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.
ASEA IRB
The ASEA IRB was constructed by Björn Weichbrodt, Ove Kullborg, Bengt Nilsson and Herbert Kaufmann and was manufactured by ASEA in Sweden/Västerås. The first model, , was developed in 1972–1973 on assignment by the ASEA CEO Curt Nicolin and was shown for the first time at the end of August 1973. The example shown in the Swedish National Museum of Science and Technology is the first robot that was sold. It was bought by Magnussons in Genarp to wax and polish stainless steel tubes bent at . This robot was donated to the museum during ASEA's 100-year anniversary in 1983.