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.
Razer (robot)
Razer was designed and built by Ian Lewis and Simon Scott who, after watching the first series of "Robot Wars", agreed that combat robots had potential to be considerably more destructive than the pioneering machines on display. Their choice of weapon was a piercing arm attached to a hydraulic ram and powered by a pump, itself powered by a motorcycle starter motor. This was based on the principle of the brake press, a piece of industrial machinery used to bend metal through progressive force.