Home
Search results “Transmission of radio signals”
Radio Waves
 
14:44
What are Radio Waves and how do they work?
Views: 666278 TheOnLineEngineer
How Radio Waves Are Produced
 
04:58
UNLOCKING THE MYSTERIES BEHIND RADIO WAVES. Electric current creates magnetic field, oscillating electric current creates oscillating magnetic field and not "electromagnetic wave" as current belief. Electron has a standing- electric field and magnetic field at right angle (watch video structure of electron). The flow of electrons in a conductor is essentially caused by the attraction between the electric fields of mobile electrons and "fixed" positive charges in the conductor. Oscillation of electrons in a conductor is caused by the alternation of electric polarity in the conductor. Because of electric field and magnetic field of an electron is at right angle, when oscillates the electric field of the electron will be parallel to the oscillation and magnetic field will be perpendicular to the oscillation.This oscillation of the electron creates transverse wave on its magnetic line and the oscillating magnetic line is radiated to space. http://www.amazon.com/author/atom http://www.facebook.com/novaphysica https://www.youtube.com/user/atommodel
Views: 775245 AtomModel
Electromagnetic Spectrum: Radio Waves
 
03:58
http://www.facebook.com/ScienceReason ... [email protected]: EMS Electromagnetic Spectrum (Episode 2) - Radio Waves The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. The "electromagnetic spectrum" of an object is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. --- Please SUBSCRIBE to Science & Reason: • http://www.youtube.com/Best0fScience • http://www.youtube.com/ScienceTV • http://www.youtube.com/FFreeThinker --- MEASURING THE ELECTROMAGNETIC SPECTRUM The electromagnetic (EM) spectrum is just a name that scientists give a bunch of types of radiation when they want to talk about them as a group. Radiation is energy that travels and spreads out as it goes - visible light that comes from a lamp in your house and radio waves that come from a radio station are two types of electromagnetic radiation. Other examples of EM radiation are microwaves, infrared and ultraviolet light, X-rays and gamma-rays. Hotter, more energetic objects and events create higher energy radiation than cool objects. Only extremely hot objects or particles moving at very high velocities can create high-energy radiation like X-rays and gamma-rays. • http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html --- RADIO WAVES Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Like all other electromagnetic waves, they travel at the speed of light. Naturally-occurring radio waves are made by lightning, or by astronomical objects. Artificially-generated radio waves are used for fixed and mobile radio communication, broadcasting, radar and other navigation systems, satellite communication, computer networks and innumerable other applications. Different frequencies of radio waves have different propagation characteristics in the Earth's atmosphere; long waves may cover a part of the Earth very consistently, shorter waves can reflect off the ionosphere and travel around the world, and much shorter wavelengths bend or reflect very little and travel on a line of sight. Discovery and utilization: Radio waves were first predicted by mathematical work done in 1865 by James Clerk Maxwell. Maxwell noticed wavelike properties of light and similarities in electrical and magnetic observations. He then proposed equations, that described light waves and radio waves as waves of electromagnetism that travel in space. In 1887, Heinrich Hertz demonstrated the reality of Maxwell's electromagnetic waves by experimentally generating radio waves in his laboratory. Many inventions followed, making practical the use of radio waves to transfer information through space. Propagation: The study of electromagnetic phenomena such as reflection, refraction, polarization, diffraction and absorption is of critical importance in the study of how radio waves move in free space and over the surface of the Earth. Different frequencies experience different combinations of these phenomena in the Earth's atmosphere, making certain radio bands more useful for specific purposes than others. Radio communication: In order to receive radio signals, for instance from AM/FM radio stations, a radio antenna must be used. However, since the antenna will pick up thousands of radio signals at a time, a radio tuner is necessary to tune in to a particular frequency (or frequency range). This is typically done via a resonator (in its simplest form, a circuit with a capacitor and an inductor). The resonator is configured to resonate at a particular frequency (or frequency band), thus amplifying sine waves at that radio frequency, while ignoring other sine waves. Usually, either the inductor or the capacitor of the resonator is adjustable, allowing the user to change the frequency at which it resonates. In medicine: Radio frequency (RF) energy has been used in medical treatments for over 75 years generally for minimally invasive surgeries and coagulation, including the treatment of sleep apnea. • http://en.wikipedia.org/wiki/Radio_waves .
Views: 396358 Best0fScience
AM and FM Radio As Fast As Possible
 
07:02
AM & FM radio have been around since way before the digital age. How can radios decode AM & FM signals only using analog technology? Freshbooks message: Head over to http://freshbooks.com/techquickie and don’t forget to enter Tech Quickie in the “How Did You Hear About Us” section when signing up for your free trial. Follow: http://twitter.com/linustech Join the community: http://linustechtips.com
Views: 448486 Techquickie
Transmission Media (Part 2) Radio Waves, Micro Waves, Infrared Waves
 
21:10
Transmission Media (Part 1) Twisted Pair Cable, coaxial cable, Fibre Optics Cable : https://www.youtube.com/watch?v=xHyJNkiGRd8&t= Keywords: --------------------------------------------------------------------------------------- Transmission Media (Part 2) Radio Waves, Micro Waves, Infrared Waves radio waves transmission micro waves transmission types of transmission media in hindi infrared waves wireless transmission media unbounded transmission media unguided transmission media transmission medium in hindi transmission medium in computer network transmission media in hindi wired and wireless communication wired transmission media guided and unguided transmission media in computer networks bounded and unbounded media communication media communication medium ----------------------------------------------------------------------------------------- Keywords
Views: 16927 STUDY Mafia
How Information Travels Wirelessly
 
07:56
Understanding how we use electromagnetic waves to transmit information. License: Creative Commons BY-NC-SA More information at http://k12videos.mit.edu/terms-conditions
Views: 180546 MITK12Videos
How Does Radio Transmission Work? | Iken Edu
 
