How do Radios Work?

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In the modern era, radio waves control everything. From the tunes in your car driving down the road to the police radio in the car that's pulling you over for not signaling your turn. These waves are undetectable and invisible to human senses but they make up the foundation of modern technology.
While the root of modern connected technologies may be radio waves, the underlying tech that makes radios possible is a rather simple concept to understand. Any person can make a simple radio in their home for a few bucks, which is part of the reason this foundational tech dates back to 1895.
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Music:
Dark Fog by Kevin MacLeod is licensed under a Creative Commons Attribution license (creativecommons.org/licenses/...)
Source: incompetech.com/music/royalty-...
Artist: incompetech.com/

[@jessicamessica2271]

"all you need to build your own radio is a battery a penny and .... a radio"

[@ConcerningReality]

Technically you only need a radio to listen

[@ConcerningReality]

@Imight Realperson It's called learning and demonstration 🤗

[@Glenn-in-ATL]

He clearly said the battery and coin was a radio "transmitter". With the actual radio as a radio "reciever.

[@user-em9mw9ch3y]

lol

[@richmellow3315]

I have a, "Sixty and One" Electronic Lab, From Hobby Lobby, I got it for my Birthday when I was twelve. "You can make Everything from a Burglar/Rain Alarm, Radio Station, to a AM "Powerless/Batterieless Radio receiver." It gets its energy soule from the Radio Waves floating in the air.📡📻🗼 Just like Tesla free Energy. You just need a big ANT or House Ground Wire to catch the signal, but it works. No batteries or power needed! kzbin.info/www/bejne/r4bEqWaggJySmck

[@BazamO]

I'm so smart that I didn't even crack the morse code and I went to the comments to check what it was. Get on my level NERDS

[@ConcerningReality]

Now that’s big brain 🧠

[@hazmat8547]

Me small brain

[@razorblade6746]

HAHA like that idea. I saw the message and immediately uncovered it. Thanks to memory XD

[@YotamPeleg]

Small pp big brain

[@lefconikiatisg1]

I can finally use my Morse code skills: "I'm concerned" And it was a bit harder than I thought it would be because there were no spaces between the words

[@gawrguraenthusiast5675]

so the message is "im concerned" or

[@pierrickbramberger4206]

Its like looking up the solution to the riddle. Dont wanna judge but i think solving it was more fun ;)

[@ignasvasiliauskas284]

pe

[@gawrguraenthusiast5675]

@@aidankintz9285 bruh

[@aidankintz9285]

@@gawrguraenthusiast5675 oh wait I commented on the wrong thing

[@grantmccollum4499]

.. -- -.-. --- -. -.-. . .-. -. . -.. (I'm concerned) That was a cool way to end the video. My Morse code skills are rusty since I haven't used them in years when i used to be an amateur radio operator. Glad to know I can still decipher Morse LOL :-)

[@ConcerningReality]

Good job!😉

[@itsr4yd946]

-.-

[@amandadykes6649]

"I'm concerned" Thank you for a fun homeschool lesson! This was a great explanation, and my kids 12, 10, 8, and 6 really enjoyed the decoding!

[@imthedragonlord]

I never could comprehend how when Morse code was used people could tell the difference in where spaces are and when it loops

[@ConcerningReality]

It definitely takes a trained listener

[@1432CW]

Morse code is still used. Those with a short-wave radio can easily demonstrate this to themselves. It is very easy to hear most weekends, when contests are in full swing.

[@RoarStaze]

That’s cuz we are Gods AI and he made us in his image and Humans AI recognizes patterns too because we our making them in our image 😂

[@JohnJesus]

...comerescuemeiamindangerpleasecomerescuemeiamindangerpleasecomerescueme...

[@freshfruit8960]

Skill issue😂

[@RameezLalloo]

that morse code translates roughly to "all hail supreme leader Kim jong un"

[@smoothbeak]

Are you sure? I got "Make America Great Again"? ;)

[@numberstationarchive3082]

in the Pyongyang dialect, his name is actualy Kim Tsong Eun,

[@ronanmcconnell6788]

Number Station Archive that’s a fact I could live without

[@YouTubeSupportTeams]

lmao

[@mikegalvin361]

Being a famer I have an electric fence and you could hear the ticking on my medium wave radio and much louder tick on my long wave band, it does not affect FM wave at all.

