Instructables

How to make a simple, small and strong electromagnet

Hi everyone, i am going to tell u how to make a small, simple and strong electromagnet. Sorry about the bad quality pics and videos and i could not upload many pics step by step, but i will try to explain as much as i can. U can see the videos in the last step.
 
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Step 1: The items you will need

The items you will need are:-
1. 20 gauge enamel coated copper wire also known as magnet wire. ( I bought around 20 meters)
2. a spool like the one i use or something similar.
3. electrical tape.
4. 6v battery (better if using 800-850 ma) i used a 1.5A.
5. A ac to dc converter.
6. aligator clips.
7. a neodymium magnet.

And a lot of time.

Step 2: Step 3

This is the most toughest, boring and time taking step of all. All u need to do is take the 20 gauge copper wire and coil it around the spool until u get 6-7 layers. You have to coil them close and tight, and have to put some electrical tape after each layer.

Step 3: Step 4

Now once u have finished coiling the wire u can heat the tip of the wire until it gets red hot or red and then take a wet steel wool and scrap of the enamel coating off the wire. then u should be able to see bright copper.
amruth (author) 2 years ago
I forgot to tell this , u can increase ur electromagnets strength by adding a iron core and i recommend a soft iron core because soft iron gets magnetised when there is electricity and gets demagnetised when there is no current, but the other irons get magnetised and maintain that property. A few examples are objects made out of steel get magnetised and dont get demagnetised.
jpoopdog amruth2 years ago
even better, just use a weak solid ferrite magnet for the core, which you would increase its magnetism with using the coil. if your core magnet is too strong, heat it up a little bit so its hot to touch, and it will gradually loose its magnetism. stop heating and cooling once its weak enough. but overheat and it looses it completely.