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The Levitron top device is a design that served as a base for the manufacture of a series of commercial toys under this brand that employ the phenomenon known as spin-stabilized magnetic levitation. This design, with moving permanent magnets, is quite distinct from other versions which use changing electromagnetic fields, levitating various ...
A magnetic switchable device (often called a magnetic base) is a magnetic fixture that uses one or more permanent magnets in a configuration that allows the external field to be turned on or off. They are used in many applications including optics , metalworking , lifting , and robotics, to attach items to metal surfaces in a secure but ...
The linear induction, Faraday flashlight, or "shake flashlight" is another type of mechanically powered flashlight. It has been sold in the US beginning with direct marketing campaigns in 2002. This design contains a linear electrical generator which charges a supercapacitor which functions similarly to a rechargeable battery when the ...
A set of modern LED flashlights. A flashlight or electric torch (Commonwealth English), usually shortened to torch, is a portable hand-held electric lamp.Formerly, the light source typically was a miniature incandescent light bulb, but these have been displaced by light-emitting diodes (LEDs) since the early 2000s.
Image of flexible printed circuits prior to de-panelization. An Olympus Stylus camera without the case, showing the flex circuit assembly. Flexible electronics, also known as flex circuits, is a technology for assembling electronic circuits by mounting electronic components on flexible plastic substrates, such as polyimide, PEEK or transparent conductive polyester [1] film.
Flexible substrates typically have thinner metalization. Metal-core boards for high power devices commonly use thicker copper; 35 μm is usual but also 140 and 400 μm can be encountered. In the US, copper foil thickness is specified in units of ounces per square foot (oz/ft 2 ), commonly referred to simply as ounce .