Himself an electrician

The era of universal shortage has prompted us to create the things in the shops it was impossible to find. However, the era of abundance has not stopped this process. Apparently, a modest domestic work is now subject to other laws dictated by market prices or a passion.

There are situations when the lighting is required to manage not one, but two places. For example, when you need to turn on the light when entering in a number of areas on and off when you exit from the common hallway. The situation is similar in terms of covered walkway, tunnel, greenhouses or the like of the long room.

My invention is very simple, but quite important as regards health. The practical need for it — there. It is known that in the sinus, the number of colds and other diseases requires the heating of the nose and maxillary sinuses. Better suited for this UHF-therapy. However, at first, excessive exposure to currents of UHF may prove harmful to the body, and secondly, this equipment is complicated and cumbersome road. Therefore, this method of treatment, despite its advantages (depth of penetration, and disinfecting effect), not very applicable.

We offer a simple pocket radio with low voltage power from the supercapacitor. The receiver is fully on transistors, because the low voltage does not allow to use the existing chips (e.g., 174ХА10). Receiver of direct amplification, which provides sufficient volume to broadcast stations in the medium waveband and working in a range of supply voltages from 2 to 0.9 V.

In the “M-K” appear frequently describe designs that use integrated circuits. The production of these modern elements are so expanded that their widespread introduction in household equipment and in the development of ham radio now is no surprise. However, there still exists an opinion that “communication” is with chips only available to experienced hams. Meanwhile, in the chips can be used to create simple devices to collect that it is easy even for those who make their first steps in Amateur radio.

Fluorescent light (LDS) are widely used today in various industries and in everyday life. Unfortunately, the durability of LDS is extremely low. Their weak spot — helix required for the ignition of the phosphor inside the lamp at the time of inclusion. Two of them — from both ends of the lamp, and if even one of them burn out, to include LDS with the standard circuit (containing inductor, capacitor and starter) is impossible. In such a situation it is necessary to change the blown bulb with a new one. Therefore, where there are a large number of lamps (for example, in manufacturing plants, apartment buildings, stairwells and other similar cases), during the years of operation goes down and accumulates a lot of LDS with blown spirals.

Alexander Konochkin — student of the physical-technical faculty of Tomsk state University. The choice of the future profession is not accidental — since childhood Sasha enjoys improvised technical creativity.

Playing the electric guitar that uses the effect of “wah”, artist often have to press a pedal of a special electronic device. This often distracts the attention of the guitarist. In the console, the description of which we offer today, control the “wah” is made automatically from the signal of an electric guitar — like playing solos and chords. The device can be used with the pedal “wah”, in which alteration of the timbre is a variable resistor.

Multifunctional device consisting of copier, printer and scanner (hereinafter, MFP), it is useful not only for home or office desktop. In practice, there are times when a copier, printer or scanner is required to literally “here and now”. For example, they are often necessary for a “hike” in state institutions. The device is so popular in modern life, when visits to bureaucratic offices require copies of the documents becomes irreplaceable. It can be used to scan the same documents and prepare them for sending via e-mail.