In the days of preparation to the XVII Congress of the Komsomol, the Central Council of VOIR, the Ministry of light industry and the Ministry of education of the USSR adopted a decision to hold from 25 April 1974 to 1 March 1975 the all-Union contest for the best sample of IG| tabs and items for children’s technical creativity. The main goal of the competition is to promote the further development of children’s technical creativity, expansion and strengthening of its material base, to find new means of propaganda of achievements of science and technology in the most accessible for children and adolescents form.
COMPETE TOYS
The lessons of the Second world war, naval warfare was not quite obvious and understood immediately. The first attempts of consideration of combat experience led to the emergence of the destroyers, though having excellent characteristics, but is quite traditional in concept (described in previous issue). A clearer awareness of their role took a lot of time, so shipbuilders in many countries have decided to pause or be limited to only experimental ships.
A new generation of bombers-the monoplanes, which differs from the preceding higher performance characteristics, appeared in many countries in the period between 1932 and 1935. As a rule, they all had all-metal construction, smooth lining, retractable landing gear and closed cockpit. The flight speed of some exceeded 350 km/h, which combined with strong defensive armament made them almost invulnerable in combat with fighters of that time.
It happens that the recorder or the player when you rewind the tape “do not pull” due to the large current hooked the batteries. And in many electronic games such as, Brick game (“Tetris” in China), when you enable sound for the same reason, begins to noticeably flicker LCD screen.
The homebrew is often used segments of rubber hose as a flexible coupling when connecting coaxial shafts, particularly in those cases where the rotation speed is small, and the shafts are not strictly coaxial. This way I decided to apply when I built the frame of the greenhouse from the chimneys of the old clamshells.
Almost all the Maritime powers of second rank, trying to create or radically change the torpedo power in the period between the world wars, faced a dilemma: either to buy the ships on the side, getting into the political and material dependence on the supplier, try to build their own, developing its own industry, creating jobs, but often at the risk of a delay, the main task for several years.
The family of adapters, recently appeared a lot of new, specially designed for automatic recording of signals from the telephone line to the household VCR. Part of this apparatus includes, generally, a node of coordination of polarity and level of the input signal, and threshold-switching device.
I offer a homemade device allows you to control voltage vehicle electrical system. In particular, that’s all right — the battery is charged and generates the required 12-14,8 V, the signal indicator is green light. At lower voltages the light turns yellow, and when elevated — red led.
Since ancient times people admired the music box. Their creation was only very skilled mechanics, who had besides an ear for music. Now the progress of technology made it easier. Electronic box whose schema is shown in figure 1, may collect even the ham is not very high qualifications. But a musical ear is still required.