[@tylerdean980]

This is because the spark creates a rough amplitude spike, an fm reciever is deaf to a spike in amplitude

[@Rod-bp8ow]

That's good mike, the frequency does not have any chance of getting inside the farm. Helpless radio frequency.

[@spoopyscaryskelebones3846]

@@Rod-bp8ow aww poor radio :’)

[@minecraftgamer6283]

It was really helpful. I cnnot describe my felling when i finally understood the radio's working method. Just hats off for understandable description. 😊

[@geofferyromany4634]

Nice video. It answered my basic questions about radio waves. Thx

[@johnreilly1179]

I really liked this! Thanks for taking the time to make !

[@Alexthebrokkie]

Thank a lot man, you probably worked a lot to get to this professional video .

[@jhunmichaelibanez2362]

Wow I actually understood the morse code. Training was worth it “Im concerned”!!

[@mr.challenge8157]

You forgot to talk about the filters, without filters you will hear all the channels at the same time, to avoid that you must use a band pass filter

[@ignyus1sinaloa]

Didn't they say supm bout resonance?

[@unholyalchemist362]

Wonderful information and video! Well done ^-^

[@Julius-fd2sd]

Wonderful explanation!!!

[@chase_modugno]

Awesome video. Although, I'm still a little confused on how audio (or any media type) doesn't get distorted when "packaged" inside different sine wave lengths.

[@bedbugproductions3245]

“comment I’m concerned below to prove your Morse code skills is what”the message said at the end

[@debsman18]

That’s because it does

[@codyskeie5971]

I’m a beginner in this field but here’s my understanding. The radio transmitting your voice will take a certain amount of measurements as you talk. The number can depend on the type of modulation, encoding scheme ,and frequency. You can hear a dramatic change in quality as the frequency gets lower because there just not as many waves to carry your information. If you wanted something crystal clear you would need to use TCP, look up osi layer 4. To answer your question, the sine wave is technically the information. The sine wave is being interrupted to mean either a zero or one, nrz is something to look up that will help you understand. Even as the frequency changes the sine wave is still a wave that can be interpreted. Sorry for the rant drunk scrolling KZbin but if you have more questions I’m here

[@prometheus8457]

it is purposefully distorted in a way we can control into a format better suited for transmitting and receiving. the "distortion" is actually the encoding. when the package is received, decoding then happens and you get the original, undistorted data. also the quality of that data depends on things like noise and interference during transmission. you can think of human readable data being converted into 1s and 0s (based on an agreed/standard code between both ends) and then letting those binary values dictate the frequency or amplitudes of the transmitted waves. then those waves get turned back into 1s and 0s and then back into human readable data on the receiving end. with both ends using transducers and/or digitizers to achieve this.

[@divyangvaidya9675]

It isn't. It gets decoded and in that process is where audio can be distorted.

[@AlokKumar-ym8bl]

Excellent information 👌

[@actyon20]

Genius bro! Thank you from my heart!

[@ConcerningReality]

Of course!

[@user-jt4me1jj3b]

thank you it was a good explanation

[@avimehenwal]

Amazing amazing video. Thankyou soo so much

[@mario12359]

People also forget to put down that AM/FM portable radios are more reliable then electricity and internet if your cell phone don't work cause low battery or has no internet or electricity most of the modern ones can be powered by battery as well as solar power, crank, and most modern ones can charge phones act as light or even use a SOS beacon for getting attention .Good for on the go or tight situations and good way to get information quickly no matter where you are located and easier to operate. With so many different devices it makes it super easy to receive information and communication no matter where you are at and no matter what circumstance. Not only it paved way for information age but it also can save lives such as u know a pandemic ya see here.

[@ELBI_Ian]

IM CONCERNED It's fun to learn the basics first before I get licensed.

[@codiegames351]

Radio is amazing, I'm a little "concerned" how powerful it is.

