Hi all, I'm a forklift operator and I have a problem when I'm on my lift. I set my phone down on the tray, which is directly above the battery by about 10 inches, and the screen will randomly turn on by itself. If I'm off the lift, I don't have this problem. I'm no electrical engineer by any means, but is it possible that 2 ton, 1875 amp-hour battery is giving off enough of a magnetic field to trip a sensor somewhere in the phone? There's plenty of wires and metal, but it's really the only thing I can think of. My old EVO 3D did this too sometimes, but I chalked it up to being a bad ground somewhere along the line.
Anybody else share this issue on their lifts or similar machinery?
The nexus 5 does have the smart cover sensor so that is likely the behavior you are describing but I wouldn't have expected a fork lift to be giving off that strong of a magnetic field to interfere with it
Sent from my Nexus 5 using xda app-developers app
as alex said i dont think its the forklift....
this is most likely linked to your proximity censor...
The smart cover sensor is magnetic. It shouldn't have anything to do with the proximity sensor.
It's just weird why it's triggering your phone.
Your forklift could use some form of magnetic resistance for lowering which would might explain the triggering
Sent from my Nexus 5 using xda app-developers app
I've seen all sorts of proximity to random items trigger the hall effect sensor using magnetism. It's fairly common.
Magnetic hydraulic servos on some forklift, very strong localized magnetic fields in places.
WR
Sent from my Nexus 5
Appreciate the replies. I tested the magnetometer with STools and it does seem like there's a magnetic field towards the front of the lift. At least, the lines moved a lot more. So when you say magnetic resistance, makes sense. One more question, does anybody have any ideas of how to potentially block it? I plug into a speaker while I'm working so that's why my phone sits there. The brass gets real uppity about earbuds.
Sent from my Nexus 5 using Tapatalk
You'd need a Faraday cage or the like, then you'd essentially have no cell at all.
Grab a BT speaker perhaps, some crank out near 100 watts an can be heard easily in a small cab wirelessly.
Or a longer patch cord.
WR
Sent from my Nexus 5
Related
This may be a stupid question but do cases with magnetic closures mess up the GPS of a nexus one in anyway? I remember reading something to that effect with the G1 a few years ago but am unsure if it's true or not.
It shouldn't affect the GPS itself... It will (obviously) affect the compass though, so perhaps the orientation may be misreported. GPS works on satellite signals, not geomagnetic forces.
Thanks for the answer.
it might effect the camera, i do not have a case for my Nexus (use holster) but I had a case with a magnet clasp on the cover that effected the camera on my Nokia N97, but with the fone in a case how are you going to use the GPS ?
arimus said:
it might effect the camera, i do not have a case for my Nexus (use holster) but I had a case with a magnet clasp on the cover that effected the camera on my Nokia N97, but with the fone in a case how are you going to use the GPS ?
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Click to collapse
Good point. I didn't think of that. The camera in the nexus one, as in most modern phones, uses a piezo ceramic motor for its autofocus mechanism. While not exactly working in a similar manner to standard electromagnetic motors, they are still influenced by the magnetic field. That said, you're not going to use the GPS or camera while the phone is in the holster, and the effects should be limited to that situation.
Oh, and if it's any comfort, I work with fMRI using moderately high field strength (3T). I have walked in the room with my phone before, and even though it is tugging to the scanner in my pocket, it still works completely fine today. A typical pocket magnet is 2-4 orders of magnitude weaker (1/100 - 1/10000 the strength). It will not damage anything in the phone permanently. Either that, or I have been extremely lucky.
Thanks for the answers. I ended up going with this Seidio Innocase Case and I couldn't be happier. No magnets to ruin your phone in this case
magnets can also screw with the capacitive touch screen.
Search for my post where I made a desk and a car mount using super strong hard drive magnets. I've been using it all day every day, no effects on anything except the compass when attach to the mount. Screen, touchscreen, camera, gps, totally unaffected. Compass still works fine when not mounted.
Hello,
I got a case for my Nexus S with magnet (the only I found in my city) and I'd like to ask if there is going to be any malfunction with the screen or any of the sensors of the phone because of the magnet that the case has.
I downloaded the "Phone tester" app that tests the phone's sensors and I saw that the values of compass and magnetic field were tottaly different when I put the case close to the phone. Of course this is logical because of the magnet but I'd like to ask if there is a chance of damaging anything in the phone after long term use.
