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<div>All the sound guys have a problem. At the end of the gig, there is a box full of partially used batteries from all the wireless gadgets. Here is a fine use for them. </div><div><br></div><div>Dale</div><div><br></div><div><br></div><div><br></div><div id="composer_signature"><div style="font-size:88%;color:#364f67" dir="auto">Sent from my Verizon 4G LTE smartphone</div></div><br><br>-------- Original message --------<br>From: Michael Leuchtenburg <michael@slashhome.org> <br>Date: 12/28/16 09:28 (GMT-05:00) <br>To: Techno-Fandom <tf@techno-fandom.org> <br>Subject: Re: [tf@techno-fandom.org] 1000A: don't try this at home <br><br>On Wed, Dec 28, 2016 at 9:12 AM, John Maizels <jmaizels@optusnet.com.au> wrote:<br>> * the world's simplest electric train, using circuits that aren't even<br>> complete. Seriously, this reminds me of the Dean Drive, and I'd dismiss it<br>> completely except for this rather compelling video which appears to have no<br>> Penn and Teller: https://www.youtube.com/watch?v=J9b0J29OzAU<br><br>Ah, but they are complete! Many separate versions of the<br>magnet-battery-magnet-coil system are formed as it moves through the<br>long coil. In each case, current flows through the magnets, through<br>the coil, and back to the other end of the battery. Here's a motor<br>using the same design principle:<br>https://www.youtube.com/watch?v=94RpbYopUdI<br><br>Note that no change of polarity is required. That's because it's a<br>homopolar motor. Unlike commutated motors, the axis of rotation is<br>parallel to the magnetic field.<br><br>- Lucky<br></body></html>