[@peoplefan1868]

Awesome video

[@allistarcenter3]

The best video, Thank you so much!

[@D3vious38]

Me: Explain it to me like I'm 9. (Watches video) Me: Okay now explain that to me like I'm 5.

[@billbixby557]

"A metal stick?" Now i've heard it all. Super great video sans the metal stick comment. 👍

[@axelblaze7492]

Please do a video on explaining radio frequency channels in detail

[@StringerNews1]

Oh my no, phones do *not* use frequency modulation! The 800 MHz band is also no longer available for phones, as the old analog AMPS band was swapped with the SMR band a while ago, and that ill-advised swap killed both 800 and 850 MHz bands. There's _some_ LTE action on the 850 MHz band, but not like there is on the new 700 MHz band that has no such baggage. Most phones use 1900 MHz and above as their primary frequencies, using sophisticated digital modulation schemes that are proprietary and varied.

[@sqidybilly]

watching that part with the glitch effect and the beeping morse code is actually kinda creepy if your watching this at 2 in the morning, but great video, loved it

[@Collins01]

watching at 2:01 am

[@sqidybilly]

@@Collins01 💀

[@theoryandapplication7197]

thank for sharing dear

[@wolfdreamer9]

Thank you for this video :)

[@wilhelmburger1974]

I'm concerned ....that i didnt have morse code skills before this video #you did more than educate me on radios 😂😂

[@justaguy4real]

Incredible how fast radio waves travel instantly nearly at speed of light. Amazing drones can be real time flown in other side of planet. And that computer processes can computer all of that so fast as well. How do the processers computer so fast, AND how are they made or constructed to do so?

[@thejummyjum6207]

I’m no expert, but its just how fast electricity travels, which is close to the speed of light, making the computations instant. How it’s made is another story, and requires millions of small parts the size of cells that all fit together to process electricity.

[@FAB1150]

No radio waves ARE light! It's the same thing! That's why it travels at the speed of light 😄

[@michaelgaeta3151]

@@FAB1150 kind of..but not necessarily the same thing..light is visible a form of rf and interacts differently than other forms of rf like infrared,microwaves depending on conditions..I think 🤔..

[@FAB1150]

@@michaelgaeta3151 no, it is exactly the same thing! At different frequencies they behave differently (for example, you can't see it anymore) because the amount of energy it stores changes, and at some point (for example x-rays), the waves become so small that they zip right through less dense objects, like your flesh.

[@EneaG]

@@michaelgaeta3151 nope, you're thinking of the visible part of the light spectrum

[@mohammedsaj8372]

It's Really nice thank you

[@Tacsmoker]

and they just sussed how to send electricity through wifi bit like nikkoli teslas invention but better cant wait to see how that pans out, cheers great vid again mate

[@GogiRegion]

I feel like he would be proud. We technically use his idea of electromagnetic powering of devices with smart watches and such. And while he’d be disappointed that we don’t use it for long range electrical transfer, I bet he’d be impressed with how much info we get from it just by using so many different frequencies to transmit on different channels and then have high speed encoders and decoders to transmit large amounts of info using electricity faster than he ever could have imagined.

[@erinlucassen]

Good video!

[@justinramirez8228]

That was fun to decipher. After reading it like 2 times I feel like I got it down.

[@neoness1268]

Very clearly explained.

[@queenvickyv]

Just wondering how you made this video - which software/program ? Good stuff!

[@ConcerningReality]

Thanks! I use Adobe Premiere Pro. You could also use after effects, but it isn’t necessary.

[@queenvickyv]

@@ConcerningReality Thanks so much for the quick reply and for sharing your film !

[@SupersonicSpinach]

A well spent 9 minutes and 40 seconds!

[@rowlandramos4188]

I love how you changed the radio name to "sowy" 😂

[@goldibollocks]

Wait, if you need frequency to distinguish one radio station from the next, how can they modulate frequency to transmit information? If I tune my radio to one frequency and the station modulates its frequency constantly to transmit information, wouldn't it constantly fall in and out of the frequency I tuned my radio to? Or do I tune my radio to a RANGE of frequencies and the modulation stays within that range?

