The widely used electric guitar inherited its tuning from its predecessor—the six-string Spanish guitar. The highest note that can be played on the instrument is usually E of the 3rd octave (for comparison: on the violin this note is E of the 4th octave, and on the piano—C of the 5th octave). On most electric Read more…
WHAT IS BIOGAS? Recently, more and more attention has been drawn to unconventional — from a technical point of view — energy sources: solar radiation, sea tides and waves, and much more. Some of them — such as wind — found wide application in the past, and today are experiencing a renaissance. One of the Read more…
For water procedures there are quite a few different devices. In Russia, the traditional ones are the banya, the bathtub, and the shower. People say that the banya heals, the bathtub relaxes, and the shower invigorates. In addition, a shower is the quickest way to wash, not requiring any special preparations. In my view it Read more…
You can find all kinds of utility buildings on garden and dacha plots. Most often it is a tiny shed at the far end of the site or a large utility block combined with a summer kitchen. The disadvantage of such structures is the significant consumption of sawn timber. And most importantly, they take away Read more…
In household practice, a sealing paste known as “Mendeleev’s putty” has long been used: it is commonly used to seal the joints of the frame and glass walls of aquariums. This sealant is plastic at temperatures above approximately +45°C and does not crack after hardening. And although it is diluted by many organic solvents, it Read more…
Furniture for sitting is usually bought in matching pairs. For example, two folding armchair-beds. Over time they become morally outdated, an anachronism. Throwing them away seems a waste, but converting them… Such armchairs, made by the same factory, have matching overall and mounting dimensions. Because of this, after removing the side panels (legs) on each Read more…
Champignon cultivation began at least two hundred years ago. In the early 19th century these mushrooms were successfully grown by Petersburg market gardeners, with the peasant Osinin from Yaroslavl Province considered a pioneer. Whole dynasties of mushroom growers from Moscow, Novgorod, Tver and other major cities are known, who used specialised greenhouses for their production Read more…
“Not long ago, the chief engineer of one of the factories producing refrigerators, V. V. Ulyanovsky, called me. As it turned out, he was interested in the thermostat I built for storing potatoes on the balcony in winter.” This is how engineer-builder A. A. Rozhdestvensky somewhat unexpectedly began presenting his mini-vegetable storage. Then he showed Read more…
At first, like most beginner radio amateurs, I drilled the mounting holes in printed circuit boards with a universal tool — an electric hand drill. However, it turned out that for making small holes (less than 3 mm in diameter) and with high accuracy, a hand drill is a poor assistant. After breaking quite a Read more…
Whatever is planted on a garden plot—flowers, vegetables, shrubs, or fruit trees—every plant needs regular, and often heavy and prolonged watering. A simple device, successfully tested by me and serving reliably for more than one season, makes this job much easier. It is a kind of mini-irrigation system consisting of a plastic portable water supply Read more…
