It can be fatal for children to ingest 2 or more magnets because of possible pinching of the intestine.ģ.) When playing with multiple neodymium magnets, always use eye protection. Try to avoid handling chipped or worn-out plated magnets.Ģ.) Don't eat magnets, and keep them away from young children who might do so. Magnets are covered by a nickel plating that keeps the neodymium inside. However, there are a couple of things to remember.ġ.) Neodymium is poisonous. Give that combo a spin!īalance is critical for successfully making the combined shapes spin at speed! The shapes may have to be altered slightly to mate with each other. If the legs are too loose around the magnet or coins, the Heart will tend to fly off.įinally, place the flat Heart, inverted, on top of the second legged Heart. If both the legs touch the commutator at once then they are too tight, and the Heart will not rotate. Adjust the legs so they nearly touch the sides of the magnet or pennies. It should spin right away, but sometimes may need a push to get it started. If it doesn't spin, then it is not making contact, or the battery is too weak, or the magnet is not big enough. The Heart should start spinning as soon as it makes contact with the magnet. Then put the first flat Heart shape on to the battery + terminal. Place the fully-charged AA battery on top of the neo magnet. Using The Homopolar Motor With A Neodymium Magnet: It should go around.Īdjust the legs so that there is a loose gap between the legs and the coins. Put the single flat heart onto the + terminal of the battery. Place the fully-charged AA battery on top of the coin stack. Place the stack of coins in the very centre of the back of the speaker, with the speaker face-down on a table or floor.
I used 7 magnetic Canadian pennies as a commutator for best magnetic effect. It uses the same 6 cm distance from + terminal of the battery to the magnet contact point.ġ.) Using The Homopolar Motor With A Bass Speaker: The total height of the second Heart should be about the same as the first Heart ( 8.5 cm). It is tough work requiring strong fingers if 10 gage wire is used! Have a close look at the pictures and use fingers (and a pliers if necessary) to make the bends. The second Heart shape requires a complex bend into two flat-bottomed legs that encircle, but don't touch, the magnet.
The distance from battery + terminal to the magnet contact point should be about 6.0 cm. Also, the total height of the heart must be correct (about 8.5 cm works well) for it to sit on the battery, touch the coins or magnet commutator, and not touch the speaker or table. The idea is to wrap the wire most of the way around the form to give a rounded look.įor the flat heart, the two straight ends become joined by soldering, so they must meet together. Put it in the vice and wrap the wire over it. Make the Heart shape either by using a D-Cell battery, or a piece of pipe, as a form. Here is a YouTube video with the "This Heart's On Fire" song, so that you can try playing it at the same time as the above movie. Note: Unfortunately, mere permission from the band was adequate for Warner Music, and the music of this video has been stripped from it by them.
#HOW TO USE AUDIO HIJACK WITH .AA FILES MOVIE#
The above movie shows a traditional neodymium magnet used as the magnetic field for the Heart motors.īackground music is a non-traditional band called Wolf Parade from Montreal, with "This Heart's On Fire". Song is "Be Excellent To Each Other", courtesy EJ Gold, from the album "California Dreams". Note: No neodymium magnet is needed in this case!
The above movie shows a bass speaker as the source of the magnetic field for the Heart homopolar motor. With a little ingenuity, the two shapes can be combined into one spinning body! The Heart with legs is the next most simple shape. The flat Heart shape is the most basic of homopolar motors. It is a demonstration of the Lorentz Force.įor detailed info, see Wikipedia under " Homopolar Motor" and " Homopolar Generator". Unlike other electric motors, the homopolar design doesn't require changing magnetic fields to work. It consists of a battery, a conductor, and a magnetic field. The homopolar motor is the simplest form of electric motor. This is a great display for Valentines Day.or any day of the year!
#HOW TO USE AUDIO HIJACK WITH .AA FILES HOW TO#
In this Instructable, I show how to make a special 2-piece homopolar motor with a bass speaker, some coins, a battery and two pieces of copper wire.Ī neodymium magnet can be used instead of the bass speaker and coins. Make a pair of rotating copper heart motors.that unite to become one!
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