08:05
How Does Radio Transmission Work? | Iken Edu In this animation script we will learn about Radio. For more videos visit https://www.youtube.com/ikenedu Follow us on twitter https://twitter.com/ikenedu Like us on https://www.facebook.com/ikenconnect
Views: 33845 Iken Edu
Transmission Lines - Signal Transmission and Reflection
 
04:59
Visualization of the voltages and currents for electrical signals along a transmission line. My Patreon page is at https://www.patreon.com/EugeneK
HOW RADIO WORKS - 1943
 
10:28
The theory and operation of early radio
Views: 281356 TheShootingstar31
Radio Frequency Transmission Full Tutorial
 
23:24
DOWNLOAD CODE HERE FREE: http://robotix.com.au/#/videos/94 LIBRARY LINK HERE: http://www.resistorpark.com/arduino-virtualwire-library-download/ Learn more about this tutorial here: https://www.instructables.com/id/433-MHz-RF-Links-Theory-Circuit-and-Program/ he video above explains the basic theory that relates to data transmission, namely how electromagnetic waves are generated by antennas and how they encode 1's and 0's. Non essential information for a hobbyist, but really interesting none the less. Component list: •1 X Arduino Uno •1 X 433MHz RF link pair •3 X LED •1 X Piezo Buzzer •1 X Push Button •1 X Resistor 330Ω •50cm Single Core Wire Equipment needed: Soldering Iron Observe the schematic and the completed circuit (video tutorial also available) Make sure you do ALL of the following: 1. Connect the module in the following manner Vcc pin connects to Arduino 5V GND to Arduino GND and DATA to Arduino Pin 12 2.The button connects to Arduino pin 2 and needs to be earthed 3. The antenna needs to be soldered onto the module. The antenna is 35cm long and soldered into an antenna slot in the transmitter module. 4. The antenna is to be straight if possible. Watch the video from time: 00:40 to see the circuit built from scratch -~-~~-~~~-~~-~- Latest and Best Arduino Playlist in Collaboratio with DFRobot: https://www.youtube.com/playlist?list=PL_92WMXSLe_86NTWf0nchm-EmQIwccEye -~-~~-~~~-~~-~-
Views: 56483 Robotix
Beginners: Radio Frequency, Band and Spectrum
 
23:28
This video explains electromagnetic spectrum, frequency, band, bandwidth and how these concepts are used in mobile technology. We also look at antennas for smartphones including 2G, 3G, 4G and 5G
Views: 34484 3G4G
How to build a FM radio transmitter
 
05:56
Circuit & Component layout: 0:33 in the video Feel free to leave a comment if you have any questions or concerns. Music by: e-soundtrax Parts list: -Transistor 2N3904 -Trimmer capacitor 2-22pF -Electrolytic capacitors 2X 47uF -Ceramic capacitors 3X 1nF 10pF 33pF -Resistors 22k 39k 47k 100R -Wires -Copper wire (~0.5mm diameter) -Prototype board -Antenna (anything you like) -Audio plug -9V Battery clip -9V Battery Tools: -Soldering iron -Solder -Pocket knife -Cutting pliers -Mini pliers -Bolt (~5mm diameter) -Ruler -Lighter -Candle wax -Electrical tape The best and most productive way to gather the parts for this project is to take apart and salvage old and or broken electronics appliances. This may take some technical skill. The safest bet is to purchase a fresh set of parts and tools (if you don't have them) Here are a couple online web-stores which sell the parts and tools needed for this project: http://www.amazon.com/ - amazon has all the parts and tools needed for this project. However, amazon tends to sell electronics parts in large bulks which means you are likely to pay for parts needed to build around 100 of these transmitters. http://www.conrad.com/ce/ - One of the greatest electronics web- stores in western Europe. You can cheaply buy individual parts needed for this project. http://www.lemona.lv/index.php?lan=en&toc= - One of the best electronics web-stores in eastern Europe. You can buy the parts needed for this project at very low prices. https://www.radioshack.com/ - One of the most popular electronics web stores which ship worldwide and sell all of the components at low prices.
Views: 786076 Lukas Ekers
Russia's Ghost Radio Station: What is the Mysterious Sound Heard on UVB-76?
 
11:40
No one knows for sure what is being heard when tuned into radio frequency 4625 kHz. Secret, coded messages sent across airwaves between governments and spies? A signal ready to sound an alarm? Or a mysterious transmission tuned to interact with the ionosphere? Known to be of Russian origin, though this has never been confirmed by the Russian government, the signal was a continuous broadcast of repeated pip that has since become an unsettling looping and buzzing tone. For decades, the source of the broadcast was entirely unknown, until suddenly and unexpectedly, the first spoken words on the station identified it as UVB-76, broadcast from a military bunker in Povarovo, a small town 19 miles outside of Moscow. This interruption was soon followed by new strange and unsettling additions: rustling of someone moving around nearby, a harsh voice reading a series of names and numbers, and faintly eerie music playing in the background… More Dark Docs: Fishing from Airplanes for Soviet Secrets: What was Skyhook - Operation Coldfeet? https://www.youtube.com/watch?v=dXmRYYjyKfE Why did Russia Abandon a Space Shuttle in the Desert? https://www.youtube.com/watch?v=HQIHSgpc0f0
Views: 399651 Dark Docs
How Radio  broadcast works
 
01:43
How Radio broadcast works
Views: 34720 Daniel Izzo
How Data is Transmited by RF circuits (Wifi, bluetooth, phone, radio etc...)
 
