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- Magnet Square - 0.125"
images are CC BY-NC-SA 3.0
Description: These are very small rare earth magnets - 0.125" cubed. Composed of Neodymium/Iron/Boron (NdFeB), these magnets are curiously strong and make for a great way to attach tools to a metal workbench, hold small children to a fridge, and as a trigger for reed switches. Don’t let the photo fool you - these are very small magnets.
Activates the reed switch (shown below) at a distance of about 1cm.
Sold in single units.
Don’t forget to emblazon these with “do not swallow” stickers…
http://www.ibtimes.com/buckyballs-recall-2014-sale-buckyballs-buckycubes-toys-banned-recalled-risk-injury-after-1583725
I suppose you might be “safe” as long as you don’t market them as toys. (I never did get a couple cubes of the buckyballs or cubes before they were recalled…) :‘(
Wait, so how big are these, really? Next to the quarter, they do indeed look to be about 0.125", but according to the ruler picture, it’s over 0.25" to a side…
Scales must be wrong. They are 0.125" cube.
I just noticed that myself. The scale is wrong for some reason.
Would this magnet paired with a Hall Effect Sensor or a Insulated Reed Switch be able to work mounted to the front wheel and fork on my MC?
(I’m looking into building a wireless speedsensor).
The distance from fork to wheel is some inches. (10 cm or so)
I’m using these to trigger a Hall effect sensor. A bit more sensor sensitivity is nice on these since they pack less punch than a bulkier magnet, but they’re still plenty strong if you have good sensitivity and a reasonable sensing distance.
Could you share numbers? It would be great to know what cm distance (even roughly) it takes for this magnet to trigger a Hall Effect sensor (itself rated to switch at 0.5-9.5mT or 5-95gauss).
I tested this magnet with a Hall effect sensor rated at 85G (see the test, this magnet at 1:20), and it switched at about 0.5cm.
Could i use these to trigger a Hall Effect Sensor?