Monster magnet meets monitors...
ฝัง
- เผยแพร่เมื่อ 27 ต.ค. 2023
- What will happen if a strong magnet is put near a monitor? In this video, I will test two screen technologies: old-school CRT and flat-screen LCD.
They will meet my largest, strongest magnet and respond in different ways. Will they even work after the challenging tests?
One of the 150x50 mm disc magnets donated earlier by www.magnetportal.de/
My Patreon-page: / brainiac75
Monster magnet meets plasma ball: • Monster magnet meets p...
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"Darkness is Coming" Kevin MacLeod (incompetech.com)
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Intro part looped.
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"Perspectives" Kevin MacLeod (incompetech.com)
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"Lightless Dawn" Kevin MacLeod (incompetech.com)
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"Neo Western" Kevin MacLeod (incompetech.com)
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"Long Note Three" Kevin MacLeod (incompetech.com)
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Time codes: 10:04 + 13:50
"Impact Andante" Kevin MacLeod (incompetech.com)
ISRC: USUAN1100621
All music above licensed under Creative Commons: By Attribution 4.0 License
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Time code: 9:36
Mix of two tracks:
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Licensed under Creative Commons 0 license
2) "Spacial Harvest" Kevin MacLeod (incompetech.com)
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#Magnet #Monitor #CRT - วิทยาศาสตร์และเทคโนโลยี
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Hi! Thanks for watching. Comment if you have ideas for further testing of the monitors - or something else the monster magnet should meet...
I would like to test if X-rays/bremsstrahlung escapes when the electrons are focused down to a tiny spot on the CRT screen by a magnet. Does anyone know how to easily detect soft X-rays below 30 keV? They are not ionizing enough for my detectors.
Maybe you could try how a Plasma TV reacts to the Magnet. :)
how about on an ev electrical motor? are they shielded well enough?
What I'm wondering about the 22" monitor from 2009 is if you put a plasma globe near the back where the fluorescent backlight tubes are, what will happen to the video? Because I know that fluorescent tubes are lit by microwave radiation and plasma that comes off a globe. Maybe make a video about that?
Hi Brainiac, I would use a plain and simple electroscope, that should do.
Expect the CRT to be sort-of trashed after you do the experiment. Focusing the electrons to a single point will most likely burn the phosphor in that place (unless you turn the brightness really low).
So he was roughly 10 feet away from the monitor with a magnet and it was powerful enough to distort the image. That’s absolutely INSANE!
I wish I had this as a kid, that would be so fun to play with a CRT
Well electrons don't weigh much, so theyre not hard to move exactly
The patterns on the CRT are actually really beautiful. Always super cool to see physics in action!
I'd love to see how a cassette boombox reacts to the monster magnet!
They look like complex function plots.
I would like to see the boombox as well!
The magnetic fields in the NMR room back in college were absolutely insane. You had to leave your wallet near the door because they could wipe your cards easily. Monitors 20-30 feet away from the magnets would show color distortion all the time while you used it. The room had an emergency blower system that could completely vent the room and replace the air in under 30 seconds (and it was a BIG room) If you accidentally quenched the magnet the liquid helium would flash vaporize and displace all the oxygen immediately. You had about 20 seconds at most after a quench to get to the wall and pull the handle or you would go unconscious and die.
MRI and NMR are always fascinating, the strong magnetic force but you don't feel anything! Imagine a whole "NMR" apparaturs circling around your body in an MRI scanner... Nowadays even NMR with permanent magnets exist, they don't have to be cooled.
@@Laralindatoo bad permanent magnet NMRs suck, only like 60 MHz vs 1.2 GHz for cryogenic ones. Still useful tho
Why wouldn't it vent automatically?
Good question! It's called multilayer safety. Basically You absolutely have a sensor to detect dangerous events that need reacting to. But...where do you put the sensor? And how sensitive is the sensor? Too sensitive and it goes off just from normal events. Not sensitive enough and it's useless. So you have a middle ground. But that middle ground, plus where you place the sensor may mean that it doesn't detect things as fast as you do. Or maybe it does. Regardless, Having the human being in danger primed to run away from the danger towards a a lever is a good idea. And so the system may already be activating, But on the chance it isn't, the human is a backup safety device. And if the system IS working, the human is running away properly. 2 layers of safety in one device!@@shanent5793
You'd think those two buttons would just be connected. There's no scenario in which you press one but not the other.
