New digital potentiometers. Free Technical Library News

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New digital potentiometers

24.06.2005

INTERSIL announces the launch of the new ISL90460, ISL90461 and ISL90462 digital potentiometer family, the world's smallest 32-pin potentiometers.

They are designed to adjust contrast and brightness in mobile phones, personal digital assistants and GPS receivers. The resistance range of the new potentiometers is from 10 kΩ (available in a 5-pin SC-70 package) to 100 kΩ (available in a 6-pin SOT-23 package).

The supply voltage of the new potentiometers is from 2,7 to 5,5 V. Microcircuits are produced using lead-free technology.

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colored language 24.09.2017

The human eye can distinguish a huge number of colors, which cannot be said about human language. In some languages there are only three "color" words: black, white and red, in others the number of color categories may exceed a dozen, but still there are fewer of them than real colors.

Researchers at the Massachusetts Institute of Technology have found a peculiar pattern in the distribution of language categories for different color hues: it turns out that warm colors, like yellow, orange, and red, are denoted in a wide variety of languages by more words than cool colors, like blue and green.

The scientists compared how people who speak English, Spanish and the language of the South American Indians Chimane describe colors. The Chimane language has fewer "color" words than Spanish and English, so when they were shown a color test with 80 different colors, the Indians had difficulty with some shades. Of course, there was no disagreement about black, white and red, but when it came to yellow, green or blue, different people described them differently - in other words, there was no single way in the Chimane language to talk about these colors.

However, when the researchers compared the Chimane results with those obtained with English and Spanish speakers, it turned out that, as mentioned above, both of them best describe warm shades. Although the Chimane had more difficulty describing the color yellow than North Americans or Spanish-speaking Bolivians, for all of them, yellow caused less problems than green and blue.

Then the researchers used a large-scale language database that stored the results of color tests with native speakers of 110 languages of the world - and everywhere the pattern was the same: for warm colors, more accurate words were everywhere. This, in turn, means that you can find more different words for warm colors in any language of the world than for cold ones.

Such a general linguistic bias in favor of warm shades is manifested in photographs. Scientists analyzed 20 photos and came to the conclusion that the background is most often occupied by "cold" pixels, while what is in the foreground is shot in warmer colors. The foreground is usually what grabs our attention, what we want to show and what we want to talk about, and a warm color is one way to distinguish one object from another.

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