Great video, thanks. This and some of your other videos have helped me understand the magnet choice while designing an unusual hall effect proximity sensor better. Magnetics is new to me - I'm designing by experimenting. In particular this explains why 2 of my 4mm diameter x 4mm magnets stacked together increases the hall sensing distance relative to juts one magnet, but more than 2 does not extend it further.
Does your rule-of-thumb "50 gauss flux-density is needed to pick up a nail" still hold when you use a thicker but shorter magnet? Taking it to an extreme, this rule breaks down in the two-magnet example, because it is about the gradient, rather than the absolute flux-density, when it comes to tasks like picking up nails - right?
INteresting question - I was going to add that into the video but I thought it would make it too long and will make that a future video. What happens depends on the length of the ferrous object (nail or paperclip). The longer it is the more you will see a gradient over the length. The shorter it is the more uniform the field will appear. 50 gauss is pretty much what I see will pick up a small nail or paperclip. If the field was sufficiently large - say from an 8 inch diameter magnet x 2 inches thick then the field in the center at about 10 inches away would be very uniform and probably would not pick a small paper clip up. I will keep all these ideas in mind for that future video and answer the question for sure:)
U could hv tested with clear (air) space between the magnet and hall probe cause the material which u used for the spacing may hv some magnetic shielding property which might cut some flux strength reaching the hall probe.
Were the two magnets that were spaced apart in the end of the video arranged in alike or opposing pole configuration? Or does it not matter for the Gauss reading?
what happens if you stack Halbach arrays instead of cylinders? also, is it possible (in currently understood physics with the elements available in our own solar system) to magnetize something in a way that is permanently repulsive to ferrous metals, as opposed to attractive?
would like to see thick verse diameter and then thick/diameter verse distance graph plots with more sample points. plots show the ideal dimensions or dimensions required for specific situations. if you are going to speak on scientific matters then use the accepted protocol of science, that being metric units. what is with xx.ox millimetre numbers?. decimals of millimetre numbers are clutter, irrelevant to a concept demo.
yes numbers in charts don't show the ideal values. need to take more sample points and graph the points, you will see the efficient point or values for x strength at y distant that you need.
Very useful information about strength of magnet👍
Woooow, so helpful in conceptualizing the dynamics of field strength in relation to size & strength. All about the field concentration/path really.
Great video, thanks. This and some of your other videos have helped me understand the magnet choice while designing an unusual hall effect proximity sensor better. Magnetics is new to me - I'm designing by experimenting. In particular this explains why 2 of my 4mm diameter x 4mm magnets stacked together increases the hall sensing distance relative to juts one magnet, but more than 2 does not extend it further.
Does your rule-of-thumb "50 gauss flux-density is needed to pick up a nail" still hold when you use a thicker but shorter magnet? Taking it to an extreme, this rule breaks down in the two-magnet example, because it is about the gradient, rather than the absolute flux-density, when it comes to tasks like picking up nails - right?
INteresting question - I was going to add that into the video but I thought it would make it too long and will make that a future video. What happens depends on the length of the ferrous object (nail or paperclip). The longer it is the more you will see a gradient over the length. The shorter it is the more uniform the field will appear. 50 gauss is pretty much what I see will pick up a small nail or paperclip. If the field was sufficiently large - say from an 8 inch diameter magnet x 2 inches thick then the field in the center at about 10 inches away would be very uniform and probably would not pick a small paper clip up. I will keep all these ideas in mind for that future video and answer the question for sure:)
Thank you this was exactly the data I needed for my experiment. Much appreciated
Did you get more information about it?
A fast motion video of the reaction would be informative. Thank you.
U could hv tested with clear (air) space between the magnet and hall probe cause the material which u used for the spacing may hv some magnetic shielding property which might cut some flux strength reaching the hall probe.
Were the two magnets that were spaced apart in the end of the video arranged in alike or opposing pole configuration?
Or does it not matter for the Gauss reading?
how to maximize the gauss of ring magnet hole
Nice. You could scan a 3d data point map and visualize it
what happens if you stack Halbach arrays instead of cylinders? also, is it possible (in currently understood physics with the elements available in our own solar system) to magnetize something in a way that is permanently repulsive to ferrous metals, as opposed to attractive?
bismuth.
Wonderful. Exactly the education/demonstration what I was looking for. Thank you very much. Perfect timing.
would like to see thick verse diameter and then thick/diameter verse distance graph plots with more sample points. plots show the ideal dimensions or dimensions required for specific situations. if you are going to speak on scientific matters then use the accepted protocol of science, that being metric units. what is with xx.ox millimetre numbers?. decimals of millimetre numbers are clutter, irrelevant to a concept demo.
So what is the most efficient ratio of thickness to diameter ratio for achieving flux strength at a distance?
yes numbers in charts don't show the ideal values. need to take more sample points and graph the points, you will see the efficient point or values for x strength at y distant that you need.
Hello Sir . ..Can you describe me so how Tokamak fusion reactor work ? Is it magnetic power ? ...Thanks
Have ye documented how nearby mercury liquid affects magnetic forces?
put those magnets inside a copper sleeve...now apply electricity. .n point...