Design welding transformer I have, so experience in this are. I want to offer the readers of my last — as it seems the most successful — the development of a welding machine is not entirely conventional design.
WELDING OF… NOTHING
INSTEAD OF SEALANT
Threaded connections, plastic drain pipes kitchen sinks are very fragile. And not only that I tried to make them sealed: and changed the pads, and wrapped around the pipe with rubber harness — nothing helped. And bailed out of the ordinary ski wax. As it turned out it is quite possible to use instead of Read more…
OBEDIENT TRAILER
After reading in the “M-To” article V. Sedov, “the Trailer for “Jupiter” I thought that the exchange of experiences, ideas and technical solutions encourages and facilitates the work of Amateur designers. Perhaps my thoughts and study will interest readers, come across them on new interesting solutions or at least will help in the technical work.
Steamer from childhood
What is usually associated the term “straight-through”? Of course, with aircraft jet engines to achieve the highest supersonic speeds. And how can become a propulsive ship …? This is what we tell you today. “The heart of The engine,” the proposed mikrosudna is an unusual device, based on the principle of action on convection. Recall that a similar effect is found in the use of liquid cooling devices of some automobile engines ( “Trabant” and others). On these machines, the water circulates independently, as warmer tends to rise up and fall down cold. Thus the cooling system of “pumping” water without using any pump.
“SCHOOL” TIME
When designing equipment for the new sports season to our members once again raised the question of finding a middle ground between championship superparty and sverhpredelna models for beginners.
MINI JEEP “PONY”
It just so happened that the car in our country is becoming less of a means of transportation and all more luxury. Accessibility for a person of average wealth — not a speculator, not a businessman, not a banker close to zero. Those hundreds of thousands of rubles, I ask today for any car, not save any “works righteousness”.
THE LIGHT WILL ACTIVATE THE SIREN
The proposed German magazine “Funkamateur” light relay is activated when light falls on the photoresistor R1 (see diagram) — when this occurs, a loud siren sound. Transistors VT1, VT2 equivalent odnoimennogo of the transistor included under the circuit of the sawtooth generator. The oscillator frequency is determined by the capacitance of the capacitor C1, the internal resistance of the photoresistor R1 and the resistor R2. Transistors VT3, VT4 included in the Darlington circuit, perform the function of the AF amplifier. It is possible to replace. Photoresistor — any domestic; transistors: VT1 – КТ3107, KT361, КТ203; VT2, VT3 blocking – KT315, КТ312; VТ4 – КТ503, КТ603, КТ815 with any alphabetic indexes.
“GRUPAS” BUSINESS AND SPORTS
As a rule, the design of velomobiles produced by homebrew are applications. That is, if the velomobile is designed for sports, speed runs, then all of its design features correspond exactly to this, and it is unlikely such a machine will be able to exploit an older person for the daily commute. And, on the contrary, completely eliminated the sports participation of household malogruzovaja-workers. This distinction is understandable, since for velomobiles of different types of completely different design principles, design loads and as a result design components and parts, design. But as it turned out, “harnessed to a cart horse and quivering DOE” is still possible. Confirmation of this — I have made velomobile “Grupas”.
WITH SAIL – IN THE HANDS
In the early 70-ies I happened to be a member of origin in the country of Windsurfing. In those years, sailing enthusiasts Board has high hopes for its extensive and widespread, but, unfortunately, a truly massive this sport did not, although the number of adherents of the sail increased significantly over the past two decades.
THE ELECTRIC GUITAR IS OUT OF THE ORDINARY
Talking about various musical instruments, it is impossible not to recall the, perhaps, popular and indispensable in modern orchestras and rock bands. Of course, this is the electric guitar.
