Analog robot
An analog robot is a type of robot which uses analog circuitry to go toward a simple goal such as finding more light or responding to sound. The first real analog robot was invented in the 1940s by William Grey Walter. The name of these robots were ELSIE and ELMER (Electro Mechanical Robot). The original circuitry was developed using two vacuum tubes and a photocell to search and follow a light. Recently a kind of analog robots was developed by Mark Tilden.
Computer art
One of the first robot painters was AARON, an artificial intelligence/artist developed by Professor Harold Cohen, UCSD, in the mid-1970s. Another pioneer in the field, Ken Goldberg of UC Berkeley created an 11' x 11' painting machine in 1992. Multiple other robotic painters exist though none are currently mass-produced.