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.
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.
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.
In these troubled and difficult time when the crime situation every year more complicated, the important importance of watchdog and signaling device that protects property from encroachment by criminal elements. Among these developments, I have designed instrument, to collect which can anyone, even a novice radio Amateur. Using as actuator recorder of any type, on a looped tape which recorded tigrama barking dog, it simulates presence in the building watchdog. And the electronics triggering happens at the moment of approach or touch of a human hand to the castle.
Want to improve your capital on the lamp. Say equip it with a dimmer glow (which is especially important when watching television), and compactly built-in outlet, resulting in the lighting device have an additional opportunity to serve as a kind of extension! Then feel free to tackle The more scarce parts and assemblies necessary. As, however, and a solid knowledge-experience in the field of electrical and radio engineering.
Do you think what is common between math and electronics? Readers familiar with digital technology, recall that the mathematical laws of Boolean algebra the basis for the action of logic circuits. But that’s not all. It turns out that in mathematics, and electronics often use this concept as a comparison. But if you have to compare them with other numeric values, in electronics there is a comparison of the electrical signals. To perform such operations even created special devices — Comparators.
