Dark Knight #50. He painted wood balls to serve as eyeballs and placed them on rotary servo motors. You can find his circuit diagram and code here.

(Video Link)

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I think that is the opposite Janson was suggesting. If you using ping pong balls or something else that is a consistent bright white, and have them bulge inward, then you don't need any moving parts or electronics. It is an optical illusion and our minds are used to seeing the eyes as being ball shaped, not dimple shaped, and will see the dot as moving when really you are just obscuring some of the white on one side or the other depending on your angle.
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