Thanks
bad_freddy said:
Hello,
I got a case for my Nexus S with magnet (the only I found in my city) and I'd like to ask if there is going to be any malfunction with the screen or any of the sensors of the phone because of the magnet that the case has.
I downloaded the "Phone tester" app that tests the phone's sensors and I saw that the values of compass and magnetic field were tottaly different when I put the case close to the phone. Of course this is logical because of the magnet but I'd like to ask if there is a chance of damaging anything in the phone after long term use.
Thanks
Click to expand...
Click to collapse
long term damage, probably not. throwing some of the sensors off, most likely. i had a case with a magnetic snap for my g1 back in october 2008, and i noticed that thew compass was always off a bit. figured out it was the magnetic snap. i havent used a magnetic case on any android phone since, havent used any case since actually. to get the compass back to accuracy, a few firm smacks on the back helped.
Hi, I've been lurking the dev section for about six months and have a rooted ds which has sampled many of the great roms available but it has developed an issue, when I make or receive a call the buzzing/vibration makes it difficult to hear the other person. When I look at the grill covering the ear speaker it looks like I can see debris behind it glistening which makes me think metal filings? This would be consistant with me working with metal in my job and accumulating filings/flakes in my pockets. Any ideas how I can get them out guys?
Thanks.
Sent from my Desire S using XDA App
The only thing i can think of without dismantling the phone, is to turn it off, take the battery out, then pass a stronger magnet than the one in the speaker, over the grill. It may take some time but maybe you could coax them out that way. Unless the filings are non ferrous of course. In which case it may need taking apart.
Sent from my HTC Desire S using xda premium
I may have to give that a try, would the magnet not damage the phone? What I don't understand is how they got in there as there are two that can be seen that are about 2-3 mm in size.
Sent from my Desire S using XDA App
randombirt said:
I may have to give that a try, would the magnet not damage the phone? What I don't understand is how they got in there as there are two that can be seen that are about 2-3 mm in size.
Sent from my Desire S using XDA App
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Click to collapse
I can't guarantee what effect the magnet would have, which is why I would turn phone off and remove battery first. The speaker itself has a magnet in as all speakers do, so in theory there should be nothing in that area of the phone that is susceptible to magetic ill effects.
If there are pieces in there too large to come back through the grill then the magnet is not going to be any good. I'd guess they've found their way in through the headphone socket then.
In which case I'd recommend taking it to a phone shop to be dismantled and cleaned out, else you'll be limited to using a hands-free kit or the speaker phone to taking calls. Plus the last thing you want are metal filings rattling around a circuit board! I know it's closing the gate after the horse has bolted, but if you get it cleaned out, I'd recommend getting this case...
http://www.amazon.co.uk/Otterbox-Commuter-Case-HTC-Desire/dp/B0043QE6SE
It offers fantastic protection, and features rubber plugs to cover the USB and headphone sockets which will prevent the phone getting full of bits from your pocket again.
Ok, thanks for the advice
Sent from my Desire S using XDA App
After taking apart the GPS antenna module(led flash cover), cleaning the antenna contacts on the cover and spring clips on phone, and SLIGHTLY bending the spring clips out for improved contact with the cover the GPS lock was back to being less than 10 seconds for initial fix and instant refix.
With such an improvement I decided to do the same procedure to the other 2. The antenna under the battery cover(clean and bend spring contacts out alittle), and the one under the sim/sd card cover(clean and bend spring contacts out a little). My WiFi signal is definitely much better at distance! Bluetooth is better as well!
It is not difficult to do at all, and the results are immediate and VERY noticeable.
Search YouTube for desire hd/inspire 4g GPS antenna cover removal so you don't f it up. Hardest thing is getting GPS cover off, and it takes all of 5-10 minutes!
Good luck all.
Sent from my Inspire 4G using XDA
Thanks. This actually increased the speed of my stock inspire and battery life.
Sent from my Desire HD using XDA
GPS FIXED!
I wanted to bump this thread, as I ended up finding this solution on another forum. I have almost always had issues getting my GPS to lock. I tried all the software based fixes, but none of them seemed to really work. I opened my antennae, cleaned/bent the pins, and now I get INSTANT GPS lock (without any software fixes installed). I strongly urge anyone with issues to try this.
