What to do with 20 magnets?

[The Thing]

As the title says: What can I do with 20 strong 1/2" disc magnets? I'm thinking of building something, but what? (except a Gauss Rifle). The project can use the magnets, and electronic parts and a 9V battery. It's for a school project.

Thanks.

[DV8 2XL]

Make a homopolar, or disk dynamo. This is an electrical generator consisting of a conducting disk rotating in a magnetic field with one electrical contact on the axis and the other on the edge of the disk. attach it across a DC source and it will become a homopolar motor.

 

Not only is this neat in it self, but there is a lot of non-intuitive electro magnetic stuff hapening here.

[The Thing]

Thanks. However, are my magnets too small? They're half an inch in diameter.

How about a reed switch motor? Maybe I'll build one of those and control its speed with another magnet. It's extremely simple to build. Now, I'll just have to find a reed switch and I don't think Radio Shack has one...

[DV8 2XL]

They should, they use to stock them. If not try Addison's

[The Thing]

The thing is, I'm not in the States. I'm in Canada, and the Radio Shack is The Source by Circuit City here. I'm pretty sure they don't have reed switches, but I'll try to get one.

Any other ideas?

[DV8 2XL]

Look at my address, I'm Canadian too

 

http://www.addison-electronique.com/home.htm

 

Canadian company, Canadian dollars

[The Thing]

Err... I'm on the other side of the country . Vancouver.

[DV8 2XL]

That's what UPS is for.

[YT2095]

a scaled-down version of this: http://www.windstuffnow.com/main/microwave_wind_generator.htm

would be great!