Generating electric power for a robotic end effector

A power generator configured to be disposed in an elbow of a robot device, wherein the power generator comprises:

• permanent magnets configured to attach to a first link of the robot device, wherein one or more of the first link or a second link of the robot device are to rotate about an axis of the elbow;
• a printed circuit board (PCB) configured to couple to wires of an end effector disposed at a distal end of the second link;
• and
• a coils array disposed proximate the PCB and the permanent magnets, wherein the power generator is configured to generate electrical power based on relative angular mechanical movement associated with the elbow, and wherein the end effector is to receive the electrical power via the wires.