This device is designed to automatically turn on exterior lighting after dark, and, accordingly, the automatic switch-off at dawn, which is always important, especially in terms of country of residence in order to save energy resources.
The power of the connected load is 200 — 500 watts. If the load is more si-mister should be installed on the radiator area of 50 — 100 cm2. It is possible to use a more powerful triac, for example ТС112-16-10.
Thrifty owners tradition harvested in the winter, various pickles, jams has always existed, but today it is particularly topical: products are expensive, and the purchasing power behind. At the same time the country is experiencing a suburban boom, and the plots — planting, greenhouses, fruit trees, berry bushes. Grown crop requires processing and canning for the winter, and that means rolling many cans you need the metal cap.
“Ah, summer red, I would love you, if not for the heat, and dust, Yes mosquitoes, Yes flies”. And although the high poetry of the great poet little combined with the dry prosaic lines, technical articles, these words can be safely put as the epigraph to this material. To stop the change of seasons in nature is impossible, and every year we have a “happening” summer, and with it come the usual worries of relief and localization of negative emotions, invariably manifested in humans with the appearance of annoying flying insects — mosquitoes, flies and other midges. To protect yourself from them, in nature and even at home someone buys a mosquito net, others treat themselves and family members with special insect repelling creams and formulations. However, possessing the skills, you can build a simple circuit protection device against mosquitoes, operating by using of ultrasonic radiation. What is ultrasound?
Coastal defense battleship General-Admiral Apraksin. Scale model 1:200.
The rapid development of foreign fleets (primarily German) forced to 1890, to revise the Russian 20-year shipbuilding program (1883-1902.). A plan to strengthen the Baltic fleet in 1891-1895 he was provided, among others, the construction of armored ships with shallow draft and heavy armament, designed for operations in inland seas, and defence of the coast. Simultaneously with the elaboration of the project attempts were made to obtain information about the foreign “the latest coastal ironclads and gun-boats”. From late 1889 to June 1891 MTC under the guidance of senior naval architect E. E. Gulyaev consistently prepared preliminary designs of the armored ships with a displacement of 3850 to 5500 tons.
The engineers of the German company E-Volo for the first time took to the air piloted quadcopter is like a helicopter flying machine, equipped with many small screws. With this design it is quite compact, lightweight and inexpensive. Multicopter with several screws already in place, but still, they were unmanned and controlled by radio.
IN THE ROOM:
(01) Lavrov A. Young innovators;
(03) Wells V. – Faster than the wind;
(06) Krivonosov L. – the ABC of shipbuilding;
In the room with high humidity on the surface of water pipes settles a large amount of condensate which is flowing down to the floor, leads to a rapid corrosion of metal pipes.
You can finally do something with my old LCD monitor lying around in your garage. Turn it into a spy monitor! All around it will look just white screen, but not for You, because You have a special “magic” glasses.
This advice will be useful to motorists, loving care and not shy to Tinker themselves with their car.
In the processing plane of the edges of the wooden parts is difficult to adjust so that the tool cannot slip sideways and did not spoil the work.
