In my opinion, the most effective seem to be those developments that do not need to “up from zero”: we will focus on improving ready-made industrial electronic devices on their own. The result is a very modern functional design, one of which I bring to your attention. This is an additional node to industrial flash SEF-1 produced once the millions of “copies”.
Homemade welding machines are engaged not the first year. In their manufacture into account the advice and recommendations of the “Model construction” and other well-established technical publications and reference literature. Started with “Welding baby” (No. 11, ’87), using the Latr ready with the primary winding. For secondary — recommended magazine, Shino-wire not found. Dare to wind the desired number of turns of the flexible stranded wire 6 mm2 in vinyl insulation. And what? Of course, such a device quickly overheated even when welding of cellular electrode. To somehow solve the problem associated with cooling, have decided to omit the “svarochnik”… in the water. Came from the fact that the secondary winding is great for insulation. And primary, which went before the slider wasn’t exposed as proactively managed to cover it in several layers of protective varnish.
Many quite rightly believe that automobilism is one of the most exciting and spectacular forms of diverse technical activities. Here you can find a lot of sharply differing from other classes of models, including, it seems, the whole conceivable spectrum of interests of athletes and fans of all ages. However, in automodelisme there is a continuous development. Today, we are talking about a completely new class of RC — “Buggy-8D”, which in Russia is more than short. The first official information about it was entered the Central self-similar club in edition of changes and additions to the rules of the competition for the self-similar sport at the end of 1993. In the same year took place in Tambov and the first “booster”, the championship of Russia in the new class. Participated athletes using exclusively machine-handmade. Unfortunately, the result of these competitions was due to poor weather conditions is almost zero.
It would seem that can be the total electric drill hole puncher, washing rubber (eraser) and a paper clip? But O. Lavrov, who considers himself a graduate of our magazine, was able not only to see it shared, but make stationery to work successfully in a number of original technical solutions. As a result of normal (and battered) drill inquiring of homebrew has expanded its typical “drill-tocil-wide” function. Now she can, if necessary, and tighten screws to Unscrew, and if you really itch — even a jigsaw or hacksaw would work tolerably well. All you need is the right tooling (this material is not considered).
In the Russian self-similar sports, as worldwide, the most popular class of RC 10L. RC little micro-car is equipped with a motor of the type “Mabuchi-540” and the battery pack of the six elements. Control occurs through two channels — the turn of the front wheels and speed control of the motor. Competitions are held on the track, marked side; it can be fitted inside (in the hangar, hall, indoor stadium) and the outdoors. Body patterns repeat! real racing car in scale 1:10.
Thank you so much, friend magazine, for the development of welding transformers. Inspired by the publications took a chance and made themselves compact, but quite powerful “svarochnik” based on “on the margins” of the burnt stator from a induction motor. Now that dream is about as good design of the rectifier… help me out, dear journal. On you one hope!
Industry now available good double wire with PVC insulation, which occupies when winding on the bobbin a little space. So there is no need to do cumbersome carrying, about which the magazine wrote some time ago. However, the idea Tihonovich from Kharkov (“modelist-Konstruktor” No. 10 of 1985) good. So I decided to develop it further, making the appropriate changes.
ULF bass reflex on one first transistor. Numerous calculations and experiments to create powerful high-quality low-frequency amplifier has led me to believe that the most promising way to the design is to use a phase inverter on one first transistor. It is curious that such amplifiers could be forty years ago, but this has not happened due to a number of reasons.
For several years Samsung cell phones are available with the new universal (multi-function) mini-connector. Compact and flat (see photo), it provides charging from the adapter, connecting headphones, connecting to USB port of personal computer (“data cable”) to operate the phone as a modem and many other features.
