Sensors and magnet
Some phone models have blocking sensors and accelerometers that include a reed contact in the design. The contact reacts to the magnetic field and, accordingly, may fail.
Sensor and magnet
do not use a reed switch contact , so the magnet does not affect the operation of the devices. The flash memory of a smartphone is also not affected by the strongest magnetic field.
Buy a neodymium magnet for a water meter in Ukraine
If you decide to use magnets to stop the water meter, follow the safety rules - these are not toys. Their strength is such that they can harm children, and large ones can harm adults. The information on the site is presented for informational purposes only and is not a guide to action; the site administration does not bear any responsibility for your actions! Using magnets to stop meters is illegal. A magnetic washer on a water meter is the safest and most effective way to save money.
Another question has arisen.
I assumed that it was possible to remove the magnetization with a magnetic loop, or whatever it’s called, the one with which picture tubes were demagnetized before.
Useful tips
To prevent the TV from being magnetized, you should carefully study the recommendations of experts presented below. To avoid problems such as magnetization, it is necessary to operate the equipment correctly. This requires:
- disable it correctly: via a button;
- After work, give the equipment time to rest.
If a posistor has failed and it is not possible to replace it with a new one, then this element can be removed from the board, and you will need to use a soldering iron. However, this will only cause a short-term demagnetization effect - after a while the screen will return to its original state.
In modern TVs, magnetization is checked by selecting the “Blue Screen” function.
To do this, you need to go to the TV menu and find the item of the same name. If this section in the menu is enabled, then if there is no antenna or if the signal is of poor quality, the screen will turn blue.
So, select the “Blue Screen” function, turn off the antenna - a blue screen appears. At the same time, we pay attention to the quality of the blue tint. If there are spots of different colors on the display, this means that the screen is magnetized. It is worth noting that modern LCD monitors have a special degaussing function, which is located in the equipment menu . For this reason, using it will not be difficult.
See below for how to demagnetize a kinescope.
Internal structure of the element
A resistor changes its resistance with heating, just like a posistor. How to check the first element? This one is simple. The resistor values fluctuate within insignificant limits. A posistor is capable of completely blocking the current passing through it, just like a themistor. Only the latter exhibits an inverse dependence on temperature.
To know how to check the serviceability of a posistor, you should determine its main operating characteristics. These include:
- nominal resistance at normal ambient temperature (usually 20-25 degrees);
- The switching resistance is determined at the point of the resistance versus temperature characteristic when the first parameter increases by 2 times compared to the nominal value;
- the maximum voltage that the element can withstand without failure;
- current load values: rated, switching, maximum possible and stalling; For testing, these parameters are important only if the posistor will be used in high-precision circuits.
Methods for demagnetizing metal
There are several ways to demagnetize metal structures. Devices are used depending on the frequency of use, purpose and power. Before you demagnetize metal at home, you need to understand the existing structures.
- An ordinary magnet is large in size; a tool is held over it at a minimum distance, on the verge of the attraction process. The magnet can be removed from an old speaker, most of which are round in shape. The process is carried out when the product is removed from the structure, loosening it; the further the tool is from the structure, the smaller the amplitude. The location of the axis on which there is no magnetic field depends on the design of the product.
- More frequent use will require a device operated at home from the mains. It is possible to make the device at home or purchase it at radio parts stores. The main component is a coil of wound wire connected to a transformer. The supply of alternating current allows you to demagnetize the element, direct current - vice versa.
Removing magnetization with a magnetometer
There are many variations and kits for demagnetizing metals in production.
The size of the hole can be different, depending on the purpose and dimensions of the parts being processed. Multi-band magnets driven by motion, rotation of which occurs with speed control, the impact and change in amplitude is carried out by moving the part away from the body.
Electromagnets operate from a 220 or 380 volt network and allow you to demagnetize an element with a tap for a certain time. Container mechanisms allow you to install the product to a device in which the necessary environment is automatically created.
Activating built-in protection
Each CRT TV has built-in protection against screen magnetization - the so-called demagnetization loop.
To put it into action, just turn off the device for a while and let the loop do its job.
You need to know that this loop starts working only when the device is disconnected from the power supply. The thing is that when the power is turned on, voltage is supplied to the posistor continuously, and it cannot limit the supply of energy to the demagnetization loop. In this case, the demagnetization system remains inactive. Experts recommend periodically disconnecting the TV from the electrical network to prevent possible problems with the picture tube.
