Tag: magnets
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Product: StackMag
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Using Helmholtz Coils to measure the remanent magnetization of a permanent magnet
While working on my first product for sale, the StackMag, I bought a lot of neodymium magnets. For the first batch, I ordered 50 magnets from Aliexpress. After gluing them all in place, I noticed that they were significantly weaker than expected. They should have been N35 grade which is basically the lowest you can…
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Reinventing a magnetic toy – the Levitron
Levitation is one of these things that everyone thinks is cool. As a kid, I already tried out many times finding the right arrangement of magnets so they would float on top of each other. Finding out that some mathematician already proved this to be impossible hundreds of years ago was quite disappointing (Earnshaw’s theorem).…