This document discusses EEG (electroencephalography) and how it can be used to control a robot with brainwaves. It describes EEG as a method to record electrical activity in the brain and how it is commonly used in medicine. It then explains that an EEG brainwave sensor analyzes brain signals, transmits them to another device, defines rules based on brainwave analytics, and uses this to control a robot. Different types of brainwaves (beta, alpha, theta, delta) are produced during different mental states and levels of brain activity.