Questions tagged [magnets]
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Could barrel overheating be solved with magnets?
I was wondering whether overheating of guns could be solved by magnets?
Coming from a country where firearms are pretty much only available for the police, military and criminals, I don't really have ...
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How to restore the magnetism on a fridge door joint
Current refrigerator's doors are close with a magnetic seal which is attracted to the doorframe. This magnetism seem to weaken with time. I have a fridge which lost most of it, so that is doesn't even ...
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Can this new AC motor/generator design work?
I'm currently in the works of developing a vertically suspended flywheel, and I'm trying to figure out the best method to convert rotational energy to electrical energy and vice versa. I don't want to ...
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What are the benefits of using a spring as a drive screw in this electronic deadbolt?
The Schlage FBE365 electronic deadbolt uses a DC motor attached to a helical screw to raise and lower the C-shaped piece shown. The way the rest of the mechanism works is not important for this ...
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New Method for a Passive Magnetic Bearing
Is it possible to create a passive magnetic bearing by layering the outside of a shaft with a magnetic film and placing a magnetic ring on the outside. The outer layer of the film would have a north ...
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What materials are most transparent to magnetic fields?
What common materials are most transparent to magnetic fields? I have two applications; in each case I want minimal distortion and degradation of the magnetic field:
Wrapping/surrounding a magnet (...
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How do I design this magnetic bed?
I am looking to design a bed of magnets that I can lay on for health improvement. Ignoring any health concerns, the objective is to create the "purest" AND strongest negative field (NORTH ...
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How to calculate force / torque between permanent magnets
Given two permanent magnets (for instance, made with ferrite or neodymium with shape of: cylinder, disc, toroid, etc), how can I calculate the force / torque between those magnets? Are there any ...
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Any information on magnetic braking with copper?
I have an engineering project where I have to design and build a model of a drop tower from a theme park. The tower itself can be no taller than 40cm.
I plan to use magnetic braking with copper to ...
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What do you call the curved strip magnets in Hall Effect twist throttles?
Many twist throttles (for e-bikes, etc.) have long thin curved magnets read by a Hall Effect sensor. I want to buy some but I don't know what they're called.
To clarify, this magnet is read by a ...
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Magnetic Locks On Metal Gate
I have a problem with the noise from a magnetic lock on a metal gate. It's a long story, but is it possible to put something between the connectors and have it still work?
Essentially, when the magnet ...
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How much force in LBs could a 10in long 3in wide 0.5in thick piece of neodymium magnet repel off a 0.5in thick sheet of neodymium magnet
I know nothing about magnets and have an idea that I don’t know is possible to carry out. I want to replace the soles of a pair of shoes with one whole custom neodymium magnet on each shoe. What size ...
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How to make the magnetic field intensity from a DC electromagnet bigger without changing its current, number of turns, or geometry?
I'm currently doing a project on magnetic haptic feedback using DC electromagnet. The principle of my haptic feedback system is very simple (figure shown below):
A permanent magnet is stuck to the ...
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How to concentrate magnetic fields using the least amount of material possible for a fixed area
So the goal is to a build a device that will redirect field lines from earths magnetic field at the magnetic north pole into a point.
The goal is to maximize the area / amount of magnetic flux ...
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Which is the better magnetic arrangement for a voice coil to give a larger amplitude of movement all else being equal?
Given everything else equal (e.g. same overall amount of magnetic material, same strength magnetic material, same coil, same power supplied, etc. etc.) which of these two magnetic configurations of a ...
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