A hedgehog transformer is an early type of electrical transformer designed to work at audio frequencies (AF). They resemble hedgehogs in size, color and shape, and were used in the first part of the 20th Century. (See http://www.telephonecollecting.org/hedgehog.html)
Read more about this topic: Hedgehogs In Culture
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Famous quotes containing the word technology:
“Our technology forces us to live mythically, but we continue to think fragmentarily, and on single, separate planes.”
—Marshall McLuhan (19111980)
“Technology is not an image of the world but a way of operating on reality. The nihilism of technology lies not only in the fact that it is the most perfect expression of the will to power ... but also in the fact that it lacks meaning.”
—Octavio Paz (b. 1914)
“One can prove or refute anything at all with words. Soon people will perfect language technology to such an extent that theyll be proving with mathematical precision that twice two is seven.”
—Anton Pavlovich Chekhov (18601904)