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  • Hello! In this video I'll test what happens when a PDA,

  • a calculator, different TVs and a computer are close to a very powerful six-inch

  • neodymium magnet.

  • Some will survive, others... well let's just see...

  • First up is the iPAQ.

  • No, not iPad - the iPAQ. This

  • is a PDA which is like a smartphone just without the phone...

  • When put on the magnet the PDA decides to turn itself on.

  • It never did before. Other times it completely reboots.

  • However it does seem to work even when directly on top of the magnet.

  • The magnet did break the battery lid

  • into pieces but there was no instant electrical death.

  • The PDA did refuse to turn on at some point

  • even though I held the battery in place. This was solved by taking the battery out

  • and putting it back in. The lid however... never worked again...

  • The calculator worked flawlessly. It could do simple math

  • Hehehe, dividing by zero was still a major error

  • And even a sine-wave graph looked alright.

  • It does help

  • that the backplate and battery lid are held by screws. Very impractical when

  • changing batteries

  • but good for fighting a magnet.

  • Next on the test bench is a 21 inch TV.

  • Let's first try my largest ferrite magnet on it.

  • It is much smaller and ferrites are around 10 times weaker then neodymium magnets

  • so we should see a big difference in the effect on the TV.

  • The four-inch ferrite magnet has an effect at around 30 centimeters from the TV.

  • The six-inch neodymium magnet at around 150 centimeters.

  • At zero distance the difference in strength is very noticeable and gives a quite beautiful show. Enjoy.

  • But why does the image react on the magnet?

  • Here's the simplified explanation.

  • The image is drawn using electrons that have an electric charge

  • and therefore react in a magnetic field. A transformer delivers high voltage to

  • a vacuum tube

  • and this electron gun that emits electrons. The electrons coming

  • out of the electron gun are focused to a beam using coils that are basically

  • electromagnets.

  • The coils can also guide the beam from side to side

  • and up and down and in this way draw the image.

  • But the electrons will also follow a strong external magnetic field.

  • This almost looks like a screensaver - although

  • it is doing anything but saving the screen.

  • Flat screens don't use electron beams so they are not affected in the same way.

  • I did however manage to dim the background light on this LCD TV.

  • Alright, this is the final fight.

  • I recommend at least two meters distance between this big magnet

  • and a computer but here we are at 1 meter. The monitor is reacting to the magnet

  • but no instant death for the computer. Let's go closer.

  • At 60 centimeters

  • the monitor is messed up but still no dead computer.

  • It may have lost data but the picture I test with

  • is still there.

  • No more mercy. Let's try at 8 centimeters. This is dangerous.

  • Not only for the computer.

  • The monitor is throwing up all over the place. The computer is still working...

  • To avoid destroying myself

  • I wouldn't go closer than four centimeters which is painful enough...

  • After adjusting the screen I opened the picture again.

  • But

  • the picture folder seemed to be gone?

  • Uh oh!

  • It's dead.

  • Later, the mousepointer froze and I realized

  • that the computer was dying in front of me...

  • I killed it.

  • I have officially killed a computer with my 6-inch neodymium magnet.

  • What?!?

  • Huh?!?

  • Without any error message

  • the computer had restarted.

  • After an error message

  • about time and date not set I pressed F1 to boot

  • and all I got was a blinking cursor and plinking hard drive.

  • Maybe it would help if I removed the magnet. That is...

  • if I can...

  • Ahhh, the poor thing...

  • Whoooops - disk controller failure. That's bad...

  • Later I tried to restart it again and received different errors.

  • It never recovered.

  • The conclusion of this video is

  • that neodymium magnets must be kept away from things you don't want to destroy

  • but you can have a large neodymium magnet in your home

  • without blowing all the electronics and having air planes crashing into your backyard.

  • At two meters distance from even the 6-inch magnet

  • the Earth's magnetic field is the strongest so just keep a distance.

  • Remember to subscribe because in one of my upcoming videos

  • I will dissect the hard drive and see if there's any physical damage.

  • I will also try to explain how they managed to put a neodymium magnet inside

  • all hard drives.

  • Thanks for watching!

Hello! In this video I'll test what happens when a PDA,

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あなたは、このゲームをプレイするために必要なものは何でも持っていますか? (Monster magnet meets computer...)

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    Jerry に公開 2021 年 01 月 14 日
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