Many readers of the magazine are building all kinds of model planes, ships, trains, cars and other equipment. However, for greater affinity with their prototypes it is desirable to “voice”, which will give them even greater appeal. Recall, for example, sounded like a train. First heard a gradually increasing noise of a train, then near the station he blows his whistle to his approximation, and stood, and noisily blowing off steam, making a sound like “poof poof poof”. Before leaving the station bell sounds, and the locomotive gives a farewell whistle before the journey.
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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.
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.
When developing propeller systems snowmobiles, trikes, aircraft and model aircraft designer is required to know the exact values of some parameters. And most importantly — the frequency of rotation of the propeller. It is necessary and when the force of the engines, and the selection of the propeller. The frequency of rotation is also one of the main parameters in the process of operation of the motor: the value of this parameter is possible to objectively judge the reliability of the engine.
Fun — fishing in open water. With the early spring as soon as the ice recedes, and until late fall the true fisherman whenever possible, in a hurry to the pond with the hope of a successful trophy. But it is not always possible to return home with their catch.
The proposed device is designed for automatic control of vibrionaceae Malysh, Rucheek and the like for operation in boreholes (wells) with a low flow rate of water or for periodic pumping of groundwater. Machine applied non-contact water level sensors, installed directly on the lifting hose of the pump, allowing it to be used in wells of small diameter.
Strobe and underlying his actions the same-name effect find application not only in discos, no matter how popular, attractive ones. And technology is no exception. How to make strobe lighting (based on a familiar to every photographer flash lamp IFK-120) and use it to adjust the system sariguney car, described in the following material.