The scheme is simple electronic guard device published the magazine “Funkamateur” (GDR). Across the doors of the protected object stretched thin wire. Until he is whole, the tension on the bases of the transistors VT1—VT3 are few and they are closed. In case of wire break on VT1 through a resistor R2 receives the bias voltage, and this semiconductor device is opened. Now, through a chain of R2—R4, the transistor VT3 will get more offset. Relay K1 will work, and its contact system will include a siren, a buzzer or a lamp. Moreover, the elimination of wire break will not change the situation is to disable the watchdog is possible only with the switch ЅА1.
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For soldering of carbide inserts on tool holders turning tools, local hardening tool, soldering brazing small parts using heating by high frequency currents or by the flame of a gas burner. However, HDTV equipment bulky and expensive, it is not for the home workshop or school group. Use the gas burner all the rules can only welder qualifications.
Today, we first introduce you to the most massive representatives of the ship-class F1-V. This high-speed RC ships with engines working volume of 10 to 15 cm3. One of the most successful developments in this subclass is the model A. Baidebekova.
Villages without running water now, a little, but his presence in every rural home is rare: still dominated by collective hydrant.
Inaccessible part of kitchen table will be within reach if the shelves are in it to make a semi-circular and rotating.
Drying the washed linen in the apartment is always fraught with troubles. No matter where it was hung in the bathroom, kitchen, balcony or loggia, is a place for many hours is filled with rows of rope, weighed down with wet things. So they do not interfere, rope trying to fix, usually higher. However, getting rid of one inconvenience, get another: has to stand on a chair or stool. And this is unsafe.
The editors have received many letters on the publication of “Biogas: and warms, and cooks” (see “M-K” № 1, 1987), based on the materials of the Romanian journal “Technium”. Of readers was attracted by the subject and documented in the design. Many are interested in the details of the devices bostanova, asking how to make the individual nodes. Further clarification and recommendations for possible solutions to the structural elements gives our consultant engineer P. Zach.
On a lovely summer day it would be good to get out with baby on the nature, but with a stroller is not very removed from the tracks — not that she’s “passing”. And without strollers how to create a child needs sleep? However, if you take advice, published in the Bulgarian magazine “Caprese yourself,” it is easy to make such campaigns a sort of “sleeping bag” baby — cloth suspended, like a hammock, bed, which is very convenient to walk in the woods.