What if you need to draw a circle, and a compass at hand is not! To get out of this situation by making a simple compass of the bent and strapped to the pencil in the right place for a stylus pen, as shown in the figure.
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In the first years after the Civil war, the Soviet civil aviation monopoly reigned all-metal aircraft of the German production. "Ukrvozduhput" preferred products of the company "Dornier"...
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Smoothly change the brightness of room lighting or hall comfortable with the thyristor voltage regulator (see Fig.). The scheme allows you to adjust the load voltage ranging from 220 V...
