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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It never hurts to have your own car, in addition to the cigarette lighter socket, and even first connector, adapted to USB or even mini USB. Such adapters are useful in many cases, for example, to power peripheral equipment of PC, charging mobile phones, video recorders of events and everything is designed under USB power. This is quite possible.
Electric hand drill machine (or drill) there are many home craftsmen. But its opportunities will be wider if it is to provide a speed controller. In this case, the tool, in addition to its direct purpose, can be used as a screwdriver, and as a machine for winding coils. In particular, the design of the boring machine of IE-1019А allows you to embed an electronic controller in her butt — in the place where is located the entrance of the condenser, and the start button and variable resistor to set the handle of the tool.
Hard for the uninitiated to understand anglers who sit all day, as if hypnotized, with a fishing rod, not taking his eyes off the float. Of course, patience in the end lost even the most avid, especially if the fish are not often pleasing bites. Therefore, many experimenting, testing in practice, various devices, signaling a bite. Considerable help in providing electronics. An example of this is a simple electronic device which allows you to monitor from up to four fishing rods — the bite on any of them will notify you of the light and sound signals. Indicator can be use by fishing from the shore, from boats and off the ice, determining the time of the bite to any of the four fishing rods in the evening and at night, and stay at some distance from the place of fishing.
Automatic device can be used in various models, toys that when meeting with obstacles will change their movement, as well as in everyday life (villages, for example, in the chair the lights went on in the lamp, the music began, earned the fan); to turn the light on in the premises (hallway, room, pantry); for the car alarm.
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.
Not long ago, musical instruments even pop bands — be it saxophone, violin, accordion, piano, double bass and even a drum — gave his listeners a natural, “natural” sound. Today music has become different — is now in Vogue “electronic” sound.
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.