[time-nuts] Ferrofluid Clock Display
brooke at pacific.net
Wed Aug 19 14:30:11 EDT 2015
I know this stuff is used in automotive shock absorbers where the stiffness is varied by an electromagnet.
Here it's used to from a 7-segment display in a clock along with some interesting images.
"Ferrolic does not produce light and is 100% silent since it does not contain mechanically moving elements. Its unique
dynamics are the visual result of the black fluid continiously (sic) finding balance between “gravity”, “magnetic
fields” and its own “van de Waals” forces."
The fluid sells for about $10 per ounce on eBay.
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