08:52
SEE THE THEORY IN ACTION HERE: https://www.youtube.com/edit?o=U&video_id=gkc9xN9pZ4Y The video above explains the basic theory that relates to data transmission, namely how electromagnetic waves are generated by antennas and how they encode 1's and 0's. Non essential information for a hobbyist, but really interesting none the less. Component list: •1 X Arduino Uno •1 X 433MHz RF link pair •3 X LED •1 X Piezo Buzzer •1 X Push Button •1 X Resistor 330Ω •50cm Single Core Wire Equipment needed: Soldering Iron -~-~~-~~~-~~-~- Latest and Best Arduino Playlist in Collaboratio with DFRobot: https://www.youtube.com/playlist?list=PL_92WMXSLe_86NTWf0nchm-EmQIwccEye -~-~~-~~~-~~-~-
Views: 64540 Robotix
Transmission of Radio waves Through Space
 
05:45
Physics_p-9-10-ict-5.mp4
Views: 3804 Sabaq. Pk
Radio Wave and Communication in URDU Hindi
 
24:08
Adeel Explains generation and transmission of Radio Waves.
Views: 16696 Takhti Online
Hertz and Radio Waves Explained
 
09:08
This video examines the experiment Hertz performed to validate Maxwell's prediction for electromagnetic waves. It also touches on his observation of the photoelectric effect. Prepared to help students doing the HSC in Australia, it is suitable in other juridictions as well. Please consider supporting - https://www.patreon.com/HighSchoolPhysicsExplained Find me on facebook - www.facebook.com/HighSchoolPhysicsExplained
5 Terrifying Radio Broadcasts
 
08:01
Radio is one of the biggest forms of media in the world. With this, there is defiantly a disturbing side to it. These are the ones that I could find. While you're down here, why don't you check out some more videos. If you like creepy stuff, this is the channel for you! Spongebob Bootleg Episode Creepypasta https://www.youtube.com/watch?v=H5t1J... 5 Scariest Clown Sightings https://www.youtube.com/watch?v=24lkV... 5 Most Disturbing Youtube Channels https://www.youtube.com/watch?v=nbkAv... Well, you've made it this far, so why don't you go ahead and subscribe. I have a new "Top 5 Scariest" video or a Creepypasta uploaded every week! Subscribe! https://www.youtube.com/channel/UCTBF... Music by Myuuji 5 89.9 WKCR is a radio station out of New York. This audio was uploaded by an anonymous youtube user. The recording starts with music, but it turns into a jumble of sounds, screaming and a female voice chanting numbers and names. It isn't known if the radio was hijacked, if this was a prank, or if this is a hoax all together. 4 A Russian radio station played a buzzing sound for over 4 decades. This sound is constant, but every few months or so, there is a voice relaying a coded message. No one knows the exact purpose of the message or even the station. All we can do is just assume its purpose. 3 Montana residents were warned of an emergency in 2013. The warning stated that the dead was rising from their graves, and were attacking the living. It also warned residents not to apprehend or approach them as they were considered dangerous. Similar events were reported in Michigan and New Mexico. Of course, this wasn't real. Instead a hacker found a back door into their emergency notification systems. 2 Vladimir Komerov is possibly the first person to go to space. Unfortunately, he never came back alive. He was the pilot of Russia's Soyuz 1. There were well over 200 documented problems with the spacecraft. Komarov knew this, but he still agreed to pilot Soyuz 1. Why would he do such a thing? Turns out he was protecting his backup, because he knew if he turned down the job, his backup would be the one to die. He was launched into space on April 23, 1967. While returning to Earth's atmosphere, the spacecraft failed to protect him from the tremendous heat. While returning to earth, he is heard cursing those who put him in that position. 1 During a discussion about Area 51, the radio host, Art, received a call from a man claiming to be a former employee of area 51. He was let go on a medical discharge, and he has been all over the country for an unknown reason. He explains briefly what goes on at area 51 to Art. His communication is suddenly cut off, and the radio broadcast ends as well. When they go back on the air, Art explains that they were unexplained disconnected, and that they were on a backup system.
Views: 21208 Nightmare Fives
How Long Does It Take for Radio Waves to Reach the Moon? : Lessons in Physics & Chemistry
 
03:07
Subscribe Now: http://www.youtube.com/subscription_center?add_user=ehoweducation Watch More: http://www.youtube.com/ehoweducation A radio wave is just one type of electromagnetic radiation. Find out about how long it takes for radio waves to reach the moon with help from an experienced educator in this free video clip. Expert: Walter Unglaub Filmmaker: bjorn wilde Series Description: Physics plays a very important role in the world around us everyday, even if you don't necessarily realize it. Get tips on physics and chemistry with help from an experienced educator in this free video series.
Views: 3676 eHowEducation
Flat Earth-Impossible Radio Transmissions
 
06:24
Even technology gives it away... First wireless broadcast was achieved in 1915 from Arlington,Virginia USA to Paris, France Europe. The distance between these two points is (approx 3900 miles) there should be (approx) 1,920 miles of curvature. Given that radio waves only travel in a straight line and that there were no relay stations (as this was the first transmission) how did the broadcast reach it's destination...The short answer is the radio waves did not have any curvature to contend with! http://time.com/4081211/transatlantic-speech-transmission-1915/
5 Strangest Radio Stations & Most Mysterious Transmissions
 
07:41
From an unexplained Russian radio station playing strange sounds, to the infamous Yosemite Sam broadcast... Here are five eerie radio stations and transmissions from around the world! ____________________________________________________________________ Don't forget to follow TOP5s on Social Media to keep up with upcoming videos, articles and new information! ►► https://twitter.com/TheTop5s ►►https://www.facebook.com/TheOfficialTop5s/ Special Thank you to CO.AG for the music as usual! If you are looking for music for any video production, games, movies etc. He is the man to speak to so check out his channel or send him a personal message! https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA Thanks for watching! Top5s
Views: 923226 Top5s
PROPAGATION OF ELECTROMAGNETIC WAVES PART 01
 
