[crazy][ot][spam][personal] magnet golem
random small project: make a walking golem that has its body parts levitate separately using electromagnets. I started this somewhere, dunno where the work is, maybe I can figure it out again. the basic prototype is a small array of electromagnets that can move a permanent magnet around them as programmed
after posting this I was able to regain control of much of my body and stand up! want to debug flasher more
for completion of project description: I think the separate parts power each other via inductance, but you start with wires to reduce the challenge space.
this is the second attempt at this pointless hobby project. it seems rather harder than the first. I found it possible that most calculation ease could likely be found by modeling magnets as volumes of point magnet charges. the force between two charges is mu * q1 * q2 / (4 pi r^2). I recall it seemed to make the most sense to start with very tiny magnets, but to confirm that it would seem to be good to form a relation between the gravitational force on a magnet and the magnetic force. will a neodymium magnet accelerate more rapidly in a magnetic field if it is small, or large? why? last time this seemed obvious, which is slightly worrying.
maxwell's equations (which I never learned, still interested) are expanded for magnetic charges at https://en.wikipedia.org/wiki/Magnetic_monopole#Maxwell's_equations . i've noticed sometimes wikipedia's citations can give more information than the article, if helpful. it seems like those equations could possibly be used to plot a volume of magnetic charge as a function of field shape and strength. regarding mass of a magnet, it seems like the force it experiences on it is going to be proportional to its field strength. so you might want magnets where field strength / mass is greatest, and at the greatest distance from the magnet. unsure.
i'm going to guess that you could model a magnet as being made of units of magnetic-strength-with-mass and an electromagnet as being made of units of magnetic-strength-with-current and you'd basically want the smallest volume of the highest grade magnet, shape and distance unaddressed, to accelerate it with a given electromagnet. each magnet particle needing some number of electromagnet units to lift it. electromagnetic seem to be sold based on a raw force, such as "holding force" . unsure what this force represents. alternatively one could wrap cores with wire by hand.
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