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.
Hanson Robotics
The robot debuted at the Asia-Pacific Economic Cooperation (APEC) Summit in November 2005. It was the first android head in history to be mounted on a life-size walking frame. Albert Einstein HUBO can perform realistic facial expressions and mimic Albert Einstein's voice via a voice synthesizer. The robot is currently at the University of California, San Diego at the California Institute for Telecommunications and Information Technology (Calit2) where scientists study the capability of robots to learn emotional intelligence.