Sorry if this has been covered elsewhere, i havent been able to get an answer as of yet to the following question:
Is the metal battery panel magnetic? I have seen lots of conflicting information about the panel, and most reviews simply say that it is metallic.
I was thinking about making a magnetic car mount using a HDD magnet, if it is magnetic then is it thick enough to allow the magnet to grab with enough force?
Thanks in advance.
As far as I recall it isn't.
Using a magnet on a computer device is generally not a good idea. Plus you'll most certainly disrupt the internal compass, if not messing with ROM/RAM/SDcard data...
I wouldn't risk to brick my HD2 in order to create a ghetto carkit holder...
Rollmops said:
Using a magnet on a computer device is generally not a good idea. Plus you'll most certainly disrupt the internal compass, if not messing with ROM/RAM/SDcard data...
I wouldn't risk to brick my HD2 in order to create a ghetto carkit holder...
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The reason magnets are considered to be bad for computers is because of the fact that HDDs (and, further back, FDDs) use magnetic heads and disks to store and retrieve information.
If you aren't using a traditional HDD, or a FDD, then a magnet will not affect your computer.
However, the point about the compass is very valid.
As Spike said, solid state devices (ROM/RAM/SD) arent susceptible to being wiped by magnets. I did think about magnetic interference to the compass, but thought it was worth a try as HTC have released their own magnetic car mount, admittedly with a redesigned battery cover...
While we are on the topic of the digital compass, will a strong magnet cause any permanent damage to it? AFAIK it just results in the phone needing to be recalibrated, anyone have any experience with this?
whatever the point about the compass valid or not it won't work. tried it on my old krussel quick mount i have still stuck to my dashboard and i can confirm it is not / very little magnetic. would not come close to staying on.
poita said:
As Spike said, solid state devices (ROM/RAM/SD) arent susceptible to being wiped by magnets. I did think about magnetic interference to the compass, but thought it was worth a try as HTC have released their own magnetic car mount, admittedly with a redesigned battery cover...
While we are on the topic of the digital compass, will a strong magnet cause any permanent damage to it? AFAIK it just results in the phone needing to be recalibrated, anyone have any experience with this?
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I might be mistaken but I think on the one from htc the magnets only keep it from falling of the mounting brackets, they don't carry the full weight of the hd2. I have a magnet in my iMagnum case but it only interferes the compass one degree.. nothing to get lost over...
poita said:
As Spike said, solid state devices (ROM/RAM/SD) arent susceptible to being wiped by magnets. I did think about magnetic interference to the compass, but thought it was worth a try as HTC have released their own magnetic car mount, admittedly with a redesigned battery cover...
While we are on the topic of the digital compass, will a strong magnet cause any permanent damage to it? AFAIK it just results in the phone needing to be recalibrated, anyone have any experience with this?
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Click to collapse
that design of mount has been abbandoned by htc in favour of a more traditional holder. have seen the new design on clove. maybe htc realised it affected the compass?
optiknerv: Thanks for checking
Related
I've looked through Google and Yahoo! Answers, and found everyone saying they don't, but that goes against all knowledge of electronics and magnets. I'm just wondering from a professional user standpoint (xda devs), if the usage of magnets in a case's clasp hurts or degrades the phone's display/power/memory over time?
Sorry for the novice question.
Looks like you forgot to search within this forum
But from what people have been saying is that magnetic studs turn on the device, which then can lead to battery consumption. but that has to be some strong magnet, since most studs uses weak magnets that probably are meant for refridgerators(not the skinny ones). But then again many have reported that it doesnt affect the device in no way.
No it won't hurt the phone or data. There have been a few reported cases where a magnetic clasp may turn on the Kaiser\Tilt if it happens to be in the same location as the sliding keyboard's magnet (when slid open, the keyboard wakes the phone). I use magnetic catches and haven't seen anything unusual.
ekw said:
Looks like you forgot to search within this forum
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Click to collapse
No, and that was my mistake.
Thank you, both of you, for your insight.
Like the others said, it may just confuse the device on whether it is open or not and may drain battery if it turns on because of it.
