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  2. Joule thief - Wikipedia

    en.wikipedia.org/wiki/Joule_thief

    The joule thief is not a new concept. Basically, it adds a LED to the output of a self-oscillating voltage booster, which was patented many decades ago.. US Patent 1949383, [1] filed in 1930, "Electronic device", describes a vacuum tube based oscillator circuit to convert a low voltage into a high voltage.

  3. Samsung Galaxy Buds series - Wikipedia

    en.wikipedia.org/wiki/Samsung_Galaxy_Buds_series

    Galaxy Buds 2 Pro; Earbuds size 21.6 x 19.9 x 18.7 mm Earbuds weight 5.5g Case size 50.2 x 50.4 x 27.7 mm Case weight 43.3g Bluetooth version Bluetooth 5.3 Sensors Accelerometer, Gyro sensor, Hall sensor, Proximity sensor, Touch sensor, Voice Pickup Unit Battery Earbuds: 58 mAh Case: 500 mAh Charging USB-C and Qi wireless charging

  4. Arc diagram - Wikipedia

    en.wikipedia.org/wiki/Arc_diagram

    An arc diagram is a style of graph drawing, in which the vertices of a graph are placed along a line in the Euclidean plane, with edges being drawn as semicircles in one or both of the two halfplanes bounded by the line, or as smooth curves formed by sequences of semicircles. In some cases, line segments of the line itself are also allowed as ...

  5. Line in the sand - Wikipedia

    en.wikipedia.org/wiki/Line_in_the_sand

    Some have (perhaps erroneously) interpreted Jesus' writing in the sand, as drawing a line in the sand in order to address those who are about to stone a woman caught in adultery. However, the literal translation is not that he drew a line in the sand, but that he "wrote" (or "drew lines" in some translations) in the sand, an important distinction.

  6. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    1. Center line, the central axis of a feature. 2. Class, for example, "paint per spec XYZ revision C type 1 class 2" may be abbreviated as "paint per spec XYZ REV C TY 1 CL 2" or even in some cases "paint per spec XYZ-C-1-2". (The latter practice is not uncommon but is cryptic for workers with minimal training and experience. The first two ...

  7. Circuit diagram - Wikipedia

    en.wikipedia.org/wiki/Circuit_diagram

    A circuit diagram (or: wiring diagram, electrical diagram, elementary diagram, electronic schematic) is a graphical representation of an electrical circuit. A pictorial circuit diagram uses simple images of components, while a schematic diagram shows the components and interconnections of the circuit using standardized symbolic representations.

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  9. United States Secret Service - Wikipedia

    en.wikipedia.org/wiki/United_States_Secret_Service

    The United States Secret Service (USSS or Secret Service) is a federal law enforcement agency under the Department of Homeland Security with the purpose of conducting investigations into currency and financial-payment crime, and protecting U.S. political leaders, their families, and visiting heads of state or government. [3]