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.
Robotic art
Advances in engineering created new possibilities for robotic art. In 1893, Prof. George Moore created "The Steam Man", a humanoid mechanism powered by a boiler, which he exhibited in New York City. Supported by a horizontal bar attached to a vertical post, it was capable of walking in a circle at a speed of four or five miles an hour; reportedly, it could not be held back by two men. In 1898, the physicist and engineer Nikola Tesla demonstrated a remote-controlled boat in Madison Square Garden, making use of a specially built indoor pond. This device has been identified as the world's first radio-controlled vessel. Tesla described it as having "a borrowed mind", and envisioned a fleet of fifty or a hundred submarines, or any other kind of vehicle, under the command of one or several operators.