led lamps and fixtures – is the fastest growing industries in the field of led products. It has already transformed our lives, giving us a unique energogsberegayuschie projects, for example led coverage of the whole island (North Dumpling Island) led lamps and lighting fixtures. What can you expect from a semiconductor technology in the field of energy and energy conservation? The most obvious (but not unique) perspective – it alternative form of lighting, which should in time take the place of our usual incandescent bulbs. We explain the principle of action of various lighting and consider the energy conversion efficiency for each of them. Normal incandescent bulb, only 10% received energy radiates in the form of useful light, and it is not white, and yellow.
The remaining 90% is spent on heating. Why so low efficiency and can be any way to fix this? The fact is that in such a light bulb, as you know, glows red-hot coil, and the emission spectrum of a heated body depends mainly on its temperature. Our eyes adjusted to capture the light emitted by the Sun's surface, which is red-hot up to 6000 degrees. In other words, the sunlight on its spectral composition as the optimal time for an eye. The filament in the bulb, of course, has a much lower temperature, so it is lit in a very different spectral range (IR), and only a small fraction of the emitted light bulb light falls on the visible spectrum. How can that be? If the light source is an incandescent filament, then the only way to increase efficiency – is raise the temperature of the filament.
As mentioned in the Old Testament: "And will all the earth: bordered by filaments'. It seems that these words were indeed prophetic. Now Globe surrounded by hundreds of thousands of electrical wires. So what, you say, we also have to live somehow, we are accustomed to refrigerators and TVs, do have to give up all this not to be afraid of the offensive end of the world. Yes, refuse from anything you do not want to only to the extent possible to protect themselves against effects of electromagnetic fields. It is understandable that snacking on house wires are not needed, but consider in what place is your house or yard. Scourge of many cities are building lots under the power lines (power lines). Berries, vegetables is possible, but work on these gardens can not.
Unfortunately, the gardens and lined them houses that are in close proximity to power lines, are there illegally, and hence the norm the correct location are not met. Since it is impossible to completely change the situation, it is necessary in any case, to protect themselves from harmful effects of power lines. First, power lines generate magnetic fields. Normal, not leads to oncological diseases of the magnetic field is level 0,3 – 0,4 mT. Secondly, apart from the magnetic field generated by electric fields. There are sanitary protection zones, within which is prohibited build houses and public buildings.
Here you can grow those crops that do not require a long stay of the person and the use of manual labor. The electromagnetic field of the line is dangerous to health. A person may develop cataracts, broken kroei circulation in the vessels of the brain. Butterflies, for example, try to fly away from electrical wires, the plant under power lines, develop various abnormalities – extra petals, a new form.
Original form was made of silk, hence the old name – screenprint, later – of synthetic or metal mesh, spanned by a special frame. The principle of screen printing is the bursting of paint to the printed material through the open print form elements. Scope of screen printing using the fruits of Screen printing, sometimes we do not notice its application. Any modern avionics or television device includes electrical boards that hold and connect with each other through the radio components narrow copper traces.
To receive this payment, you must etched copper foil glued onto a thin plastic plate. Figure future electrical circuits causing acid paint or varnish. For one Instance enough brush, but the mass production required thickness of the protective layer can be applied only to screen printing. After etching in addition to print all the marking electronic components according to their future location for the scheme. That greatly simplifies the assembly. Stencil sizes are limited only by the produced mesh fabric and forms printed frame. This allows us to make giant signs and images for street advertising, decorate tents trucks or shop windows. The uniqueness of screen technology is that it is possible to use a wide range of printing inks at various relationships that allow you to work on any material: paper, plastic, glass, fabric, etc. In addition to color, through a stencil convenient to apply the various paint coatings and adhesive layers for manufacturing self-adhesive films and using bumag.S screen printing can produce prints on flags and banners, sports and travel bags, coarse fabrics, from cotton and linen canvas.