arnomymous
590663
1144
23
#electronics #soldering
Sep 10, 2024 6:35 AM
arnomymous
590663
1144
23
#electronics #soldering
DocBeeblebrox
Neat!
YippeeKayakOB
Definitely expected rick roll
BradAz
Onlyhereforthelaughs
My PC mic wire is uninsulated, so if the mic isn't on, it picks up radio.
LerryV2
I made something similar to this where I was able to send an audio single over a laser. It only works light of sight and its mono, and its AM, BUT it works. Super easy circuit.
rbudrick
Aim any infrared remote at your smartphone's camera lens. You can see the infrared light as white light on screen.
threenotch23
So LEDs can be used as antennae ??
Astramancer
He said he had an antenna wired in to the LEDs, they were just flashing in time with the received signal. Unclear if they were being powered by the antenna or if he had some sort of amplifier circuit.
Type17
I read somewhere that hold music became a thing because a company’s telephone PBX was accidentally earthed to the transmission equipment of a radio station in the same building, and callers waiting on hold complemented the company on the idea of playing them music whilst they waited.
Artc0r3
One time we had this cool oldschool network party. Some Dude put out his 10yo unshielded Soundsystem and we all heard whispering voices the whole night. Took us at least 5h to understand he was just recieving an AM signal from a russian radio station with his PA😅
We were located in germany that time.
SaturnineCult
I remember panicking out hearing whispers all evening, turns out it was 70's guitar tube amplifier and wah pedal picking up russian radio.
BeachsideCoot
CyanideBreathMint
Had a bench tech job where I primarily tested video intercom systems for banks and such, at one point I accidentally shorted two pins on an IC, and a local Spanish station started playing on my testing rig.
BurnieCinders
It's a bit though:
Decoyape11
Something something diaodes…. Something something
seir
I was prepared for a Rick Rolling, was pleasantly surprised.
M4nFle5h
Was expecting a rickroll.
burntcustard
For remote control "detection" (like checking if the batteries are working) you can open up the camera app on your phone and point it at the remote while you're pressing buttons. The IR LED at the end of the remote is just outside of the visible spectrum but your phone will pick it up and display it within the visible spectrum on the screen
AK90
Instructions unclear, I have a WiFi/BT remote
Panpapes
I am an HVAC tech and use this all the time to verify the remotes for mini split units are working.
qhogan11337
Also used it for detecting IR inspection lights functioning when troubleshooting machine vision systems
WeaponizedJerk
So you're just not going to explain a damn thing? Missed opportunity to educate.
arnomymous
I'm just the finder of the clip
WeaponizedJerk
Well I wasn't directing this at you specifically. Apologies if it felt that way.
Darjanator
dafuq is an applifier?
ManOfKent1967
My old NHS analogue post aurals hearing aids used to do that when switched on "loop" mode. That's how I was able to tell if batteries on remote controls were running out by placing it right next to my aids and if I couldn't hear the "bip bip" sounds then it's dead.
ChewyTheWookie
Illuminating
Joylove
Refuse to watch any video with these ADHD subtitles. Waiting for the fad to die out.
ManOfKent1967
Speaking as a hard of hearing person, I need the subtitles but, yes, not The One Word At A Time format.
DreadPirateJaceMangrove
Is "I'm waiting for this fad to die out" the slogan of every generation before us?
InitHello
I have ADHD and I can't stand them. Practically unreadable.
ThatDarnLobster
I dont mind subtitles. I usually have my phone muted anyway.
PaperinoVB
It also runs Doom.
PaperinoVB
Jokes apart, very very cool :-)
Meranava
"Accidentally discovered interdimensional radio transmission through disco-dancing LEDs. Quantum physics meets groovy tech - who needs a professional antenna when you've got mood lighting?"
slidewhistlesymphony
Cool! But can it program my microwave?
arnomymous
if you try really really hard,... no
MediocreExtremist
it is older tech. would only do the VCR
arnomymous
microwavew where invented like 20 years before VCRs
MediocreExtremist
your technically right but are we talking programmable microwaves ?
hackller
ButteryBiscuitBass
I knew it, but I watched anyway. +1
NineByNine
...i'll be honest I was expecting that from the original vidceo and was... SOMEWHAT disappointed that it wasn't that. thank you for filling that hole in my life
hackller
no problem. glad to make your day!
erikleorga
Saw it coming. Listened anyways
blessedarethecheesemakers
scottynotfromstartrek
My left ear really enjoyed that!
hackller
yes just noticed that! weird.
CorgisButtsDriveMeNuts
Perfect!