Big magnets near transformers will also cause the inductance of the windings to decrease, which can cause the current in the primary winding to increase, which might cause a switch mode power supply's overload protection to trigger, a fuse to blow, or something to burn out. My guess is that in the video, some kind of overload protection triggered before any permanent damage was caused.
Seems to be a common feature on integrated controllers.
The discrete solutions are more likely to blow up.
The effect on the ferrite core would be way more relevant than on the winding, ferrite cores when saturated have a very sharp decrease on the inductance mostly if they do not have a magnetic gap which is the case of those transformers in this video, iron powdered inductors are way more tolerant in that regard
Yes it's a switchmode thing
I once made a small magnet from a dvd player get close to a power supply, It shorted out and i NEVER made that magnet get close to that PSU ever again
@@tiagoferreira086 And the saturated ferrite core in turn affects the inductance of the windings.
2:15. Woah. Anyone else feel a literal flashback as that monitor warmed up and he adjusted the picture? Crazy.
I did ;)
"i will force my way in"
* proceeds to carefully disassemble the screen 😂
I used to have a 21” CRT monitor, back in the day it was BIG! Taking it home I had to carry it up 3 flights of stairs and this thing was extremely heavy.
It had a degauss button, when pressed the desk shook with the power of the thing.
These days I like to sit back with my average 40” monitor that weighs so little in comparison.
damn I wanna see that now
Yeah, I remember our family's 29" CRT TV took 2 people to move around, not only was it 30+ kg but at that size it's not even just the weight that is a problem. You just can't hold it properly.
It's funny that LCDs weigh so little but in comparison my 21" PC CRT weights proportionally more than the 32" living room TV, both LED backlit ones and the PC monitor doesn't even have a power supply built-in. Guess they just use way thicker glass on it.
that's not a monitor that's a tv lol
@@turkey_sandwhich
Well a 40” TV used as a monitor, it’s all good! 🤣
I remember monitor's having the degauss button but never seen one shake
so happy seeing the return of this crazy magnet after 8+years!
Over 8 years, it has grown and is now double as big ;) Much more encounters to come!
@@brainiac75windows eaten by monster magnet :>
Left hand rule is always confusing, but somehow, seeing that Windows 7 screen move up and down just made it click.
I've got a fun idea: can you keep the electron beam stable with two opposing magnets on either side?
No, because the beam travels left to right and down the monitor, exactly like you read the words on a page. Because of that movement, one magnet will always have more effect over the other on the electron beam since it's closer and the image will still be distorted.
Something about the plasma globe + 46" TV lamps scene is absolute art. What a lovely angle and color palette.
Finally, an new episode of this series, still an amazing video and it learned us that how dangerous that magnets can do.
A few days ago I randomly remembered watching your older videos with the monster magnet, lo and behold, there you are in my recommendations again! Pretty cool that you're still on YT :p
love your videos. this was special to me as I actually ruined some CRT TVs when I was younger and got in a lot of trouble. I was curious about everything to do with magnets...it felt like magic
Holy crap, I would be afraid to have a magnet as strong as this strongest one of yours at my house!
I have a battery implant that works a bit like a TEMS machine so I cant play with magnets. So Im glad you can "test" things for me 2x👍
I love all your videos and have learned a ton watching them. Thanks
Great - I usually also learn something from making them. Thanks for the early watch!
Another very interesting Video! 👍 :D
2:32 I did absolutely not expect that the magnet has an effect to the screen at this distance...
Shows how powerful that magnet is compared to what we've all undoubtedly played with when messing with CRT's as kids.
Thanks! Adding that extra magnet - doubling the length - really has given the magnet some extra reach!
That's a really good CRT. Very strong degaussing coil too.
I've got a number of cheap Belinea monitors which get easily messed up by a decent sized iron speaker magnet. Took a number of hits with the degauss to get it somewhat repaired.
I absolutely love your videos. Each and everyone of them is a pleasure to watch.
