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.
History of robots
Mechanical automata were constructed in the 10th century BC in the Western Zhou Dynasty. The artisan Yan Shi made humanoid automata that could sing and dance. The machine is said to have possessed lifelike organs, like bones, muscles and joints. The Cosmic Engine, a clock tower built by Su Song in Kaifeng, China, in 1088, featured mechanical mannequins that chimed the hours, ringing gongs or bells among other devices. Fetes of automation continued into the Tang Dynasty. Daifeng Ma built a automated dresser servant for the queen. Ying Wenliang built a automata man that proposed toasts at banquets and a wooden woman automata that played the sheng. Among the best documented automata of ancient China are that of Han Zhile, a Japanese who moved to China in the early 9th century BC.