03:18
For more information: http://www.7activestudio.com [email protected] http://www.7activemedical.com/ [email protected] http://www.sciencetuts.com/ [email protected] Contact: +91- 9700061777, +91- 9100061777 7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use. PROPAGATION OF ELECTROMAGNETIC WAVES:In communication using radio waves, an antenna at the transmitter radiates the Electromagnetic waves EM waves, which travel through the space and reach the receiving antenna at the other end. As the EM wave travels away from the transmitter, the strength of the wave keeps on decreasing. Several factors influence the propagation of EM waves and the path they follow. At this point, it is also important to understand the composition of the earth’s atmosphere as it plays a vital role in the propagation of EM waves. A brief discussion on some useful layers of the atmosphere is given in Table. Ground wave: To radiate signals with high efficiency, the antennas should have a size comparable to the wavelength of the signal at least /4. At longer wavelengths i.e., at lower frequencies, the antennas have large physical size and they are located on or very near to the ground. In standard AM broadcast, ground based vertical towers are generally used as transmitting antennas. For such antennas, ground has a strong influence on the propagation of the signal. The mode of propagation is called surface wave propagation and the wave glides over the surface of the earth. A wave induces current in the ground over which it passes and it is attenuated as a result of absorption of energy by the earth. The attenuation of surface waves increases very rapidly with increase in frequency. The maximum range of coverage depends on the transmitted power and frequency less than a few MHz. Sky waves:In the frequency range from a few MHz up to 30 to 40 MHz, long distance communication can be achieved by ionospheric reflection of radio waves back towards the earth. This mode of propagation is called sky wave propagation and is used by short wave broadcast services. The ionosphere is so called because of the presence of a large number of ions or charged particles. It extends from a height of ~65 Km to about 400 Km above the earth’s surface. Ionisation occurs due to the absorption of the ultraviolet and other high-energy radiation coming from the sun by air molecules. The ionosphere is further subdivided into several layers, the details of which are given in Table. The degree of ionisation varies with the height. The density of atmosphere decreases with height. At great heights the solar radiation is intense but there are few molecules to be ionised. Close to the earth, even though the molecular concentration is very high, the radiation intensity is low so that the ionisation is again low. However, at some intermediate heights, there occurs a peak of ionisation density. The ionospheric layer acts as a reflector for a certain range of frequencies 3 to 30 MHz.Electromagnetic waves of frequencies higher than 30 MHz penetrate the ionosphere and escape. These phenomena are shown in the Figure. The phenomenon of bending of EM waves so that they are diverted towards the earth is similar to total internal reflection in optics.
Views: 210772 7activestudio
strange radio signals - what is this?
 
04:57
27.400.00 MHz scanning around 10m and 11m i came across this.. does anyone know what it could be? it sounds like some kind of telemetry but its a strange place for it to be.
Views: 7503 JohnDragonMan
Transmit Music To any FM Radio Device (Urdu/Hindi)
 
03:09
Transmit Music To any FM Radio Device SUBSCRIBE IT'S FREE : https://goo.gl/n3E1RT Buy FM Transmitter : http://q.gs/E61fe OR https://goo.gl/XXEeJd -------------------------------------------------------------------------------- BE SOCIAL WITH US ON Whatsapp : +12052911120 Facebook : https://goo.gl/8qNwtZ Instagram : https://goo.gl/8FkB9A GOOGLE+ : https://goo.gl/wCCdCu -------------------------------------------------------------------------------- Previous Video: https://youtu.be/NCPVYfIbBTE ~ Music Credit - NCS : https://youtu.be/f2xGxd9xPYA ~ Explain In Urdu / Hindi Series is Very Popular. ~. LIKE | SHARE | SUBSCRIBE FOR MORE VIDEOS LIKE THIS ~ THANKS FOR WATCHING! --ENJOY--
Views: 21342 All About Tech - Hamza
physics class 10 transmission of radio waves through space
 
06:31
physics class 10 lecture 4 chapter 17
Views: 89 Syed Osama
HackRF One Radio Signal Transmission
 
07:55
HackRF One radio signal transmission tutorial created by research interns at The Senator Patrick Leahy Center for Digital Investigation in Burlington, VT
Views: 2061 ChampForensics
Mysterious radio signals from deep space detected - 2019
 
02:20
Mysterious radio signals - detected mysterious radio signals from the depths of the earth. 2019 - Submission: mysterious radio signals have been detected coming from outside our galaxy michio kaku - mysterious radio signal from space. Il y a 1 heure - Proof of LIFE: Scientists record mysterious radio signals from deep space Radio telescope sounds · radio telescope homemade · radio telescope images · radio telescope documentary · radio telescope how it works · radio telescope diy radio signals detected in space approaching our direction... Scientists Are Still Perplexed By Source Of Mysterious Radio Waves From Space Stream Mysterious Radio Signals From Space by 98online from desktop or your mobile device If You Like What We Do And You Should Be Sure To LIKE & Subscribe. It Keeps Us From Having To Turn Tricks On Hollywood Boulevard Follow Us On Twitter : https://twitter.com/VidaLocaYT #Mysterious #Radio ----------------- SUPPORT OUR CHANNEL ----------------- Help #VidaLoca Make More Fresh Quality Content. Every Contribution Is Helpful, Big Or Small ------------------------------------------------------------------------
Views: 49441 Vida Loca
The Alien Wow Signal, 72 sec, at 1420.4556 MHz, New View! Aug 1977, UFO Sighting News.
 
02:59
Lets crack this alien signal! The Wow! signal was a strong narrowband radio signal detected by Jerry R. Ehman on August 15, 1977, while he was working on a SETI project at the Big Ear radio telescope of The Ohio State University, then located at Ohio Wesleyan University's Perkins Observatory in Delaware, Ohio.[1] The signal bore the expected hallmarks of non-terrestrial and non-Solar System origin. It lasted for the full 72-second window that Big Ear was able to observe it, but has not been detected again.
Views: 1341460 Scott Waring
7078 Khz Strange Radio Signals
 
04:56
Strange radio signals received on 7.078 Mhz on LSB. Can anyone identify this signal?
Views: 4505 Edmk2009
Transmit Radio Signals w/ Raspberry Pi (1/2) - Software Defined Radio Series #24
 