When I was young and playing this way, there were no such magnets available yet. Looks amazing.😊
You know its dangerous when there is "DIE" printed on the magnet
This video reminds me of a story that my father told me: His TV wasn't working properly so they had a technician look at it, but he saw no problems. So after he left they set it up again and the issue happened again. The technician came back and it worked fine. This time they set up the TV with it switched on, and when they placed a magnetic sculpture on top the issue came back!
I've veen always curious about it, thanks for the explaining.
So glad to see the return of this crazy magnet!! Hope all the cameras remained okay!!
Glad you like it! The camera's are fine :) Luckily they don't record on magnetic tape like back in the days but on SD cards which are not affected by magnets: th-cam.com/video/WhqKYatHW2E/w-d-xo.html
I have at times seen the autofocus be affected by the magnetic field. And one camera even turned off at some point. I think they use a magnetic sensor to sense when the flip-out monitor on the camera is closed - with a little magnet in the monitor frame. The big magnet made the camera think the monitor was closed which is a sign to turn off :)
Pro tip: Use the right hand rule if you want to use the true electron direction :)
Yep, you can use the right hand for the left hand rule if you want to point the middle finger in the electron direction. But the 'right hand rule' term is usually reserved for something else ;) I use it in the Monster magnet meets aluminum can video for eddy currents direction: th-cam.com/video/IDjqeLpjI4A/w-d-xo.html
Since moving magnetic fields induce current, I wonder if you could move a large magnet near either monitor quickly enough to cause permanent damage (in a safe manner)
Fabulous work, I'm impressed how well your CRT monitor was able to degause itself. Thanks Brainiac, take care.
Excellent video. Thanks for creating.
I've secretly been hoping for another video like this
I think when it means "Low Emissions" CRT's that were improperly calibrated would send out xray emissions past the glass, which for a monitor designed to be close to your face, was not very good, and CRT's are also well known to destroy eyesight, I assume that one would be less likely to do so.
The front is quite much a radiation shield (1 cm+ thick glass with additives). The back-side is probably less shielded.
@@erlendse yes. Back in the early days technicians would retune the CRT to but out more brightness, especially when the tube is dying, by doing so would cause the CRT to put out more radiation than is typically safe.
Some models of CRTs actually put out more radiation than the average CRT should've from the factory.
This is just a "hey this monitor won't kill your eyes as much" badge.
@@erlendse the back side is shielded usually with metallic paint on the outside of the glass, it's shielding for the degaussing coil. But otherwise they're painted black for better contrast iirc
X-rays can still pass tho
“MAGNETS!”
-Jesse Pinkman
As a former physics student I have never watched a better demonstration of the left hand rule. And when I was a student CRTs where basically the only display technology. Guess even then education was starved of resources and nobody wanted to risk breaking a TV.
That LCD panel from 2009 uses a CCFL tube
CCFL tubes do use more power than LEDs.
CCFL require high voltage to use as seen on the circuit.
LEDs just need 12,24, 36 or 48 volts, larger the monitor the more voltage the LED backlight needs.
Amazing explanation
I first found this channel from “Monster Magnet Meets Computer” years ago. Neat to see a similar video all these years later.
Thanks for the video!
I remember watching this guy when I was like 7. Im 14 now and i can see why i watched him. His videos are very satisfying and cool to watch.
11:00 i like how you used a bike tire lever to take apart some of the monitor. XD
Was always a problem doing magnet therapy with clients watching TV . Even the large screen TV had a CRT in the bottom focused with a Firenzel lenze on the screen.
I miss the days of CRT tvs.
I had one when i was really young that had a built in VHS player
the screen distortion looked so cool
I liked the monitors with manual degausing. I didn't know what it did at the time, but it felt cool to me and I always felt like it made everything look better. Just like the turbo button on my PC.
Fantastic, it's amazing how smart the digital technology is around our houses
i think we all remember 'breaking' a monitor with a magnet, only to realise turning the magnet round could fix the damage, panic over! :D
Every time that giant magnet makes an appearance I grow more frightened of its awesome power.
Да это точно я конечно понимаю что ты вряд-ли узнаешь что я сказал но я с тобой согласен
@@SleepSidecat Спасибо за ответ, гугл переводчик отличный.
Really nice video!
I never knew that hand trick, thanks for showing us thanks
Finally your back to making a Monster Magnet videos I'll give you a sub
That's wild man!
