The goal was not to make a real generator, producing energy. But to demonstrate the major components of
wind generation in addition to power generation, which was the goal of the science project of my daughter.
Hope you enjoy.
Step 1: Materials
Cardboard pieces (0.4 cm thick);
pieces of balsa wood
the cardboard cylinders;
two sheets of A4 paper;
a magnet rare earth (taken from an old CD player's);
mold parts (made in CorelDraw but put the photo in full size);
glue, scissors, cutter, paint, etc ...
one battery (9 Volts)
tree reedswitch (normally open);
one on / off switch;
one red LED;
one resistor of 500 ohms;
a copper plate pierced;
four terminals for connecting wires
wire, welding, etc ...
Step 2: Cutting and assembling the pieces
After that, assemble and paste.
After loading axis (stick), glue the magnet, as shown in figure.
Step 3: Spinner and propellers.
After this, I used a dremmel with the aid of sandpaper to reach the final result.
Each propeller was made with a piece of balsa wood and a piece of a stick. After cutting, I used sandpaper to get the look of an airplane wing, as shown in figure.
A did a jig in a sheet showing the position of each propeller (120 ° from each other)
After that, it was enough to mark, drill and mount the propellers in spinner.
Step 4: Mounting the tower
To not swing the tower, put a 5 marbles between pieces of cardboard to the balls will not become loose.
After that, I made a hole to pass the wire from the reed switch inside the tower. For this, I used a string as shown in figure.