LadyNetrex
Ss expected.
thatsitigiveupimgettinganaccount
JohnSmithterms
Anyone know how to change the radio frequency using leds? Maybe with voltage regulators? It looks fake to me. I cannot understand how simple light from an led can do that besides frequency.
hmijail
it's not clear what's the circuit, but I can see it happening. Any long cable is an antenna, its length defines what frequency it is sensitive to. In that cable you'll get the envelope of the frequency, which is the audio in AM radio. If additionally that cable connects a battery and a LED, then the LED lights up with the power from the battery, but on top of that constant light there's the very tenuous variation caused by the AM reception. Any light receptor will also get that variation.
JohnSmithterms
Thank you, that does make sense when you explain it like that. That sounds like a fun project to do. Just get or make a sliding tuner coil and pull down some radio signals with a solar panel and a speaker. I need to give that a go.
friendsofsandwiches
the LEDs picking up radio stations is indeed VERY interesting. Makes me wonder about that whole radio station through your teeth fillings tales
Level21Magikarp
I wonder what radio tastes like.
kuscheck
The LEDs aren't picking up the signal though, they're connected to an antenna.
theskirrid
Much less common now that transmission power is regulated.
WhatzitTooya
More likely due to less AM radio stations on air. Doesn't work with FM (or digital radio) at all, and not just cause they use way less power to transmit.
WizardofAnus
Frequency modulation is fucking WILD.
moecurlylarry
That was an episode of Gilligan’s Island
CyberWizard252
RF is funny stuff. in the 90's, in my town, a subdivision got put in right where the signal from the local AM radio tower was strongest. My business partner had recently left his job as a broadcast engineer and had built that tower and figured it was a bad place to live. While working in the area I watched guys burn their fingers while putting up aluminum siding because it would catch enough RF to heat up. Homeowners could pick up radio on intercoms, baby monitors, walkie talkies, etc.
zenoshogun
And only nowadays we suddenly have mouth breathers complaining about modern cell towers going up in their area which transmit at maybe 30W per sector, vs the 10,000-50,000 or so of the above AM one.
CyberWizard252
While working at a transmitter tower in Toronto I was impressed with the sound quality of a pair of speakers hanging on the wall. The engineers used them to know if they accidentally took the station off the air. I asked what equipment was driving the speakers to make them sound so good. The nearest engineer laughed and pulled the speaker down off the wall to show that they weren't connected to anything at all.
Foxsayy
How did the engineers use them to know if the station accidentally took them off the air if they weren't connected to anything?
CyberWizard252
The RF energy in the transmitter station is so strong that the coils in the speakers pick up the radio station just with a few inches of wiring hanging off the back.
CyberWizard252
That's what lends to old adage that you can pick up radio stations if the fillings in your teeth are a little loose.
skipweasel
Basically it's a crystal radio. https://en.wikipedia.org/wiki/Crystal_radio
marsgoose
Accidentally made a crystal radio while electrifying friends acoustic guitar. If I used a 15' cable, didn't have pickup hooked up to built in pre-amp, and left the plug going to the amp in but loose, it would tune into a local Catholic AM station. It was really weird when it first happened because all of the sudden I got Gregorian chants out of the amp.
friendsofsandwiches
message from God.
marsgoose
It was in latin so no idea what it meant, it did kinda slap, amused me for at least 15 min playing with running it thru the overdrive and spring reverb the amp had. The tuning by jiggling a loose plug also wasn't very precise so add AM static and crackles to that.
AyatollahBahloni
I built one with my son in the '80s with a toilet paper roll, some copper wire, a germanium diode, and some other random junk. Picked up one station, but it worked. Kinda crazy.
HandoB4Javert
The late 1900's were wild.
ThatLoserTheFourth
Oh yeah? I made one with nothing but a squirrel, some string, and this radio I found
imaynotbeasmartmanjenny
NotSomoneElse68
Here's to being old. You can test if a TV remote is working just like this, but using AM radio. Put it on AM and tune to static - then point the remote at it and it will make the same noise as the example in the video. I don't know if it works on other things, I've never tested it.
RootMeanSqr
For RF remotes, not IR remotes.
TheGlow
You use your phones camera for IR.
RootMeanSqr
Am radio picks up RF. Early remotes first used RF.
astrangehop
Early early remotes used mechanical clicks
WhatzitTooya
Probably also works with IR remotes. It picks up the magnetic field generated by the current going through the LED. You can also hear it when you get near the pickups of an electric guitar.
NotSomoneElse68
I believe it did work on IR. I don't know if or when a TV would use an RF remote.
mieper3
If you want to test your remote but don't have an AM radio at hand, you can also look at the remote through the camera of your phone. The IR led of the remote will show up reddish or purpleish when viewed through a digital camera.
NotSomoneElse68
I brought it up in the first place and even I can't think of anybody who would have an AM radio. Maybe a car radio.