Make: Online : 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.

Comments

Oldest comments listed first.

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

That's very cool. Thanks!!

Reply to this comment

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

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

Reply to this comment

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/

Reply to this comment

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.

Reply to this comment

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.

Reply to this comment

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/

Reply to this comment

Posted by: Anonymous 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

Reply to this comment

Subscribe to MAKE Magazine!

Subscribe today, save 42% and get web access to MAKE free. MAKE Digital Edition is available only to subscribers.

$34.95 / 1 year
(4 Quarterly Issues)

Subscribe now

Void your warranty, violate a user agreement, fry a circuit, blow a fuse, poke an eye out. Make: The risk-takers, the doers, the makers of things... Welcome to Make: Online!

More guides: Santa Claus Machines, Geek Toys for Grown Up Girls & Boys

Check out all of the episodes of Make: television

Connect with MAKE

	MAKE on Facebook Visit our Facebook page and become a fan of MAKE!
	MAKE on Twitter Follow our MAKE tweets!
	MAKE on Flickr Join our MAKE Flickr Pool!

make_tips on Twitter

Why advertise on MAKE?
Read what folks are saying about us!

Click here to advertise on MAKE!

Make: Online authors!

Gareth Branwyn
Senior Editor

Phillip Torrone
Senior Editor
| AIM | Twitter

Becky Stern
Associate Editor
| AIM | Twitter

Marc de Vinck
Contributing Writer
| AIM | Twitter

John Park
Contributing Writer
| Twitter

Sean Ragan
Contributing Writer
| Twitter

Matt Mets
Contributing Writer
| AIM | Twitter

Dale Dougherty
Editor & Publisher
| Twitter

Shawn Connally
Managing Editor
| Twitter

Goli Mohammadi
Associate Managing Editor

Kip Kay Kip Kay
Weekend Projects
| AIM | Twitter

Collin Cunningham
Contributing Writer
| AIM | Twitter

Adam Flaherty
Contributing Writer
| AIM | Twitter

More contributors: Mark Frauenfelder (Editor-in-Chief, MAKE magazine), Kipp Bradford (Technical Consultant/Writer), Chris Connors (Education), Diana Eng (Guest Author), Peter Horvath (Intern), Brian Jepson (O'Reilly Media), Robert Bruce Thompson (Science Room)

Suggest a Site!

Current Podcast

Weekend Project: Beetlebot Simple robot from your parts bin that avoids obstacles. Thanks go to Jerome Demers for the original article in MAKE, Volume 12. To download the Beetlebot video, click here or subscribe in iTunes. Check out the complete Beetlebot article... More...