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Making a wide brush. Tips for the home master

Builder, home master

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With a wide brush, the coloring goes faster. What if one is not available? In this case, a spark of two narrow ones will help out.

If the amount of work is small, you can simply wind them side by side with electrical tape. For long-term work, it is better to fasten them together with a thin rail (such as a school ruler), as shown in the figure.

Making a wide brush

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Random news from the Archive

Braille display 07.02.2005

German engineers have created a display for the blind out of metal with shape memory.

In order for, say, a programmer, even who has lost his sight from countless hours spent in front of the monitor, to continue to delight society with the fruits of his creative work, as well as to enable all blind people to use information technology, engineers design displays for the blind . They are based on the same Braille alphabet that is used in books - a set of raised dots; they are felt with fingers and read the text.

A new solution to the problem was proposed by German scientists from the center "CAESAR" (Center for Advanced European Research and Research), headed by Dr. Bernhard Winzek. The display they proposed is based on thin films of several shape memory alloys deposited on a silicon substrate. Under the action of current, the metal heats up, bends and pushes the plastic pin. It is the person working behind such a display who feels it. Another electrical signal returns the pin to its original position.

The display turned out to be very economical: electricity, and even then in the form of short pulses, it needs only at the moment of the image of a particular letter.

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