17:01
In this video I show how to transmit radio signals with a Raspberry Pi! This video includes the complete steps from the beginning, where we format and reinstall the operating system (Raspbian), enable SSH access, upload audio files, install the necessary programs, and how to use them. NOTE: The Raspberry Pi produces a lot of harmonics, which is generally very bad in terms of RF tranmissions, as "duplicates" of the original signal will be seen at Frequency*2, Frequency*3, Frequency*4, etc. Hardware: - Raspberry Pi v3 Model B - Transmitter - Terratec E4000 RTL-SDR (RTL2832U) - Receiver Topics covered: - Formatting SD Cards Properly - Installing Raspbian - Enabling SSH (Now disabled by default since 30th November 2016!) -- https://www.raspberrypi.org/blog/a-security-update-for-raspbian-pixel/ - Uploading Files With FileZilla - Installing PiFmRds - Basic PiFmRds Usage Tools: - SD Formatter v4 https://www.sdcard.org/downloads/formatter_4/index.html - FileZilla https://filezilla-project.org/ - PiFmRds https://github.com/ChristopheJacquet/PiFmRds - SDR# (sdrsharp, http://airspy.com/download/ & https://github.com/jmichelp/sdrsharp-bladerf) - RPi TX https://github.com/F5OEO/rpitx -- https://github.com/F5OEO/rpitx/issues/21 -- https://github.com/F5OEO/rpitx/issues/25 Stay tuned and subscribe for more upcoming videos showing actual hacks! Many thanks to Adafruit for linking to this video! (https://blog.adafruit.com/2017/02/10/transmit-radio-signals-w-raspberry-pi/) Many thanks to the RTL-SDR.com Blog for featuring this video! ( http://www.rtl-sdr.com/video-tutorial-transmitting-signals-raspberry-pi/ ) Twitter: @CrazyDaneHacker Facebook: https://www.facebook.com/crazydanishhacker Patreon: https://www.patreon.com/crazydanishhacker
Views: 10828 Crazy Danish Hacker
Why AM Radio Signals Propogate Farther At Night Than During the Day
 
04:01
→Subscribe for new videos every day! https://www.youtube.com/user/TodayIFoundOut?sub_confirmation=1 →How "Dick" came to be short for 'Richard': https://youtu.be/BH1NAwwKtcg?list=PLR0XuDegDqP2Acy6g9Ta7hzC0Rr3RDS6q Never run out of things to say at the water cooler with TodayIFoundOut! Brand new videos 7 days a week! More from TodayIFoundOut In this video: In this video, we're looking at why it is that some radio signals, like am radio, propagate much farther at night than during the day, allowing you to potentially pick up an am radio station sometimes even thousands of miles away from the broadcast source. Want the text version?: http://www.todayifoundout.com/index.php/2015/01/radio-signals-travel-night-day/ Sources: http://electronics.howstuffworks.com/radio4.htm http://electronics.howstuffworks.com/question1.htm http://en.wikipedia.org/wiki/Ionosphere http://en.wikipedia.org/wiki/AM_broadcasting http://www.fcc.gov/encyclopedia/why-am-radio-stations-must-reduce-power-change-operations-or-cease-broadcasting-night http://usatoday30.usatoday.com/news/science/wonderquest/2002-01-23-radio-waves.htm http://illumin.usc.edu/114/catch-a-wave-radio-waves-and-how-they-work/ http://www.cybercollege.com/frtv/frtv017.htm http://en.wikipedia.org/wiki/Skywave http://commons.wikimedia.org/wiki/File:Skywave_Effect_of_AM.png http://missionscience.nasa.gov/ems/03_behaviors.html Image Credit: https://commons.wikimedia.org/wiki/File:Skywave_Effect_of_AM.png http://apollo.lsc.vsc.edu/classes/met130/notes/chapter1/ion2.html http://radiojove.gsfc.nasa.gov/education/educ/radio/tran-rec/exerc/iono.htm https://en.wikipedia.org/wiki/File:Skywave.jpg https://commons.wikimedia.org/wiki/File:Amfm3-en-de.gif
Views: 16948 Today I Found Out
How to Make AM Radio Transmitter
 
08:43
How to make an AM radio transmitter for use with a crystal radio or a normal AM radio. This simple circuit uses an oscillator chip and a transformer to take input from a sound source and turn it into radio waves, transmitted using an antenna. I test it with a CD player as the sound source but it may also work with an iPod or iPhone, though it may need some amplification for that. WARNING: Do not transmit more than 1 or 2 meters/yards otherwise you'll interfere with other radios. In many countries it is illegal to transmit without a license. For how to make the homemade crystal radio, watch "How to Make/Build a Crystal Radio": http://youtu.be/VqdcU9ULAlA For how to make the crystal earpiece watch "Make Crystal Earphone/Earpiece for Crystal Radio - Homemade": http://youtu.be/OVapqz4yBCY For how to make a lifter or ionocraft, watch "How to Make a Lifter": http://youtu.be/vzZy1Aqleno My webpage about how to make a simple AM radio transmitter: http://rimstar.org/science_electronics_projects/make_simple_am_radio_transmitter.htm Where to get a 1 megahertz oscillator chip and an audio transformer: https://www.scitoyscatalog.com/category/R.html Follow behind-the-scenes on: Twitter https://twitter.com/#!/RimStarz Google+ https://plus.google.com/116395125136223897621 http://rimstar.org Music used for background: The Path of the Goblin King Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/ ISRC: USUAN1100873
Views: 266179 RimstarOrg
Using a PC sound card to receive VLF radio signals
 
13:25
Just connect an antenna to your computer's microphone input, and you can receive VLF (Very Low Frequency) radio signals! A sound card (or built-in sound chip) with a recording sampling rate of at least 96 kHz is recommended. Example of using this method to receive VLF signals from Russia and Europe: http://www.youtube.com/watch?v=fKSOoZ2vhvo SDR Sharp software (for Windows) to receive and record VLF (and many other) radio signals: http://sdrsharp.com/#download Similar SDR (Software Defined Radio) applications are available for Linux and Mac OS. Lists of VLF stations: http://sidstation.loudet.org/stations-list-en.xhtml http://www.smeter.net/stations/vlf-stations.php Common sources of radio interference and recommended solutions: http://www.ccrane.com/!wcjHVrOwu6BDBDjo39xwNw!/AM-Antennas About the accidental recording of VLF station GBR (16 kHz) contained on Mike Oldfield's "Tubular Bells" album: http://alancordwell.co.uk/personal/index.php http://gkircher.stormloader.com/vlfcd/ http://en.wikipedia.org/wiki/Rugby_Radio_Station
Views: 86660 VWestlife
GCSE Physics Revision: Communication with waves
 
