The Armatron: From 90-Degree Rotation to 360-Degree Freedom

Hiroyuki Watanabe, the inventor of the Armatron robotic arm, initially drew inspiration from a newspaper clipping depicting a mechanical arm. However, the first prototype could only rotate 90 degrees and had a complex control panel. Watanabe's hobby of flying radio-controlled helicopters provided the breakthrough; he designed a system allowing 360-degree rotation and simpler controls, resulting in a toy classic.