Another alternative is to solder a new antennae:
http://forum.xda-developers.com/showthread.php?t=1318892
yes it is a good thing to clean the contacts and rebend them for additional contact force. That ghetto wire solder job that the person did in your link is only a hair above trying to get a gps signal while hopping on one foot. There is quite a bit of calculations that have to be done to choose antenna length and thickness in respect to the frequency it operates on. What this user did was just pick a random length of wire and connect it, and poorly soldered at that (they probably have a coat hanger coming out of their tv). This type of modification is a TERRIBLE idea and should be avoided at all costs.
But as I said, what the OP did in this thread with the cleaning, this is a good idea.
what did u clean it with?
Im looking at the silver led cover and im like how the hell you take that off I know like something needle nose pliers.
I basically just scraped the metal until it was shiny. A fine steel wool would work, or even sand paper. You just want to get any gray stuff off.
CYRAXDroid said:
Im looking at the silver led cover and im like how the hell you take that off I know like something needle nose pliers.
Click to expand...
Click to collapse
You do it from the inside .
Summary: You are going to remove the battery and then It should reach back to where the plastic cover is. From there you can push (from the inside) the plastic peach and then slide something under it to keep it propped open.
1) Remove your battery
2) You need to prop the plastic piece up from the inside of the case. You could bend the tip of a knife, or whatever.
3) You slide the "prop" inside the battery slot and you want to line it up under the plastic piece around the light.
4) From there you can "push" it up and slide something under the edge to keep it lifted (I used guitar pics). You probably want to use a couple to work your way around.
5) Remove it from the battery facing side first.
Once you have it off it should be obvious where the metal pins are. Bend them upwards, and scrape/clean them off if there is any discoloration.
Putting it back together is a little tricky. Be careful to not break any of the snaps .
Thank me if this helps!
Well I didn't do it but still thank you for posting that info
Sent from my HTC Inspire 4G using xda premium
hi guys,
not sure if you're facing this issue.
i recently bought a protective cover, and after fixing it, noticed that the device is behaving odly.
it sleeps intermittently during use (as if you pressed the on/off button) and when you press on/off to turn it back, the home button and capacitive buttons are not functional. Back, home, and the task buttons can't work... after a few minutes of on/off, then it's ok.
however, when i take it out of the protective cover, it doesn't happen.
any of you have that problem?
Thanks.
Regards,
Liang
Yeah, I've experienced this problem too. I have a case that can flip the orientation of the screen. It seems that if I flip the tablet around the capacitive buttons come back. Very strange problem. I hope they can fix it in an update.
Sent from my SM-N900T using XDA Premium 4 mobile app
Hopefully the sensitivity of the magnetic sensor that controls smart cover functionality can be reduced via a software update. Until then being cognizant of it and realizing what orientation we have to keep our cover flaps away from to keep from triggering the screen off feature is all we can do.
Some cases have weaker magnets than others.
muzzy996 said:
Hopefully the sensitivity of the magnetic sensor that controls smart cover functionality can be reduced via a software update. Until then being cognizant of it and realizing what orientation we have to keep our cover flaps away from to keep from triggering the screen off feature is all we can do.
Some cases have weaker magnets than others.
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Click to collapse
hi,
the cover i have does not have magnets.
where exactly the sensor that tirggers the sleep?
thanks.
gnilow
The sensor is approximately 1.75 inches to the right of the G in the Samsung Logo and 1.5 inches from the top edge of the tablet.
Have you run a paper clip along all surfaces of the case/cover to determine for sure that there are no magnets embedded within either side of it? Magnets used for the on/off functionality in covers are thin and hidden inside the cardboard that is within the fabric/leather linings.
muzzy996 said:
The sensor is approximately 1.75 inches to the right of the G in the Samsung Logo and 1.5 inches from the top edge of the tablet.
Have you run a paper clip along all surfaces of the case/cover to determine for sure that there are no magnets embedded within either side of it? Magnets used for the on/off functionality in covers are thin and hidden inside the cardboard that is within the fabric/leather linings.
Click to expand...
Click to collapse
thanks... but what exactly am i looking at? or is it internal?
you reckon that it's the magnet that's causing this? funny, it was a cheap case, will run through a clip along the surface and check it out.
thanks
The sensor is internal. If you pass a magnet over that spot it will toggle the tablet screen on and off.
Sent from my SM-P900 using Tapatalk