Are Magnets Really Threatening Electronics?
Many people are paranoid about having magnets close to electronic products, worrying that the screen will be deformed, that the stored files will disappear, and that the smartphone will be damaged by the magnet. Are people’s worries unfounded? Or do magnets really pose a dire threat to electronics?
The effect of magnets on electronic products
According to Digital Trends, Matt Newby, an executive at magnet sales site hsmagnets, explained, “This concern may come from previous electronic devices, such as CRT monitors and televisions, which were susceptible to magnetic fields. Bringing strong magnets close to these types of products can cause image distortions. Modern TVs and monitors don’t suffer from this.”
The most modern electronics such as smartphones are not affected by small magnets. But is it really so?
The effect of magnets on smartphones
Matt said, “The magnets we encounter in our daily life, even the fairly strong magnets on the market, do not adversely affect smartphones. In fact, smartphones have a large number of very small magnets inside, and it is very important that they are done. features. For example, Apple’s new Apple Watch uses a magnetic-inductive wireless charging system.”
However, there are a few factors people need to consider before letting magnets touch their smartphones, Digital Trends said. Matt warns that magnetic fields can temporarily interfere with digital compasses and magnetometers in smartphones more seriously than people think.
Using an iPhone, engineers at magnet sales site MPCO Magnetics demonstrated the effect of magnets on sensors inside a smartphone.
Michael Paul, an engineer at MPCO Magnetics, explained, “The problem we’ve found is that a magnet that’s close by can affect the magnetic sensor in the phone, and the digital compass will read incorrectly. Worse, if the strong magnet is tightened When touching the mobile phone, the iron components inside the mobile phone will be magnetized and become weak magnets, which will bring difficulties to the compass calibration.”
Some users may think it doesn’t matter because they don’t use the compass app, but that doesn’t mean other apps don’t rely on the compass. For example, Google Maps uses the compass to determine the orientation of the phone, and many games use the compass to “calculate” the user’s direction.
Apple takes this into account in the design of phone cases and accessories. “Apple recommends avoiding the use of magnetic and metallic materials in the case,” Apple said in its “Design Guidelines for Protective Cases.” Manufacturers must ensure that the built-in magnetic compass is not affected by the case. The iPhone 6 Plus was given special “care” because magnets can cause potential problems for ca
meras with optical image stabilization and autofocus.
Magnets may not kill the phone completely, but they can disrupt some important functions, so why take the risk?
Are hard drives affected by magnets?
The idea that magnets can delete data from hard drives is very popular, especially in movies and TV shows. In “Breaking Bad,” for example, Walter White tries to destroy evidence in a hard drive using a giant electromagnet. Worried about magnets erasing data from your hard drive too?
Matt pointed out, “Data recorded with magnetic materials can be erased by magnets, including cassette tapes, floppy disks, video tapes and credit cards. If the data is recorded with magnetic materials, it can be destroyed by magnets.”
Matt explained, “Theoretically, a magnet strong enough to destroy the data on the hard drive could be used to make direct contact with the surface of the hard drive. However, neodymium magnets are used inside the hard drive to operate the read/write arms and record data, so Hard drives won’t be affected by common gauge magnets. For example, sticking magnets against the outside of a PC case won’t have any effect on the hard drive.”
Users of USB drives and solid-state drives don’t have to worry. “USB drives and solid-state drives are not affected by strong static magnetic fields,” Michael said.
Engineers at K&J Magnetics tried to use neodymium magnets to destroy data in hard drives, but they were disappointed. They placed large magnets on the side of a running hard drive until a mechanical rubbing sound could be heard, indicating that the magnets had caused the internal parts of the hard drive to bend. Despite this, the files stored on the hard drive are still 100% intact.
Using a larger magnet to act on a closed hard drive, the files were not affected at all when the hard drive was turned on. Clearly, most businesses use physical methods to destroy hard drives, as relying on magnets to delete data is unreliable.
Do people need to worry about magnets?
“At home, we’re surrounded by magnets—magnets in every computer, speaker, TV, engine, smartphone,” Matt said. “Modern life requires magnets.”
Digital Trends points out that magnets may seem wrong, but it’s worth pointing out that one should still be cautious when using strong magnets. Michael explained, “Strong neodymium magnets are not toys, and there have been recent media reports of magnet toys being swallowed by young children, which can pose a serious health risk. Because the magnets attract each other and cause the intestinal wall to be pierced. In this case, it is necessary to Surgery now.”