Simple ways of extracting very powerful ceramic and rare earth magnets from scrap materials are shown. A simple way of identifying the North and South faces of the magnets is also demonstrated.
About the removal of neodymium magnets. They are very brittle so wacking is not a good idea, espeacially with the thinner ones. What you do is get a pair of good pliers, a pair of strong hands, and then bend the plate that the magnets are atached to. They will be easy to remove, although some of the nice coating might peel off.
You might want to consider leaving the magnets in the metal, for speakers, or stuck on the metal when dealing with hard drives. With the speaker magnets, the metal acts as a shield in one direction, which can be useful for some applications and experiments, and the metal plates the hard drive magnets are stuck to can be used for mounting the magnets on non-magnetic material.
Old analog meters for measuring currents or volts work by an electromagnet pushing at a permanent magnet, but I suspect the magnet may be rather small. Magnetrons, some of the old antennas, the colorful part around the brass ring, may contain beryllium. If that part breaks and the dust is inhaled it may cause beryliosis, a rather nasty lung condition that makes for a painful way to die
This video gave me the answer to a question that I always place: how do I divide a magnet from a useless piece of metal? thanks for giving me the answer
Peter Pain Hi Peter - do look at www.scienceteachingalive.com for links to all videos and freedownloads of resources and documents useful in science teaching - Kate Gray
It was very difficult to remove the neodyme magnets because they're glued down. One of them has so much glue on it it is impossible to remove. I actually ended up breaking the magnet before I had gotten it off.
next time try bending the plate it is on with a pair of pliers, then once it is bent slide a knife between the plate and the magnet, it should come right off
Can you explain sir why that shiny part on metal housing from speaker magnet is so strong? It looks like gall coated metal but what is that in the center is it aluminum coated? Its nearly strong the center as bouth poles together. And the strange thing is bouth poles from other magnet are atracted to it
I’m not sure how the magnet works between the North Pole & South Pole what’s I understand if the magnet pulled in together is the south pole if it pushed out is the North Pole maybe I got it wrong
Hi Baddy thank you for your information I can't fund ur email address also I aerdy subscribed you I have a question for you it's possible to make electricity by magnetic could you help about that thanks again and also replying me by email please 😊
You must be careful when opening a Microwave oven control cabinet. The large capacitor in this area retains its charge ,3000V for some time , This can kill you by electrocution .
