The device, whose scheme is published in the journal “Popular electronics” (USA), produces a positive pulse when a sound (for example, firing of the gun) reaches the microphone B1 (see diagram). The variable resistor RZ adjust the sensitivity of the instrument, and the led V4 indicates it is turned on. Break contact S1, the finish associated with a ribbon, breaks the supply circuit of SCR V5 as soon as the athlete crosses the finish line.THE TIMER CONTROLS THE SOUND
The device, whose scheme is published in the journal “Popular electronics” (USA), produces a positive pulse when a sound (for example, firing of the gun) reaches the microphone B1 (see diagram). The variable resistor RZ adjust the sensitivity of the instrument, and the led V4 indicates it is turned on. Break contact S1, the finish associated with a ribbon, breaks the supply circuit of SCR V5 as soon as the athlete crosses the finish line.
Is it possible sensationalism in modern automodelisme? Honestly, the boys of our group were sure that no. It seemed to them that has long been found-perenity all the design options and decisions that the task of the athlete is only to compose the best nodes in one model. But one of the departures on the training time made everyone think differently. It turned out that the young aces, who have had sporting success, I know is not all that possible improvement of even simple models has not been exhausted.
When grinding surfaces usually use bars wrapped around or nailed sandpaper. It is impractical, often have to throw away the pieces with a wide, completely untouched edges. We offer sanding pad consists of two parts: head with studs-studs and template with the response holes. Spikes — regular nails Ø 5-6 mm.
Now even at primary school pupils the abundance of tutorials and various secondary sources. So the books were always at hand and at the same time did not create the mess table, make this simple shelf-stand, resembling a lying letter L. For making it suit any slats, strips, fragments of hockey sticks, old furniture Naini and other improvised material.
I offer a sketch of the room sports equipment for children 5-8 years: “double” the horizontal bar or uneven parallel bars. The main advantage of the simulator is that it can be dismantled in a minute and clean under the bed.
This comfortable chair can make even a novice handyman. Tools required hand saw, hacksaw, planer, chisel hammer, Yes; materials — the cross-bar 65X35 mm and 35X35 mm, round rods (e.g., shovel handles), furniture upholstery or decorative fabric and foam for cushions.
At the last Moscow on competitions of athletes-boys, the attention of the participants and the judges drew a graceful microtiter Victor Moskovkina for long races in the class FSR-3.5 mm. First impression — the model is made high level in the form of a matrix, which is used to veclachi of the buildings of our leading masters. But then one of the comrades of the young designer super model cried through all the area of training: “Victor, get your box soon! In a few minutes your ready!”
This miniature machine probably would have liked the fabulous character of the story Leskov. With him making nails for flea horseshoes would not like the faster! However, it was a joke, but seriously, the lathe of microstock by V. Shpakovsky will be indispensable for the copyists in all cases where it is necessary to recreate the chiseled details.
For 10 years I read the magazine “modelist-Konstruktor”, and from year to year it is more and more like me. However, all this time was your “dependent”: only used published drawings for home-made articles. And here decided to talk about one design, an idea that arose when reading the article from the “Club home of the masters” — a two-story version of the children’s area.