I have designed the metal detector works on the principle of beating is generated due to the difference of the oscillation model and tunable oscillators (5-10-th harmonic, selects the nearest frequency). This allows to increase the sensitivity of the instrument to the point that it becomes possible to detect, say, a five-kopeck coin in the soil at 10 cm, and a steel manhole or pipe — to 65-cm depth. Performed on the available element base, a metal detector does not require careful tuning and maintenance. Power supply — galvanic battery “Crown”.
SENSITIVE METAL DETECTOR
Simple circuits sound LEDs turn on electronic devices
Ax with a straight blade is used successfully in meat cutting, but for chopping wood it is not suitable: there are much more efficient is the blade of the carpenter type, with a rounded sharp edge. It is better enters the wood easily separates the chips. Therefore, the axe of a carpenter blade must be rounded 250 — 270 mm.
Farm tractor Kirovets K-700A. Scale model 1:32.
You still keep fur hats, wigs and hats on the shelf of the Cabinet? Meanwhile, the creators of these hats is strongly recommended to keep them worn on special mannequins — thus things do not crumple and keep the form longer.
To save space in the closet and to facilitate the selection of clothes will serve as a multi-storey racking. It can be made from a sheet of thick plywood, Plexiglas or any other plate.
Fencing located at the window the seedlings from direct sunlight or “curtain” of the glass will be without curtains, if you make frosted glass. It does not have to resort to abrasive.
You have a problem — not what is sour cabbage and salted cucumbers? In fact, the coming fall always provokes a deficit of three-liter cans. Well, in my family, this problem does not exist here already for a few years we use for this purpose plastic bottles from under drinking water with a capacity of five and ten litres. Of course, they have a small mouth, and shove it through the cabbage or cucumbers difficult, but that’s no reason to abandon such a capacious tanks. As it turned out, to provide them with cover is not too difficult.
3D puzzle is a special puzzle game. Just imagine your hands you collect miniature replica of big Ben or St. Basil’s Cathedral. And, maybe you are interested in cars, planes or military equipment? For kids too, there is a three-dimensional jigsaw puzzles – for example, fairy houses.
You are going on vacation? What are your favorite flowers? Do I have to beg relatives from time to time to stop by your apartment to water the ficus and crocuses?