This exhibit is one of the most popular. The generator has 5 separate windings, each connected to 2 LED´s on a screen. By swinging the pendulum, rotor, the generator generates  sine current which is indicated on the screen with the LED's. 

Option: Other equipmend can be connected.

Maintenance: No
Material: Metal, MDF.
Colour: Gaphite, silver.
Measures: see figure.