I'm thinking of deconverging myself to two devices. I currently use my htc herald as my daily driver. I need to read a lot thesedays, so, small screen is not going nice for me. I'll be using athena as a standalone, non-connected device. I also have nuts on the newly released ipaq 210. Since, athena has 8GB HDD, it would be great to store my PDFs and movies.
The only thing that bugs me about athena is its magnet thing. I've head that it can destroy/format HDDs of laptops; discharge the parking cards(magnetic ones) etc. Is there anyway to stop this?
Also, putting it in its factory case removes the magnetic effect?
no the factory case is not also magnetised, without the phone being in it
the keyboard is the only magnetic part...
if dont use the keyboard you have nothing to worry about
boinger66 said:
the keyboard is the only magnetic part...
if dont use the keyboard you have nothing to worry about
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Click to collapse
So, the main unit does not have magnets..right?
No,that's not correct.The main unit does have magnet. It's even labelled on the bottom of the unit itself.
However, I've never found it to be an issue.
eaglesteve said:
No,that's not correct.The main unit does have magnet. It's even labelled on the bottom of the unit itself.
However, I've never found it to be an issue.
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Click to collapse
so the reports making the parking lot cards and formatting the HDDs are fake? hmm.. athena here i come
kdskamal said:
so the reports making the parking lot cards and formatting the HDDs are fake? hmm.. athena here i come
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I won't discount those report. I carry it without keyboard with a belt pouch. Therefore it never had a chance to come into contact with credit cards and parking tickets.
I've heard that the keyboard's magnet is much stronger than the magnet in the device. FWIW.
juiceppc said:
I've heard that the keyboard's magnet is much stronger than the magnet in the device. FWIW.
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Just tested it, and I can confirm that the keyboard magnet is very much stronger than the device's.
I will test a parking ticket with just the magnet device and try to deliberately wipe out its data later and report the result later.
I too am a little concerned about the magnet but don't see myself carrying around that keyboard since it makes it bigger. Also the screen on the Advantage is so big using a on screen keyboard like PCM should be fine. No?
juiceppc said:
I too am a little concerned about the magnet but don't see myself carrying around that keyboard since it makes it bigger. Also the screen on the Advantage is so big using a on screen keyboard like PCM should be fine. No?
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Click to collapse
Using on-screen keyboard works better for me. As long you choose the on screen keyboard wisely, you should have enough real estate left to still see what you're doing. I stay away from the full screen keyboard of course. Very large ones like Finger Touch, the iphone skin of Resco, Tengo Thumbs Touch Pal, are all too big. I use Resco default skin and Tengo Nano.
Without the keyboard, tt's easire to slot this GPS into my device holder in the car without case and keyboard.
I did test it on a parking card and yes, the parking card now does not work. So, I took my associates employee badge (with magnetic strip), Put the keyboard on it for about a half hour...Now he needs another badge...So the keyboard must have a strong magnet. Although, I carry my athena on my side in a carrying case right next to my wallet and have never had any problems with my credit cards, etc...So ican it needs direct contact for a while, not the occasional wave over, etc....
eagle 1 said:
I did test it on a parking card and yes, the parking card now does not work. So, I took my associates employee badge (with magnetic strip), Put the keyboard on it for about a half hour...Now he needs another badge...So the keyboard must have a strong magnet. Although, I carry my athena on my side in a carrying case right next to my wallet and have never had any problems with my credit cards, etc...So ican it needs direct contact for a while, not the occasional wave over, etc....
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Click to collapse
Holy ****! Can you do a test on the magnets on the device?
eagle 1 said:
I did test it on a parking card and yes, the parking card now does not work. So, I took my associates employee badge (with magnetic strip), Put the keyboard on it for about a half hour...Now he needs another badge...So the keyboard must have a strong magnet. Although, I carry my athena on my side in a carrying case right next to my wallet and have never had any problems with my credit cards, etc...So ican it needs direct contact for a while, not the occasional wave over, etc....
