10 years — 15 ago, the industry was widely released table lamps with fluorescent lamps, designed for a voltage of 127 V. A today 127 V network was preserved only in rare homes. It is clear that the owners of these lamps was now “tied” to expensive and bulky step-down transformers. We offer our readers we developed and tested a device that allows you to include a 127-volt lamp in the network a voltage of 220 V without the step-down transformer.TRANSFORMERLESS INCLUSION OF LDS
10 years — 15 ago, the industry was widely released table lamps with fluorescent lamps, designed for a voltage of 127 V. A today 127 V network was preserved only in rare homes. It is clear that the owners of these lamps was now “tied” to expensive and bulky step-down transformers. We offer our readers we developed and tested a device that allows you to include a 127-volt lamp in the network a voltage of 220 V without the step-down transformer.
Futurologists from the technique, predicting the future of ground mass transport, a clear preference is given to the development of electric vehicles. However, until now, despite the efforts of scientists of several countries have not yet created a cheap, economical and quite powerful electrochemical generators. Modern lead acid batteries after more than a century of development almost completely exhausted its possibilities.
Sealed alkaline nucleotidase (NiCd) and Nickel-metallgidridnye (NiMH) batteries are finding increasing application not only in industrial devices but also in home appliances, replacing batteries size AA and AAA. But these batteries, like any other, eventually “emptied” and require charging. To recharge, as recommended by the instructions for use and marking of the batteries themselves, through them must pass through the current ICT = 0.1 mA from the numerical value of the nominal capacity C for 12 — 16 hours.
The design uses dynamic heads 0,25 GD or similar without any alterations. Ear cushions and pillows are made of a rubber sponge (you can buy in the pharmacy). For heads with a cone diameter of about 55 mm suitable sponge about the size of 155X60X35 mm. First take a piece of pressshpana or solid cardboard the size of 130X130 mm. In it cut a hole and glued it to the head (Fig. 1). Then, in the spongebob ear cushions cut out (or pluck) recess the speaker housing (Fig. 3), and the sponge-cushion (Fig. 2) make the hole oval. Its inner edge is cut from the side adjacent to the ear.
When decided to do the car (the material about it were published in the “Modeller-designer” № 5, 2007), then I faced a problem — where to work? Not under the same open sky in the courtyard. A temporary shed or even the shed again to be fully rescued in the cold season they also work practically impossible. But because the car manufacturer could drag on for years.
The Russian Federation is the only country possessing the technology of ekranoplane. In addition to the giant apparatus created under the direction of R. Alekseev, developed and are small, designed for local “airlines”. An example of this is a twin-engine 10-seater airplane EP-7 “Ivolga”, created under the leadership of Vladimir Kolganova EP-7 made according to the classic scheme of the aircraft with a composite wing. On the wing of small aspect ratio located displacement hull floats and propellers in annular channels.
The functions of the boring machine can run, and milling. Of course, at a lower level of precision, but for many works this is not essential. For such conversion we recommend you to use developed in Valuyskiy young technicians universal boring head: it impresses manufacturability and simplicity.