MAKE: Blog: HOW TO - Make a homopolar motor

HOW TO - Make a homopolar motor

Homopolarmotor

Here's how to make a homopolar motor extremely simple and TONS of fun - Link.

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Comments

Oldest comments listed first.

Posted by: aolshove on April 20, 2007 at 3:11 PM

That's very cool. Thanks!!

Posted by: gear_head on April 20, 2007 at 7:19 PM

Excellent! My son is going to love this, thanks for posting.

Posted by: +anion on April 20, 2007 at 8:37 PM

here's one that can move around.
http://www.grand-illusions.com/articles/homopolar_roller/

Posted by: Narsil on April 21, 2007 at 7:08 AM

Any idea how long this runs? Minutes? Hours? A day or two?
Also, I believe you can use any magnet in this case, as I have tried it with others and it worked fine. Rare-earth magnets seem to be the "in" thing.

Very cool nonetheless.

Posted by: MrPhelps on April 21, 2007 at 11:09 AM

Considering the battery is practically short-cicuited it won't last very long, maybe a few minutes.

Posted by: Bike on December 14, 2007 at 11:34 AM

What i`ve done is a homopolar motor without neodymium magnet

http://www.metacafe.com/watch/966291/homopolar_motor_without_neodymium_magnet/

Posted by: on May 7, 2008 at 7:51 PM

why it dont work

i try with a AA and a C and i have the copper wire with an IMAN magnets

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