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OMG, what in the hell were the engineers at HTC thinking while designing athena?
kdskamal said:
OMG, what in the hell were the engineers at HTC thinking while designing athena?
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I know. The lack of an earpiece and the implementation of those magnets keeps this from being the "perfect" device IMHO.
http://science.howstuffworks.com/magnet4.htm
http://www.pcworld.com/article/id,116572-page,1/article.html
kdskamal said:
OMG, what in the hell were the engineers at HTC thinking while designing athena?
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I really don't think there is anything wrong with the Athena Magnets. I have had mine for many months, and have never accidently had any issues due to the magnets. Yes, I have used them intentionally to try and mess up parking cards, employee badges, etc. but overall, seems to work well to attach the keyboard. ANd a lot of pouches and cases have used magnets for years.
Destroying card info. yes but not strong enough to wipe out the hard drive. Just in case you are wondering there is huge magnet motor reside in your hard drive.
Rudegar said:
http://science.howstuffworks.com/magnet4.htm
http://www.pcworld.com/article/id,116572-page,1/article.html
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Click to collapse
May be some of the parking cards are more fragile to magnets then
But now atleast I'm less worried about the magnets
PS: the earpiece thing aint going to bother me. I'll be buying myself a SE K850i for tele communications
Just get an audio addaptor to go from the mini USB to 3,5MM socket if you want headphones wired to the device - works a treat - Mike
Something odd I noticed a week or so ago. When my tab is charging, if I run my finger lightly along any part of the metal case, there's a REALLY faint "vibration" or "tingle", reminiscent of the feeling you get when you put one of those 9V square batteries on your tongue.
If I disconnect the charger then it stops, so I figured there must be some kind of short in the tablet somewhere.
But I finally found my multimeter this morning and tested it. There is absolutely no current in the casing at all. 0.000 volts. 0.0000 amps. Nada. Zip.
So what the hell IS it? I don't think it's the internal vibrator as I can't hear anything. Is anyone else getting this? It's strongest around the middle of the device, around where the Acer logo is on the back, but can only be felt on the metal parts, not the glass...
It might be an electro magnetic induction current, and the plastic is insulating the metal from earth - you are then providing the earth to make the circuit.
Where did you measure from and to with the multimeter? Try case to earth on another power socket, or case to earth with your tongue (wet, very conductive) (wet fingers if you's scared.. LOL).
I tried all the ways I can think of, including those, but there's nothing I can pick up with my meter. Alas, my scope is broke.
My wife can't feel it at all, but my kids can so I'm positive I'm not imagining it. It's not there when unplugged from the charger, there when plugged in.
BTW, generally, water is a very poor conductor of electricity, especially through the tongue as saliva has a pH of 7.5, which will insulate rather than conduct. You need water with a pH of <5 or >9 for decent conductivity.
Don't worry, I can feel the same vibration with my HTC Desire (which has a metal case, too), funny enough not with my A500, though. Not everyone can feel it, which either means not every device has that effect or not everybody can feel it.
True, but it's still better than dry skin, especially finger print tipped fingers.
Fluffbutt said:
True, but it's still better than dry skin, especially finger print tipped fingers.
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Nope. With wet fingers (saliva or tap water) I can't feel the vibration at all, with dry I can. This tells me it MUST be electrical, but I'm damned if I can get it to register on my meter.
BTW, though I've not done much in the last 20 years, I originally trained as a microelectronics engineer, so I do know what I'm doing. I've never seen this in a device that DIDN'T register some kind of current flowing through it...
I've always been pretty sensitive to tiny electrical currents, so it probably IS some kind of short that my fingers are picking up, but can't get through the anodised coating on the metal back for my meter to read it. I AM getting a tiny reading of 0.003722 volts on the bare metal in the dock port, but my fingers sure shouldn't be able to pick THAT up!
Still, with no readable value on a meter, there's no way I'll be able to return it as the store just won't believe me, so I guess I'll live with it and just check it periodically.
I have exact the same thing, when the A500 is charging and I'm touching the case, it is vibrating a little.
I got my A500 since friday. I registered same vibration during the first charging. I don´t know what to do with it....
