Mythbuster’s Grant Imahara built a mascot for Craig Ferguson of CBS’s Late Late Show. PopMech’s Erin McCarthy describes it:
Imahara started by replacing the torso of a plastic skeleton with a metal plate that holds two servomotors, two batteries and the control boards. The plan called for the robot’s right arm to lift and point, something a skeleton arm made of plastic just couldn’t do. “Not unlike Steve Austin, the Bionic Man, Geoff’s got a bionic arm,” Imahara says. “The plastic has been split in half and there’s an aluminum piece in the middle.” The metal arm, which has 90 degrees of movement, connects to a shoulder mechanism that is controlled by one of the servomotors.
More information and sketches on the Popular Mechanics blog .