I love how graphical parts respond to electromagnetic forces! When I was a kid I would watch videos where people would mess around with computers to see what the graphics would do. It's interesting to see it like this.
I had a "professional" flat 21" crt, the degauss also shook the table and i had to do it quite often due to having dual 15" speakers on each side of the table for ... Games. When i cranked up the volume the colors got all funky, very fun.
Wow, very interesting video, thanks!
AWESOME video!!
I'v been waiting for thia for so long
Legendary comeback
Imagine creating magnetic pulses using this magnet and a rotating shroud.
Very interesting experiment. I would like to mention something I noticed at 7:13.
When you bring the magnet close to the edge of the monitor the background towards and outside of the window seems to freeze.
Probably just an illusion on my part, with the wind just stopping at that moment.
Great video!
Magnets are so neat.
CRT's are still superior to LCD/LED/OLED displays for some things. Retro gaming to name one.
What a great video ! The CRT tv was really nice. The TVs CCFLs were really interesting. Thinking that LCDs used to be lit up by plasma
CCFLs technically are a plasma light source, they just use argon and vaporized mercury to produce UV which activates white phosphors.
@@Snowcube yep, that's what i like about mercury vapor, sodium vapor metal halide and fluorescent tubes. They all create light trough plasma. Seeing a clear mercury vpor or metal halide lamp is very awesome. CCFLs just look really cool. Especially the ones without coat that emit red light
1:05 this music makes me wanna chug a 30 year old bottle of Crystal Pepsi
Wow, I can't believe the shadow mask survived that magnet! I thought for sure it would be toast after that magnet.
Reminds me of when i put a magnet on my family TV as a kid and panicked when it left a green "potato" on the screen.
I didn't know about automatic degausing at the time, but after a few power cycles it went away and my dad was no longer angry since i was told not to do it! But i had a black and white TV in my room and they don't care about magnets, so I thought he was lying and had to test it. 😂
An old TV at my folks place still has a blob with a purple hue in the corner. NO IDEA how it got there.
Thanks for sharing! It is a little sad that I have thrown my first TV away. A 14" black and white CRT. As I remember it, the TV still worked when I got rid of it - but without colors it was obsolete even when I bought it in the 1980s x) Could be fun to test with a magnet today. I wonder if I can find a working B&W CRT TV in 2023...
@@brainiac75 good luck finding one, even the most modern monitors from the 2000s are an uncommon find. I myself use a 19" CRT as my main monitor, got it from my parents who had it since it was made in 2002. I have fond memories of playing games like the pinball game installed on copies of Windows XP on it in the olden days
Holy COW! I had no idea your big magnet would screw with a CRT so badly and even from so far away! Yeah, I've messed up CRTs with even tiny magnets as a kid, and what sucked is that some were so old that they didn't have a degausser, so like... on my parents' TV they'd just get mad for a bit and then we'd have to wait months for the discoloration to finally be gone. What was fun later is to mess with a CRT that has a degausser and then you can just degauss it once or twice and it's back to normal.
7:08 the monitor was like "eww monster magnet i dont want my face to get attached to"
Man i had to double check this wasn't an old video being recomended again by youtube like the old server meets magnet and such, i legit thoughr "has it really been 10 years? dayum" and i had to double check myself 😂😂😂
I remember seeing a story on Reddit about how some office Karen had kept shoving her expensive Bose speakers against a very expensive and high-end monitor, and it had a slight pink tinge at the bottom. In the end, the IT worker had taken it away and commandeered it after it was inteneded to just be thrown away. Last I remember in the story was them using it for years before the pink tinge spread and ruined the monitor.
I will be afraid of having that magnet anywhere near my home
Curious if a newer monitor would behave differently, since they mostly use LED backlights now instead of Florescent Tubes, meaning there would not be a high voltage component.
I'm also a little curious if the monitor is still "displaying" an image after it goes black, but just the backlight has shut off so we can't see it.
Probably the switch mode powersupply shut off because of overload. I once put a magnet on a switch mode transformer and the psu gone into error shutdown mode and before that it drew a lot more current. So i think the main powersupply also shut off
Cool video again from my favourite channel!
Glad you like it - more to come!
