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A transducer is a device that converts energy from one form to another. Usually a transducer converts a signal in one form of energy to a signal in another. [1] Transducers are often employed at the boundaries of automation, measurement, and control systems, where electrical signals are converted to and from other physical quantities (energy, force, torque, light, motion, position, etc.).
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The first low-cost junction transistor available to the general public was the CK722, a PNP germanium small signal unit introduced by Raytheon in early 1953 for $7.60 each. In the 1950s and 1960s, hundreds of hobbyist electronics projects based around the CK722 transistor were published in popular books and magazines.
Hàng Trống painting: a genre of Vietnamese woodcut painting that originated from the area of Hàng Trống (vi) and Hàng Nón streets in the Old Quarter of Hanoi, Vietnam. In the past, Hàng Trống painting was an essential element of the Tết Nguyên Đán holiday in Hanoi, but today this tradition almost has disappeared and authentic ...
The formation of the brigade brought together three signal groups that were already in South Vietnam. At the peak of the Vietnam War the brigade consisted of more than 23,000 soldiers, in six Signal groups (including the 160th Signal Group ), 22 signal battalions and several communications agencies, making the 1st Signal Brigade the largest ...
The contents of the Đại Việt sử lược were divided into three volumes (quyển): The first called Quốc sơ diên cách corresponded with the period from the foundation of Văn Lang, the first nation of Vietnam in the 7th century BCE [15] to the 12 Lords Rebellion (10th century); the second and third books were named Nguyễn kỷ ...
Lê Lợi (Vietnamese: [le lə̂ːjˀ], chữ Hán: 黎利; 10 September 1385 – 5 October 1433), also known by his temple name as Lê Thái Tổ (黎太祖) and by his pre-imperial title Bình Định vương (平定王; "Prince of Pacification"), was a Vietnamese rebel leader who founded the Later Lê dynasty and became the first king [a] of the restored kingdom of Đại Việt after the ...
Map of ancient Asia shows location of the Âu Việt state of Nam Cương and other Viet’s kingdoms. According to folklore, prior to Chinese domination of northern and north-central Vietnam, the region was ruled by a series of kingdoms called Văn Lang with a hierarchical government, headed by Lạc Kings ( Hùng Kings ), who were served by ...