E.
Yeah I noticed this too. The list of quirks with this tablet just seems to grow by the day
i have the same issue before, i changed the power adapter from Acer and the problem solve. Their report log show 'electrical leaking'
I truly don't doubt what you say.
I honestly would've though that wet skin would be better than dry or skin-oil skin. Weird.
See if you can get a infinite resistance reading between the metal shell part and the dock port (like you should). I also suggest a separate test of the charger unit for leakages.
Maybe also test the charger port and the dock port for max resistance, charger port and skin as well.
OK, it's probably not dangerous (well, maybe not now..), but it IS bloody interesting!!
FloatingFatMan said:
Nope. With wet fingers (saliva or tap water) I can't feel the vibration at all, with dry I can. This tells me it MUST be electrical, but I'm damned if I can get it to register on my meter.
BTW, though I've not done much in the last 20 years, I originally trained as a microelectronics engineer, so I do know what I'm doing. I've never seen this in a device that DIDN'T register some kind of current flowing through it...
I've always been pretty sensitive to tiny electrical currents, so it probably IS some kind of short that my fingers are picking up, but can't get through the anodised coating on the metal back for my meter to read it. I AM getting a tiny reading of 0.003722 volts on the bare metal in the dock port, but my fingers sure shouldn't be able to pick THAT up!
Still, with no readable value on a meter, there's no way I'll be able to return it as the store just won't believe me, so I guess I'll live with it and just check it periodically.
Click to expand...
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Fluffbutt said:
OK, it's probably not dangerous (well, maybe not now..), but it IS bloody interesting!!
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Click to collapse
I really doubt it's dangerous, but it does indeed sound like there's leakage current on OPs tab. I've had similar experiences with e.g. some PC cases and there the problem was easily solved by making sure the case is well-grounded. Also had a washing machine that did the same, but as there's water involved I had to check it out properly and it was indeed a defect unit and had to be thrown out.
I get the same, both on the case, and when i run my finger over the glass, makes it tingle slightly, unplug the charger and wherever i touch its gone. perhaps from the screen getting the full V/amps from the charger?
I'm glad not to be the only one experiencing this so called "electrical leaking".
But it seems I am the only one who actually enjoys this feeling on my fingertip. Don't you?
pintness said:
I'm glad not to be the only one experiencing this so called "electrical leaking".
But it seems I am the only one who actually enjoys this feeling on my fingertip. Don't you?
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!!!!!!!
If you try another part of your anatomy on the screen, DON'T post the video!!
LOL!!
;->
I get the same vibration but on the bottom edge of my a500 .....strange.....
Sent from my XT720 using XDA App
lol
My advice would be to *not* lick / taste your a500 while it is charging
me too
The cases is hot with respecs to earth. The adapter needs replaced.
Mine dont do that.
Sent from my A500 using XDA Premium App
I noticed this too when I first got my A500. I don't notice it anymore because I always have it in the Folio Case.
I'm using an Element Recon Carbon Fiber case and while I really like it, the carbon fiber seems to weaken nfc. I had a couple tags in my car and room that I can't seem to use anymore. Do things like these external antennas (http://www.amazon.com/ipartstore-Ant.../dp/B00DE76XNY) or similar ones work at all? Its not really a dealbreaker since I still like the case, but I was just looking around if there was a cheap fix available.
pinoysw1mmer said:
carbon fiber seems to weaken nfc.
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Carbon fiber is a lossy conductor, so it will reduce your NFC range. Thick cases are also problematical. You should consider using a thin plastic or rubber case. Or no case if NFC is important to you. Also orientation is also important, so the position that you hold the phone can help achieve a successful read.
The maximum coupling and therefore range is when the two antennas are parallel. So if you have trouble with a transponder (reader), hold your phone in direct contact with the NFC pad. Level, with the center of the battery door oriented over the pad and hold it stationary for a few seconds if necessary.