Imagine working on an old decade monitor and someone enters the room with this magnet
The Nosatlgia in the beggining wow 😂♥️
The CRT Monitor is so much more revivable that even a flatscreen, lmfao. 😂
Fun video, your content is great 👍
Please try using this super magnet in a camera sensor. I have a hypothesis that the background black response will be upgraded. The magnet will constrain the thermal generated electrons in the sensor area
a true classic, its always fascinating to see the invisible forces of our universe
Nice conclusion.
3 meters away and already influence on a crt, that magnet is No Joke.
Which as a recurring viewer I already knew for years but it still amazes me.
After doubling its size, I feel like the magnet really has gained some reach. Maybe I should buy a second 200x50 mm and compare the difference in reach between a 200x50 mm and doubled 200x100 mm neodymium magnet x) But it is over €1200 and will be a pain to combine the two without breaking both :-[
When I complained about the necessity to follow the conventional current direction when applying Flemming's left hand rule, my teacher told me just to use my right hand instead as long as I remembered to switch hands when appying it to generators.
Somehow you made me miss him.
imagine getting a speaker next to that only to realize your TV got messed up
Judging by the sound the monitor's HV circuit was making the voltage booster inductor was not very happy with a huge magnet fiddling around with the ferrite inductance.
Given how those booster circuits operate the magnet could have stopped the oscillations and the booster could not resume until a power cycle.
Back in the day i used to fix some tv's that for some reason got the grid magnetized, by using a tv speaker magnet and running it next to the screen in vertical and horizontal passes, sometimes it need to be more focused on certain spots, it worked 100% of the times.
A CLASSIC!
there's something nostalgic about having silly considerations like the speakers being shielded or they mess with your monitor. That anything could interact with anything in the house.. Like the GSM's made the speakers do *that sound*.
Great, now I don't have to try this experiment😁👏🏼👏🏼👏🏼👏🏼👏🏼
Seeing the lamp actually slowly wave around as that large magnet entered the room, my eagle eye saw. Even THAT FAR AWAY, can have some pulling effect on things such as that, im not lying, look closely! As the CRT showed the distortion as the magnet wobbled around, you could see the lamp react too in gentle ways!
Yep, you're right. Since the magnet doubled its size, I feel like it has much more reach. Need to make a video about it measuring in more details what effect it has at distance to double the length/thickness of a magnet. Thanks for watching carefully!
>monster magnet
waaaaahhhh space lord mother mother!
made me listen to this band again as you destroy a perfectly working HP monitor beyond degaussing.
That would make a great movie special effect
3:54 I always remembered the focusing magnets on CRTs being on the inside of the neck. I guess there's no difference though.
Oscilloscope CRTs use electrostatic deflection and focusing, so everything is inside the tube except for the trace rotation coil.
Most TVs use electromagnetic deflection, which uses external coils although electrostatic deflection was used in some TVs in the 1930's and 40's.
@@rocketman221projects Funny fact, I've only ever worked on CRTs on old scopes. haha, so your comment certainly tracks!
More like correction magnets. The focus is eletrostatic on all CRT displays I have encountered.
There's an old saying "All roads lead to Rome", now i wonder if "All compasses point to Brainiac"
Maybe a suggestion, take your magnet somewhere, then use a standard compass and maybe mobile phone compass app to see how far away you need to be to not have then influenced by the magnet. ;)
I still use a circa 2005ish VGA CRT and a scaler for retro games and consoles. They are becoming more rare, so i hope you dont do too many of these types of experiements (as awesome as the video was! Lol)
I had that exact flat screen monitor a decade ago :D.
Older CRT TV's & Monitors occasionally needed degaussing*.
* the removal of unwanted magnetism from a television or monitor, in order to correct color
I remember playing with old CRT tvs and magnets
i remember doing this on crt tv's with the typical ceramic magnets as a kid
Looking forward to your take on the Bored Ape UV disaster!
What's the deal, YT? Brainiac is the most wholesome channel i sub to and you dont give me notifications when he uploads? SHAME ON TH-cam!
The Poor HP monitor has been through everything, I would've thought you'd have thrown it out alongside the Compaq Desktop a long time ago.
ah yes, monitors and magnets. a past time for 5 year old me, a horrible sight for my dad who walked into the living room after realizing i was quiet for too long LOL