[@Tankwiper]

Little late with the answer, but yes -- the modulation stays in a range.

[@bagnome]

That range is also known as bandwidth. And that bandwidth (for FM in the US) is 200kHz, or 0.2MHz around a center frequency. So, if your radio is tuned to 100.5 MHz, then the range (bandwidth) is 100.4 MHz - 100.6 MHz. That's why FM station frequencies are always 99.7, 99.9, 100.1, 100.3, 100.5, etc.

[@goldibollocks]

@@bagnome Ah nice, that makes sense. I have noticed this phenomenon on old radios! Thanks!

[@nature.951]

Wow thanks for such a valuable video sir full respect to you from India 👍🏻🇮🇳🙏🫡

[@stnwrd]

So does the carrier wave frequency determine the radio stations frequency number?

[@alliswell0008]

Osam ...and realistic....today I made transmitted EM wave successfully .

[@Zephira58]

The morse code at the bottem directly translates to "COMMENTIMCONCERNEDBELOWTOPROVEYOURMORSECODESKILLS'

[@rhealbutler]

I SOLVED IT!!! Comment Im Concerned Below To Prove Your Morse Code Skills

[@ConcerningReality]

Good job!😏

[@EleanorMarieRose]

fab! i started working in radio in 2023 and started doing vids about my career!

[@gracenote5619]

Which signal is stronger and can travel further? FM Radio signal or Cellphone 3G/4G signal?

[@tonyluvsnoob]

Dude your so smart concerning reality

[@mustang8258]

4:50 the cookie is the best part....

[@oohbootiga7649]

I'm concerned. So I had to crack the code myself.

[@motownrick3203]

I though the morse code would say something along the lines of 'please like and subscribe' but alas I was wrong lol 😁😸 Very interesting video nonetheless

[@ConcerningReality]

HA, my Morse code video does that 😅

[@nicktohzyu]

"these excited electrons travel through the air" WHAT THE FUCK

[@lilpogchamp4904]

Didn't used to appreciate this topics In elementary.

[@ArielPontes]

If different radio channels are only allowed to use a specific frequency, how is frequency modulation possible? If you change the frequency of your sine wave, shouldn't that interfere with other channels?

[@opssheesh]

you are basically given a range of frequencies you can use for one channel, this range is called the bandwidth, and FM varies only within this bandwidth.

[@yamanawrooz5132]

Do they used pulse modulation to transmit telegrams?

[@johnbhai7147]

How to make an ice-cream. Sugar, heavy cream, ice cream machine, and an small ice cream

[@Galo1908mg]

Thanks u so much for this vireo

[@mrben9000]

What happens when the wave is larger than the antenna?

[@ashleyarruda8722]

IM CONCERNED!

[@deeluve22]

Well, I knew S & O. I can't imagine I'll forget T, E & M. I'll need to work on the other 34 characters. lol

[@Robo-xk4jm]

hearing this background copyright free music gives flashbacks the many hours hearing it in some games, those of you who know, know lol

[@YatsukiNoSei]

I'm concerned that I still remember the morse code I learned in the scouts (?)

[@ibrahimadeoti-ui9ps]

But when you are tapping the coin on the battery and the radio has turned the signal to audio do you just speak and the you will hear your voice from the radio

[@mikey10006]

How does FM work like is it varied slightly from 680khz?

[@Brainrotteruwu]

So HZ is essentially fps for sound?

[@juliansantos1900]

Uhm so I do know that radio is resonating on its own frequency but what about the phase difference like is 500 hrtz start first on some pico second pls explain more. The thing I don't understand is how do radio able to ignore all frequency and able to collect that frequency even they has different phase

[@farwatariq1445]

the morse code says: "COMMENT I AM CONCERNED BELOW TO PROVE YOUR MORSE CODE SKILLS"

[@allisongregory2932]

I’m concerned.

[@user-sk6xt6zt9p]

Why was bro concerned 2 years ago

[@demn8042]

Whats the morse at end?

