Windmill

Windmill is a component of Electric Box. When its blades catch air, its base produces electricity.

Look
Windmill looks like dark gray box with a lightning symbol on it. There is also a gray rod going upwars out of the box with three red blades attached to it. When powered, the blades rotate, and the lightning symbol turns yellow.

Features
It occupies two vertically adjacent cells, one for the base and one for the blades. The blades are capable of catching air from a Fan, and when that happens, the base starts producing electricity.

Trivia

 * In Electric Box 2 it is replaced with Power Generator.