Instructables

Magnetic Field

video Magnetic Field
This very simple electric motor is called a homopolar motor because the magnetic field does not change direction or strength. With only three parts, it is probably the simplest motor you can possibly make.
angryrobot178 months ago
Can you use any size magnet and any sized battery?
timmy1234s5 years ago
Im speechless(in a good way) By the way, where would you get the stiff copper wire and sculpt it?
Like FireCrazyAlchemist said, you could use a wire hanger, just scrape off the coating and make sure you have continuity
You can Sometimes Find it in Transformers,One is Long,And One is short,and Stiff. You could also Try CAT5,It has copper wire.
pradipta032 years ago
Cool indeed.
fpermata3 years ago
it was cool, awesome, marvelous, i want to try it
powerfool4 years ago
Hi, it's really nice! But can you give us any tips on how to bend the wire like the shapes you have made, without getting very frustated?
You can use needle nose pliers. Sometimes called, Jewelry pliers. They can make small, sharp curls and designs.
arriero4x44 years ago
 great Idea., I doit it with my kids :)
karimm7954 years ago
can i use a paper clip ?
alvin98614 years ago
I found that if you put small dent in top of battery, it keeps the wire in place so doesn't fall off. Use a small nail or something with a with a point. Don't hit to hard or it will punch a hole in battery.
pyroal5 years ago
Where did you get the idea to make this. Its pretty cool. Do you have any other magnet tricks.
can you use a hanger
Yes just make sure you scrape off all the coating on it
dfred935 years ago
with thease do you have to change the battery much...im trying to make one with cds and batteries that spins with magnetic power
knight life5 years ago
Please tell me How to see the video , I can not open it , it is just gray .
so as long as the wire touches both ends it works?
Mr.NHRA5 years ago
Does it drain the batt or just utilize the electrical feild?
ItsTheHobbs5 years ago
Nice thats a really neat one.
von rad5 years ago
Nicely done!
dimmu13135 years ago
In case anyone is interested, the reason this works is because, first, the permanent magnet is made of electrically conductive material. If you notice, the bottom of the copper "rotor" is touching the magnet, which is also the negative electrical terminal. Since current is flowing through the wire a magnetic field is setup around the wire. This new magnetic field, due to its overall shape (based on the shape of the wire) allows for an attraction and/or opposition force (in the case of the "rectangular" rotor, it is both forces, which is why it has the highest acceleration) to move the wire.
kemog5 years ago
THANK YOU man !!!
Migacz5 years ago
I tried this, it did not work. Does the wire need to be de- insulated or do I need a better magnet? The magnet is round so I don't know why it isn't working.
AznPanda5 years ago
Kool last one could become a fan! =D a mini fan
leebryuk6 years ago
That was a fun presentation. Simple and to the point. No muttering explanations either. The minimalism was appropriate. Good job!
Arbitror6 years ago
Totally AWESOME!
shortydog6 years ago
Awsome. It's so simple too.
adamvs6 years ago
Brilliant! I also like the elegance of the presentation. It looked like it was a short from Discovery channel. Very cool
awkrin6 years ago
10/10 really cool thing
pyro 3606 years ago
NICE! ill mod it to make a car! thanks!
thats pretty cool
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