[@sadiyancenavarra8041]

I'm concerned with the fact that this video encourages children to mess with electrical gadgets without warning them of the risk. JK. I loved this video. It was really helpful. :)

[@nate8867]

There are no risks from a 9v battery

[@tonywright8294]

Unless you swallow it 😂

[@dilipdas5777]

Phase modulation left the chat

[@awenmckee4995]

"You're exciting electrons on the transmitter side. . . which is received as a signal. . ." Not exactly. Electrons aren't flowing between the transmitter and the receiver. Electromagnetic waves are. Electrons are only flowing through the metal conductors and metalloid semiconductors of the transmitter and receiver,.

[@Whityfisks]

Whatever m8

[@nathanbombardo]

@@Whityfisks hes right tho

[@Whityfisks]

@@nathanbombardo I now know that.

[@giovanniblythe3944]

What happens to the electrical signal as it reaches the radio wave? Does it generates a high frequency electrical signals and low voltage or maybe I'm mistaken?

[@nathanbombardo]

This video is kind of wrong. Electrical signals are not traveled through the air, electromagnetic signals are. Which is electrical and magnetic feild 90 degrees from each other through a space.

[@gonsonandenschinder]

So basically we "translate" the soundwaves into radiowaves which can travel much larger distances, some device can receive these radiowaves and translates them back into the soundwaves we can hear? But what I dont understand, how exactly is the radiowave changed so that it has the information of our sounds? I mean if the frequency isnt changed, what is? I thought sounds are just "ups and downs" so how can you translate these ups and downs into radiowaves without making the radiowave going "up and down" (keeping the frequency) Or did I get something completely wrong?

[@ericsolid]

Good job for my English lesrning, can you put subtitles in your future videos

[@ConcerningReality]

I’ll try! Sometimes the auto generated ones work well😊

[@CreeseDF]

yeah, im a native english speaker... but my ADHD makes it impossible for me to understand what's going on.

[@southaugusta8021]

I'm concerned nice ending! lol

[@rogerszeto8419]

As Tim Leary said, you can't advocate the telescope, you can't advocate the microscope. Love the show. Live the dream.

[@akhileshsingh9843]

Which static channel

[@spiralinguniverse8159]

So if you could send signals to all frequencies. So can you receive all signals at once ? A way to decode??? Cosmic background radiation ? The difference and their info in each layer of emf.

[@indianab1216]

Now you have me interested can you explain your theory more

[@calvinclark455]

I'm concerned. But definitely understand radio frequency and controls better now!

[@arcalter6075]

imconcerned yes, I do the bare minimum

[@sera-chan8194]

For everyone wondering and not wanting to do the work, the morse code at the end says: "Comment Im concerned below to prove your morsecode skills." I wish I could have just understand that instead of having to look up every letter in the international morse code chart xD

[@101ragdoll]

How they comprehended that shit going so fast

[@joyceyu2038]

7:34 diode or decoder?

[@Term-0]

'I'm concerned' you didn't go into pulse width modulation enough

[@noname-lc5pe]

Cause somebody stole my car radio and now i just sit in silence

[@JesusGomez-vk1ib]

How does a radio store information?

[@unums]

Goddamn it, now I can’t stop seeing sound with my video.

[@ramuparthasarathi2946]

I am not concerned as of now, as I don't know the Morse code. But I will be concerned, as I am interested to learn it.

[@doing-random1054]

Is it dangerous if I tried the coin, cell, radio experiment with a normal cell?

[@user-oh9cy7td4q]

THE HIGHER THE RADIO WAVE/HIGH FREQUENCY.. IT IS MORE HARMFUL TO HUMAN BODY..⚡🔥

[@alvenarjumawan2024]

Good day to everyone

[@WandaKiwi]

I'm concerned that it took me so many tries to decode it

[@DineshKumar-ix1im]

What are sine waves?

[@DerekFolan]

What can carrier signals do with brain waves ?

[@h7opolo]

influence moods and induce specific thoughts.

[@KRAFTWERK2K6]

You don't even need a coin and a 9 volt battery. Simply turning on a lightswitch, that is 1-2 meters away from the radio, already can be heard on a static station (the empty noise gap between radio stations).