During the experiments, building various electronic projects there is often a need for a DC source of relatively high capacity. For example, the battery voltage of 4.5 V is composed of three elements of “373.” To do this, you can put them in the original container tape out cut Velocimetry (see “M-K”, 1986, № 4), bonding like candy wrappers, wrapped in heavy paper (“M-K”, 1988, № 6), or dock in a unit with paper capsules-“shirts” from the same items (“M-K”, 1989, № 11). But still to provide a sufficiently reliable contact in such cases is not always possible. That is why many are still doing the old-fashioned way — connect the elements with each other lengths of wire with rations.
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Nice in the dark frosty evening to sit by the radiant heat of the heater. But it becomes more comfortable when in it, like in a real fireplace, flickering “flame” and crackling “wood”. However, the industrial designs, simulation of burning firewood slowly, and all attempts to improve the installed impeller foil give only partial improvement results.
Repair of electronic devices in radio is associated primarily with the need to restore the holes and the possibility of damage to conductor paths of printed circuit boards. We offer universal soldering iron with suction device, solder and interchangeable tips will allow to replace the radio quickly and efficiently.
Every driver knows how it is sometimes difficult to start the engine of a car on a winter morning after long Parking. However, a relatively simple device powered from an AC mains voltage of 220 V will greatly facilitate this task. The device consists of two parts (Fig. 1), one AC power supply (voltage 12 to 14 V); the second part is mounted in the engine compartment of the vehicle. They are connected to each other using a special connector.
Burned out incandescent lamps, unfortunately, not to recover but to use their metal caps is possible. To separate them from glass bulbs, the bulb wrapped in a thick cloth and crushed. Then the caps carefully and thoroughly cleaned from the composition, which to them were glued to glass flasks. The Central contact with the insulator should remain intact.
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.
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.
When performing various jobs around the house was sometimes necessary to have on hand a source of electricity with lower than the normal network voltage. For example, to illuminate the water in the tank (to save the bulb from premature burnout of the filament), etc.
during the period covering the country’s public deficit even the most that neither is ordinary iron burst in a number of regions in the category of “trudnoreshaemyh”. And is — alas! — quite expensive. But for the resourceful craftsman to make the original iron, as they say, no problem. You only need to thoroughly want… unlike the hero of the once popular song where the words are in the title of this material, the success of saadeldin guaranteed.