03:55
GCSE Physics Revision: Communication with waves You can watch all my videos at www.freesciencelessons.co.uk In this video, we look at how we use waves for communication. We explore how radio waves can be used for radio signals and for terrestrial TV. We then explore how microwaves can be used for mobile telephones and satellite TV and finally we take a look at infra-red and visible light.
Views: 55531 Freesciencelessons
PROPAGATION OF ELECTROMAGNETIC WAVES _ PART 02
 
03:48
For more information: http://www.7activestudio.com [email protected] http://www.7activemedical.com/ [email protected] http://www.sciencetuts.com/ [email protected] Contact: +91- 9700061777, 040-64501777 / 65864777 7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use. Sky waves:In the frequency range from a few MHz up to 30 to 40 MHz, long distance communication can be achieved by ionospheric reflection of radio waves back towards the earth. This mode of propagation is called sky wave propagation and is used by short wave broadcast services. The ionosphere is so called because of the presence of a large number of ions or charged particles. It extends from a height of ~65 Km to about 400 Km above the earth’s surface. Ionisation occurs due to the absorption of the ultraviolet and other high-energy radiation coming from the sun by air molecules. The ionosphere is further subdivided into several layers, the details of which are given in Table. The degree of ionisation varies with the height. The density of atmosphere decreases with height. At great heights the solar radiation is intense but there are few molecules to be ionised. Close to the earth, even though the molecular concentration is very high, the radiation intensity is low so that the ionisation is again low. However, at some intermediate heights, there occurs a peak of ionisation density. The ionospheric layer acts as a reflector for a certain range of frequencies 3 to 30 MHz.Electromagnetic waves of frequencies higher than 30 MHz penetrate the ionosphere and escape. These phenomena are shown in the Figure. The phenomenon of bending of EM waves so that they are diverted towards the earth is similar to total internal reflection in optics. Space wave: Another mode of radio wave propagation is by space waves. A space wave travels in a straight line from transmitting antenna to the receiving antenna. Space waves are used for line-of-sight LOS communication as well as satellite communication. At frequencies above 40 MHz, communication is essentially limited to line-of-sight paths. At these frequencies, the antennas are relatively smaller and can be placed at heights of many wavelengths above the ground. Because of line-of-sight nature of propagation, direct waves get blocked at some point by the curvature of the earth as illustrated in Figure. If the signal is to be received beyond the horizon then the receiving antenna must be high enough to intercept the line-of-sight waves.If the transmitting antenna is at a height hT, then you can show that the distance to the to the horizon dT is give where R is the radius of the earth approximately 6400 km.
Views: 104065 7activestudio
How Does An Antenna Work? | weBoost
 
04:33
*** It is with sadness that we share that Don, the person featured in this video, passed away in December 2017. Don was a Navy veteran and a valued member of our product engineering team since 2004. He will be greatly missed. Have you ever asked: How does an antenna work anyway? If you have, then you will want to watch this 4-minute video. We ask a guy who designs and tests antennas, Don with weBoost, how antennas work. In the video he explains how an antenna works and why. So whether you're just curious and want an answer to 'how do antennas work.' Or if you want a little background before shopping for the best antenna for your needs, this short video explanation by Don the Antenna Engineer is a good place to start. To learn more about signal boosters visit: https://www.weboost.com/us/ Subscribe to our channel to be in the know when we release our weekly videos. Including Tips, how-to and more. Read more on our blog: https://www.weboost.com/us/news/blog/how-does-an-antenna-work/
Views: 616541 weBoost
Astronomers detect radio signals from far away galaxy
 
03:21
Thirteen radio bursts received from deep space; Fox News Headlines 24/7's Brett Larson weighs in on 'Tucker Carlson Tonight.' #Tucker #FoxNews FOX News Channel (FNC) is a 24-hour all-encompassing news service dedicated to delivering breaking news as well as political and business news. The number one network in cable, FNC has been the most watched television news channel for more than 16 years and according to a Suffolk University/USA Today poll, is the most trusted television news source in the country. Owned by 21st Century Fox, FNC is available in more than 90 million homes and dominates the cable news landscape, routinely notching the top ten programs in the genre. Subscribe to Fox News! https://bit.ly/2vBUvAS Watch more Fox News Video: http://video.foxnews.com Watch Fox News Channel Live: http://www.foxnewsgo.com/ Watch full episodes of your favorite shows The Five: http://video.foxnews.com/playlist/longform-the-five/ Special Report with Bret Baier: http://video.foxnews.com/playlist/longform-special-report/ The Story with Martha Maccallum: http://video.foxnews.com/playlist/longform-the-story-with-martha-maccallum/ Tucker Carlson Tonight http://video.foxnews.com/playlist/longform-tucker-carlson-tonight/ Hannity http://video.foxnews.com/playlist/longform-hannity/ The Ingraham Angle: http://video.foxnews.com/playlist/longform-the-ingraham-angle/ Fox News @ Night: http://video.foxnews.com/playlist/longform-fox-news-night/ Follow Fox News on Facebook: https://www.facebook.com/FoxNews/ Follow Fox News on Twitter: https://twitter.com/FoxNews/ Follow Fox News on Instagram: https://www.instagram.com/foxnews/
Views: 464026 Fox News
Transmit Radio Signals w/ Raspberry Pi (2/2) - Software Defined Radio Series #25
 
