Making an variable strength magnet
September 28, 2009
I am in need of magnets where the strength of the magnet can be varied. Specifically I need 3 "settings", off, low and high. Low would be where the magnets have enough strength to connect but not more strength than they can be pulled apart. High would be where they connect but can't be pulled apart.
Now I'm wondering if such a magnet even exists, or if I have to make it somehow myself. If I have to make it myself, what would be the best solution? All I can think of, is making an electromagnet. However the magnets I need must be really small, no more than a centimeter in diameter, so I'm not sure it's possible to make an electromagnet out of that. Furthermore I have been thinking of using neodymium magnets, as they don't lose their strength but they are also very hard to pull apart from what I've heard, so they may not be the best idea.