aThe motor is simply a battery, a magnet, and a small coil of wire you make yourself. There is a secret to making it (which I will of course share with you) which is at the same time clever and delightfully simple. 马达简单地是电池、磁铁和您做自己导线的小卷。 有秘密到做它 (当然哪...
With the motor spinning, hold up the other magnet, above the armature. As you move it closer, what happens? Turn the magnet over and try again to see what happens. What Happened: The armature is a temporary magnet, getting its force from the electrical current in the battery. The neodymi...
New simple electric motor ideas! Easy to build do it yourself motors with detailed instructions. Based on grand prize winning science project. 17 unique motor kits for all ages.
Here's another neat demonstration of magnets set in motion with a simple AA battery. It's a great science demo that attracts attention whether in the classroom or at home. It works on the same principles described in our earlierMagnet CarandHomopolar Motorarticles. ...
WUNSCH,ERICHWUNSCH,FRIEDGARDDE2405305A1 * Feb 5, 1974 Aug 7, 1975 Erich Wunsch Small electric tool for car - with simple friction clutch between battery driven motor and tool head
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The reed switch motor has a unique advantage. It is very easy to control and change its speed with a few additional parts. If you take an extra magnet and bring it closer to the reed switch, its magnetic field will change the gap between the reed switch contacts. A smaller gap allows ...
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The nine-volt battery works, but it runs the motor too fast, making a lot of noise, and risking breakage of the glass tube. It does, however, make a slightly higher voltage, until the device breaks. Click on the image for a larger picture ...
homopolar-motor0zoom.jpg Credit: Dave Ansell PlayDownload Ingredients An AA battery A strong rare earth magnet A piece of solid copper wire A small nut A second magnet or some glue Instructions Stick the magnet onto the bottom (negative end) of the battery, and stand the battery on top of...