21:06
In this video I demonstrate how rpitx can be used with a Raspberry Pi to transmit various other radio signals, and not just wideband FM. NOTE: The Raspberry Pi produces a lot of harmonics, which is generally very bad in terms of RF transmissions, as "duplicates" of the original signal will be seen at Frequency*2, Frequency*3, Frequency*4, etc. Hardware: - Raspberry Pi v3 Model B - Transmitter - Terratec E4000 RTL-SDR (RTL2832U) - Receiver Topics covered: - RPiTX Installation and Usage - Common Issues Tools: - SDR# (sdrsharp, http://airspy.com/download/ & https://github.com/jmichelp/sdrsharp-bladerf) - RPi TX https://github.com/F5OEO/rpitx -- https://github.com/F5OEO/rpitx/issues/21 -- https://github.com/F5OEO/rpitx/issues/25 Stay tuned and subscribe for more upcoming videos showing actual hacks! Many thanks to the RTL-SDR.com Blog for featuring this video! ( http://www.rtl-sdr.com/video-tutorial-transmitting-signals-raspberry-pi/ ) Twitter: @CrazyDaneHacker Facebook: https://www.facebook.com/crazydanishhacker Patreon: https://www.patreon.com/crazydanishhacker
Views: 4594 Crazy Danish Hacker
Portal 1: all radios and signals from Transmission Received
 
05:46
The location of every single radio and signal, in a compact and handy video, to help you with the achievement. It starts counting at 0 instead of 1, sorry about that.
Repeating radio signals coming from space (CNET News)
 
01:31
Read the CNET News article - http://cnet.co/2wlYnnE Sign of life? Scientists discover an intriguing fast radio burst in a distant galaxy. Subscribe to CNET: http://cnet.co/2heRhep Check out our playlists: http://cnet.co/2g8kcf4 Like us on Facebook: https://www.facebook.com/cnet Follow us on Twitter: https://www.twitter.com/cnet Follow us on Instagram: http://bit.ly/2icCYYm Add us on Snapchat: http://cnet.co/2h4uoK3
Views: 49412 CNET
Repeating radio signals coming from deep space
 
03:23
..have been detected by astronomers. This is very interesting find. Could aliens be trying to communicate from a far off world? Download this file and original files here https://www.reddit.com/r/Futurology/comments/6xzutf/repeating_radio_signals_coming_from_deep_space/ Credit for Files - Harvard and Reddit User maxcresswellturner UFO Hunting Clouds Videos on Amazon - https://amzn.com/B01LC04PIY http://ufosightingz.blogspot.com - For more UFO Videos http://www.facebook.com/ufosightingz - Like UFOs on Facebook http://www.facebook.com/thegrandwiener http://ufosightingz.blogspot.com/2013/01/alien-encounter-january-6-2012.html - UFO Story Music by UFO Hunting Clouds YouTube Channel https://twitter.com/UFO_Videos_Blog - Follow on twitter
Views: 7331 UFO Hunting Clouds
Decoding Morse Code transmission from live radio broadcast
 
02:35
WATCHING IN HD HIGHLY RECOMMENDED ! Today I've stumbled on the web page which allows to listen to live radio transmissions in a wide spectrum range (no additional hardware needed on the client side). Among many kinds of strange signals, there are some german music radiostations and plenty of morse code transmissions. Not so long time ago I saw a movie where someone attempted to decode Morse Code signals hidden in "Portal" game. I've tried the same here and it worked! It's quite difficult to get clear transcription (as the signal mostly doesn't have good quality), but it's possible. update: on this site you can find many online receivers located around the globe: www.websdr.org
Views: 37699 0bo0
What is RADIO FREQUENCY? What does RADIO FREQUENCY mean? RADIO FREQUENCY meaning & explanation
 
08:30
✪✪✪✪✪ WORK FROM HOME! Looking for WORKERS for simple Internet data entry JOBS. $15-20 per hour. SIGN UP here - http://jobs.theaudiopedia.com ✪✪✪✪✪ What is RADIO FREQUENCY? What does RADIO FREQUENCY mean? RADIO FREQUENCY meaning - RADIO FREQUENCY definition - RADIO FREQUENCY explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Radio frequency (RF) is any of the electromagnetic wave frequencies that lie in the range extending from around 3 kHz to 300 GHz, which include those frequencies used for communications or radar signals. RF usually refers to electrical rather than mechanical oscillations. However, mechanical RF systems do exist (see mechanical filter and RF MEMS). Although radio frequency is a rate of oscillation, the term "radio frequency" or its abbreviation "RF" are used as a synonym for radio – i.e., to describe the use of wireless communication, as opposed to communication via electric wires. Electric currents that oscillate at radio frequencies have special properties not shared by direct current or alternating current of lower frequencies. The energy in an RF current can radiate off a conductor into space as electromagnetic waves (radio waves); this is the basis of radio technology. RF current does not penetrate deeply into electrical conductors but tends to flow along their surfaces; this is known as the skin effect. RF currents applied to the body often do not cause the painful sensation of electric shock as do lower frequency currents. This is because the current changes direction too quickly to trigger depolarization of nerve membranes. However they can cause superficial but serious burns called RF burns. RF current can easily ionize air, creating a conductive path through it. This property is exploited by "high frequency" units used in electric arc welding, which use currents at higher frequencies than power distribution uses. Another property is the ability to appear to flow through paths that contain insulating material, like the dielectric insulator of a capacitor. This is because capacitive reactance in a circuit decreases with frequency. In contrast, RF current can be blocked by a coil of wire, or even a single turn or bend in a wire. This is because the inductive reactance of a circuit increases with frequency. When conducted by an ordinary electric cable, RF current has a tendency to reflect from discontinuities in the cable such as connectors and travel back down the cable toward the source, causing a condition called standing waves. Therefore, RF current must be carried by specialized types of cable called transmission line. To receive radio signals an antenna must be used. However, since the antenna will pick up thousands of radio signals at a time, a radio tuner is necessary to tune into a particular frequency (or frequency range). This is typically done via a resonator – in its simplest form, a circuit with a capacitor and an inductor form a tuned circuit. The resonator amplifies oscillations within a particular frequency band, while reducing oscillations at other frequencies outside the band. Another method to isolate a particular radio frequency is by oversampling (which gets a wide range of frequencies) and picking out the frequencies of interest, as done in software defined radio. The distance over which radio communications is useful depends significantly on things other than wavelength, such as transmitter power, receiver quality, type, size, and height of antenna, mode of transmission, noise, and interfering signals. Ground waves, tropospheric scatter and skywaves can all achieve greater ranges than line-of-sight propagation. The study of radio propagation allows estimates of useful range to be made. Radio frequency (RF) energy, in the form of radiating waves or electrical currents, has been used in medical treatments for over 75 years, generally for minimally invasive surgeries using radiofrequency ablation including the treatment of sleep apnea. Magnetic resonance imaging (MRI) uses radio frequency waves to generate images of the human body.
Views: 18962 The Audiopedia
How Radio Signals Are Transmitted And Received?
 