When choosing this option, it is worth considering that the loop cannot cope with the strong magnetization of the kinescope. In this case, you will have to resort to the second method.
Vladimirs Vorohobovs
Many irresponsible residents take advantage of this. installing magnets near their meters and thus stealing water.. However, now there is an inexpensive seal that can be put on an already installed water or gas meter. Like a regular seal, it has its own unique number or letter code, which can be recorded in a journal and thereby verify that the seal has not been replaced. Installing such a seal on a meter does not require complex skills.
I didn’t find a single loss, I also found a court - a fine against them for tax evasion.
In general, to give more information against scammers:
1) We meet with them at the office to make a claim (in my case, I didn’t even find an office - at the specified address there is a nine-story residential building). There are no workers. The manager, a 24-year-old boy, refused to meet with me at a time convenient for him - he sent a written complaint about poor-quality measurements. I refused to pay the cost of measurements - 350 rubles for each meter (I have 4 of them and they all showed the same value, like other cases - very interesting, isn’t it? Do they have a scale with one value?) , because does not want to take repeated measurements in my presence and provide the documents required by law.
2) We look carefully at the measurement report - there are no signatures of the measurer (strange, the one who measured refused to sign the document...) and members of the commission. Only two negotiating bosses. Moreover, there was no commission - it stood on the site and did not enter the apartment. What then did the head of the HOA sign if she was not present during the measurements?
3) We read the laws and immediately forget about this piece of paper... We ask them for an accreditation certificate (costs 200 thousand, requires an office, equipment and at least two certified specialists) and a certified methodology (issued only by the Ulyanovsk Metrology Center)
4) We write to the manufacturer with a request for an independent examination and receive from them a colorful color letter with three seals and the signature of the deputy director that there are no norms, no standards, no GOSTs, and no internal specifications to refute or confirm the measurement result . No one has ever measured them and no one is going to do so. (Well, Ulyanovsk is ahead of the rest! And why is it that only we have come up with the idea of measuring something, but not Moscow?))
5) For insurance, we call the metrology center and present to the chairman of the HOA the specified certificates of verification of the certified (and ONLY
in Ulyanovsk an organization) that has the right to check water meters (it turns out that not everyone who gets there has the right to check them...)
You can stop the water meter with some tricky manipulations with a neodymium magnet. To do this, use a magnet in the immediate vicinity of the counter to find the point where it stops completely. This can be the front side, the side surface of the meter, and less often the back wall of the device. The reader performs all manipulations experimentally at his own risk. This information is taken from open sources on the Internet, is provided for informational purposes only, and does not oblige you or push you to anything.
Speaker and magnet
The speaker design includes a magnet. phone models from Apple , Samsung , LG , and Sony developers have protective screens that remove the effect of an external magnet.
Smartphone speaker
Conclusion: The latest models of gadgets from the above companies are designed taking into account protection from magnetic influences.
Hidden text
now here's some damn advice
You need to find an output transformer from a tube TV, their Hi-End people love TVZ-1-9 or TV-ZSh and make a demagnetizing choke.
I took a 220 volt coil, I don’t know why, with a diameter of 10 centimeters, without any cores, just on a round plastic frame. You can't use a permanent magnet, it will ruin everything even more. You can take a coil from a large starter. And with the kinescope turned on, using circular movements, like an eraser, without bringing it close to the screen and observing visually, you remove the magnetized area.
How to make a demagnetization device at home
How to make a knife with your own hands at home It is possible to make an electromagnet for demagnetization at home; for this you will need some materials and available tools. Operation occurs by controlling the current; constant voltage can magnetize the element, while alternating voltage, on the contrary, produces action.
Homemade device for demagnetizing metals
The coil can be made from parts of an old TV, or rather the demagnetization loop of a kinescope
It is important to maintain consistency during manufacturing for the correct process
- The loop is folded several times until the coil reaches the required diameter. If one loop is not enough, you can sequentially add a second one; this design will allow you to work with large elements.
- A fuse and a button are connected for normal, uninterrupted operation.
- Designs for 220 Volts can be used constantly, those designed for 110 V are connected for a short time, 12 V are used through a transformer.
Installation for demagnetization from a transformer
The resulting mechanism is perfect for large parts. When working with small devices, you can prepare a mini kit at home. For operation, any coil is used, for example from an old reel-to-reel player, connected in series with a transformer. Use occurs by applying voltage, the part is placed near the mechanism, then removed, while the power of the device remains on.
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