I can't think of anything plausible that you could do in software. Phones already use an efficient spiral loop antenna. About the only other thing that you can do is use an external antenna as you alluded to. This could be a solution for you provided that you are willing to not use your battery door and therefore lose your water resistance. If you have a good mechanical aptitude you could possible route the leads through the battery door to an external antenna with a water tight seal. But that would be outside the capabilities of most end users.
The easiest way to increase range is from the POS end, which isn't in your control. Each new generation of transponders are more efficient and tend to increase range. And thieves have been known to hack transponders with much higher, illegal power levels that can capture your NFC information from several meters.
.
So I just grabbed my phone and saw a staple attached to my camera lens! Somehow the camera appeared to be magnetic right on the lens!
Now I'm worried a little bit because this could potentially scratch the lens since it's attracting ferromagnetic metals.
Is it common or just happens to be only my unit?
Mine is the same, I think is the stabilization system that uses electromagnets. Or the auto-focus...
I use a magnetic car mount and if place it too high it will start distorting the camera. I now understand why
Sent from my Nexus 6 using Tapatalk
kekinash said:
Mine is the same, I think is the stabilization system that uses electromagnets. Or the auto-focus...
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Interesting. Didn't think the magnet would be so strong in that little camera unit.
Nexus 5 had the same issues.
Most phones have a magnet around the camera, they also make this little magnetic len's to add filters and zoom, not sure if they are even being made anymore, i just remember them on the OG Evo.
kekinash said:
Mine is the same, I think is the stabilization system that uses electromagnets. Or the auto-focus...
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Click to collapse
That is correct on both. Permanent magnets, and voice coils are used for near instant precision placement of the sensor, and lens.
Riktar said:
I use a magnetic car mount and if place it too high it will start distorting the camera. I now understand why
Sent from my Nexus 6 using Tapatalk
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My first nexus 6 was damaged somehow and u believe it was caused by my magnetic car mount. Is thinking it was related to the magnets used for the wireless charging but I'm not sure. The screen started getting distortion and after a few days was no longer displaying anything but slight background colors.
Sent from my Nexus 6 using Tapatalk
gkyoungg said:
My first nexus 6 was damaged somehow and u believe it was caused by my magnetic car mount. Is thinking it was related to the magnets used for the wireless charging but I'm not sure. The screen started getting distortion and after a few days was no longer displaying anything but slight background colors.
Sent from my Nexus 6 using Tapatalk
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Click to collapse
There are no magnets for wireless charging. It's a copper coil. Your issue has nothing to do with magnets. Sounds like having it sit in the heat on a car mount ruined your screen.
Never left nexus 6 in the car. Also my og moto x has been sitting in this car for ~4 months either in the dash mount or center console since I use it as gps for work. Still rocks like the day I got it almost 3 years ago...
I bought the nexus 6 used from swappa, no idea why it fried but I had a suspicion. Looks like I need to go deeper.
Sent from my Nexus 6 using Tapatalk
Likely what happened in the previous owners hands then. Heat murders these things. They can handle their own heat, but external heat is terrible for them.
Happens on the bottom of the phone too. I find it less likely to be the camera and alot more likely to be the big speaker magnet directly on the other side of it.
The camera len has magnet.Because it has OIS
graydiggy said:
There are no magnets for wireless charging. It's a copper coil. Your issue has nothing to do with magnets. Sounds like having it sit in the heat on a car mount ruined your screen.
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When current is passed though a coil of wire it creates a magnetic field. It's how electro magnets, electronic motors, and how wireless charging works.
http://www.ibiblio.org/kuphaldt/electricCircuits/DC/DC_14.html
How wireless charging works: http://www.livescience.com/50536-what-is-wireless-charging.html
Luxferro said:
When current is passed though a coil of wire it creates a magnetic field. It's how electro magnets, electronic motors, and how wireless charging works.
http://www.ibiblio.org/kuphaldt/electricCircuits/DC/DC_14.html
How wireless charging works: http://www.livescience.com/50536-what-is-wireless-charging.html
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Click to collapse
True, but the magnetic field power is negligible. And it's not actually a magnet. Just a tiny field of magnetic energy. I am very familiar with induction and inductive charging.