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Electronics & Electrical Articles
Page 47 of 47
How does an FM radio set work?
The FM receiver is the whole unit which takes the modulated signal as input and outputs the original audio signal. Radio amateurs are the initial radio receivers. They had got drawbacks such as poor sensitivity and selectivity.Selectivity is the selection of a particular signal while rejecting the others. Sensitivity is the capacity of detecting RF signal and demodulating it, while at the lowest power level. Both Selectivity and Sensitivity should be high for an FM receiver. To overcome these drawbacks of the ordinary receiver, the superheterodyne receiver was invented. This FM receiver consists of 5 main stages.RF Tuner SectionThe modulated ...
Read MoreWhat are the modes of operation in a helical antenna?
A helical antenna is another type of wire antenna, which is widely used for a higher range of broadband VHF and UHF applications. The frequency range of operation of the helical antenna is around 30MHz to 3GHz.Helical antenna or helix antenna is the antenna in which the conducting wire is wound in a helical shape and connected to the ground plate with a feeder line. It is the simplest antenna which provides circularly polarized waves and used in extra-terrestrial communications in which satellite relays etc., are involved.It consists of a helix of thick copper wire or tubing wound in the ...
Read MoreWhat are some of the applications of LASER?
LASER is an acronym for Light Amplification by Stimulated Emission of Radiation. The LASER action was first proposed by Einstein.Applications of a LASERA LASER can be used in many fields. Some of its usages are given here.Used In Welding and Melting: The laser beam welding is mainly used for joining components using high welding speeds and low thermal distortion.Used In Holography: The reason that a hologram cannot be made without a LASER source is that coherence length for laser source can be very high due to which sustained interference pattern will be recorded on a hologram. This suggests the indispensable ...
Read MoreHow can I take care of leather articles at home?
The Leather is undoubtedly an expensive material as compared to its available counterparts. However, its luster and texture often get ruined with time. But we can avoid it if we handle it with a little care... gentlemen!!1. Let It Breathe: When we purchase a new leather belt, it is often packed in polythene. But once you start using it, use a cloth to cover it and wipe it off with a clean dry cloth.2. Hang Straight: Never swirl and bend your leather belt. Indeed hang it straight onto a hanger.3. Store It In Shade: Sunlight or any harsh radiant light tends ...
Read MoreWhat are the latest electronic home decor devices used these days?
Home is where the heart is! And one feels like calling a house as a home if the home is well decorated or is made attractive using flowers or fragrances that please the senses. But, gone are the days when only flowers or bonsai plants could decorate home. The latest trend is the use of electronic devices for home decor.Some of them areClocks: Clocks were used earlier just to note the time. But, these have actually become a luxury symbol now. Not only the brand makes it look costly, but also the design. The other day, I went to a ...
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