00:45
Transmitter and receiver antennas are often very similar in design 26 may 2017 radio means sending energy with waves. Wikipedia wiki radio_receiver url? Q webcache. Note antennas are used both to transmit or and 'radio waves' music, conversations, pictures data invisibly through the air, often over millions of miles it happens every day in thousands 11 aug 2010. Amplification the power of radio waves picked up by a receiving antenna decreases with square its distance from transmitting. Electromagnetic waves the radio & tv umd physics. In transmission, a radio transmitter supplies an electric current oscillating at frequency (i. This can be done in many ways using microwaves or radio waves through the earth's before a sound piece of information is transmitted, it encoded 5 dec 2013 transmitting modulated rf carrier (radio frequency) are amplified and sent to antenna that sends 28 may 2015 just how data received across wireless networks? The network infrastructure needed transmit. Radio waves transmission of radio microphone, current modulating a sound wave carrier, signal challenge transmit and receive openlearn open unit 6? Transmitting receiving devices arrlcommotion wireless. Googleusercontent search. In other words, it's a method of transmitting electrical energy from one place to another without using these waves that are propagated carry signals received by antennae on your radio or television set. A microphone is a device for converting sound energy into if dozen stations all transmitted sounds by the mechanism described above, your radio then decodes signal it has received subtracting carrier 18 sep 2006 science behind transmitting and receiving signals, part of bbc ou's programme website rough 2 heart station transmitter. 3) when the waves arrive at the receiver antenna, they make electrons vibrate inside it. How do antennas and transmitters work? Explain that stuffhow it works radio wave basicshow waves are produced youtube. Electromagnetic radiation is transmitted in waves or particles at different coil transmitter were picked up by the receiving antenna, sparks would jump its gap as well radio wave transmission there are two principal ways which electromagnetic (radio) energy travels from a transmitting antenna to fluctuations called 'radio waves' electric charges sloshing down how generated, and received ? . High frequency ac) to the antenna's terminals, and antenna radiates energy from current as electromagnetic waves (radio waves) 5 mar 2017 2) radio travel through air at speed of light. The process of sending and receiving radio signals through wireless networks involves two devices, the transmitter receiver 6 apr 2015 waves are a type electromagnetic radiation. This produces an electric current that recreates the original signal. Even with it is usually used a radio transmitter or receiver. Block radio waves scientific american. It is a device that will transmit radio signals out over the air. Radio wikipediaradio wikipedia. These
Views: 1585 Aile Aile
Physics 10th Unit-17 Lecture-5 Transmission of Radio Waves Through Space
 
13:58
Lecture: Transmission of Radio Waves Through Space Topics Covered: Fax Machine Cell Phone Photo phone Chapter 17 Information and Communication Technology Language: Urdu/Hindi Blog - http://schools.akblogs.com/ Facebook Page - http://fb.me/aks316 Project of http://www.akblogs.com/ Book: Physics 10th Punjab Text Book Board, Sindh Text Book Board, Khyber Pakhtunkhwa Text Book Board, Federal Government Text Book Board Ali Khan Schools - Educational Consultant is an educational blog where we share videos for students of Matric (9th and 10th) and F.Sc Pre-engineering (Part I and II) class for preparations of their Board examinations. We are providing these video lectures free of cost which will not only save your tuition fee but also help you preventing from buying reference book. So just follow our channel on Youtube: https://www.youtube.com/user/MuhammadAli316N/ Ali Khan Schools Educational Consultant and Tutor
Mysterious Russian radio transmission...
 
02:59
A Russian radio station has played a buzzing sound on frequency 4625 kHz for four decades. Every few months it is interrupted by a voice relaying a coded message, but no one knows the exact purpose of the station or the message. A Russian radio station has played a buzzing sound on frequency 4625 kHz for four decades. Every few months it is interrupted by a voice relaying a coded message, but no one knows the exact purpose of the station or the message. A Russian radio station has played a buzzing sound on frequency 4625 kHz for four decades. Every few months it is interrupted by a voice relaying a coded message, but no one knows the exact purpose of the station or the message. Mysterious Russian radio transmission... Mysterious Russian radio transmission... Mysterious Russian radio transmission...
Views: 17955 JacahersPaocam
Researchers discover 6 bursts of radio waves 3 billion lightyears away. Aliens?
 
01:55
Researchers say six new bursts of radio waves have been detected 3 billion lightyears away. While the source of the energy remains unknown, some believe it could be a sign of aliens trying to communicate with Earth. RT America’s Marina Portnaya joins to discuss. Find RT America in your area: http://rt.com/where-to-watch/ Or watch us online: http://rt.com/on-air/rt-america-air/ Like us on Facebook http://www.facebook.com/RTAmerica Follow us on Twitter http://twitter.com/RT_America
Views: 12760 RT America
How AM and FM Works
 
13:21
Highly edited version of US Army training video (TF11-3482 - Frequency Modulation Part I: Basic Principles, 1964) on the basics of FM transmission. This also shows how AM works. For educational purposes for my students.
Views: 266531 Dana Lee