Is there any way to extend the distance my phone can communicate with nfc devices? Right now I need to be within an inch or less it seems but I'd like to extend that to around 5 inches if possible?
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Interesting article
In theory, yes, it could be done. The challenges are that NFC uses a relatively low frequency (13.56 MHz), which requires a longer antenna (22 meters). The second is that NFC tags are powered by the reader, so the signal at the tag has to be powerful enough to activate the electronics.
I wonder if you put the tag at the focus of a parabolic antenna if you could increase the range? I'm guessing not by much, since the power transfer is over the magnetic field (like a transformer).
wouldnt this also increase the security issues? at one inch its really hard to get the phone to detect anything unless YOU want it to..at 5 inches, a person standing next to you could do it.
I think one would have to have more turns of coil and more power, but what I don't know is if the coils are "tuned" to a certain frequency
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The coils are almost certainly tuned to the 13.56MHz radio frequency. The issue is that the power is transmitted by a magnetic field. More coils helps that at the expense of the tuning.
Check this NFC Extenders that would help
Check this NFC Extenders that would help
It has two NFC patch kit, one is for NFC smart phones, the other one is for NFC tags.
It could extend the NFC reading. Contact info @getsmartcard.net
Related
Is there a way to mod the internal
Antennae to boost WiFi and/or gsm signal?
Sent from my HTC Liberty using XDA App
antenna design is a very specific thing. It's not a matter of just making it longer, or slapping on some extra wire to improve; the antenna needs to be a specific length for specific frequencies.
However, since the antenna (at least for GSM) is in the rear cover, i would think that third parties could make a replacement cover with a different antenna.
I have a Samsung Galaxy S3 which depends on the battery with a built in NFC antenna for NFC to work. I am currently using a 3rd party battery that doesn't have an NFC antenna. I would love if there is an option to somehow add an antenna externally, but not through the use of a microSD card if possible. Does anyone have any suggestions? Thanks!
Doubt it. NFC isn't just a matter of adding an antenna afaik.
pcorlatan said:
I have a Samsung Galaxy S3 which depends on the battery with a built in NFC antenna for NFC to work. I am currently using a 3rd party battery that doesn't have an NFC antenna. I would love if there is an option to somehow add an antenna externally, but not through the use of a microSD card if possible. Does anyone have any suggestions? Thanks!
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It would be really be more feasible to just buy a different battery with NFC support. Trying to add an NFC antenna to the phone would be a lot more work than it's worth.
JunyuT. said:
Doubt it. NFC isn't just a matter of adding an antenna afaik.
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I assumed the rest of the required hardware is built into the phone and just the antenna in the battery, but then again the antenna probably needs to receive power so I can see how that would be an issue. Thanks for your input.
TWO515TY said:
It would be really be more feasible to just buy a different battery with NFC support. Trying to add an NFC antenna to the phone would be a lot more work than it's worth.
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Okay thanks, it's not too big of a deal to throw in an NFC battery when I need the functionality.
S3 need a antenna?
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tuansiro said:
S3 need a antenna?
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Just as much as any NFC-enabled phone does... You know that the antenna is embedded in the inside of the phone, right?
Damastus said:
Just as much as any NFC-enabled phone does... You know that the antenna is embedded in the inside of the phone, right?
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Actually on the SGS3 the NFC antenna is in the battery, not the phone.
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Actually I knew that since it was stated in the first post. I consider that still inside the phone.
I thought the user I answered to imagined something like this here as an nfc antenna.
While technically yes, you could make an antenna out of say aluminium foil if you could figure how to cut it so you end up with a tuned antenna, then connect it to the correct pin on the battery connector, I think any sane person would just stick an NFC battery in.
I think they put the antenna in the battery because it's up close to the back of the case. That would also keep it well away from the other antennas that I doubt would like the power pulses that NFC puts out while it's polling.
Oh and Damastus, that picture it hilarious.
I've done the wireless charging mod using Palm Pixi guts. That thin coil of wire is enough to break NFC communication, depending on where it's put. NFC has a VERY short range, so I'm sure it's in the battery to put it as close to potential NFC chips you want to read, and to minimize anything else getting between the antenna & chip (like cases, batteries, etc.)
TWO515TY said:
It would be really be more feasible to just buy a different battery with NFC support. Trying to add an NFC antenna to the phone would be a lot more work than it's worth.
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On the Nexus S, the antenna is built into the phone's backplate.
In theory, you could buy a Nexus S back, remove that antenna, and put it on the inside of your phone.
Run fine wires from the phone's NFC antenna connections to the antenna, and it might just work.
I'd expect reception to be lousy, since you'll detune the antenna by trying to connect it. This also assumes that the NFC circuitry is in the phone, and the battery has only the antenna.
sysadmn said:
On the Nexus S, the antenna is built into the phone's backplate.
In theory, you could buy a Nexus S back, remove that antenna, and put it on the inside of your phone.
Run fine wires from the phone's NFC antenna connections to the antenna, and it might just work.
I'd expect reception to be lousy, since you'll detune the antenna by trying to connect it. This also assumes that the NFC circuitry is in the phone, and the battery has only the antenna.
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Or..buy a battery with NFC support..
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I got my extended battery (4300mAh) with NFC support from a Chinese manufacturer for only $15. I know you have to be careful with those, but this one seemed legit so I took a chance and it works great - last forever - AND has NFC. Here's the one I got: http://www.aliexpress.com/item/NFC-Extended-cell-phone-battery-with-cover-for-Samsung-Galaxy-S3-I9300-4300mAh/577969392.html
just take apart an OEM battery and start playing with it. My guess is what you want to do is VERY doable.
If I recall correctly, the Verizon SGS3 inductive charging back cover has the NFC element on the cover, not the battery.
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nerys71 said:
just take apart an OEM battery and start playing with it. My guess is what you want to do is VERY doable.
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I thought about that but I don't want to waste a perfectly good battery just to try, although it's tempting.
Mutiny32 said:
If I recall correctly, the Verizon SGS3 inductive charging back cover has the NFC element on the cover, not the battery.
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I think you're right, however I'm pretty sure that's what the extra two pins under the battery are for. These pins are only on the Verizon version of the GS3 though, so it wouldn't work for my T-Mobile GS3. Thanks for the suggestion though.
buy a cheapy chinese battery that has NFC and "have at it"
As far as I have known, there is a type of NFC antenna available in the market that can be stuck to the back cover of your Galaxy S3. In this way, you can take full advantages of NFC functions of the Samsung mobile with an alternative mobile battery. However, it seems that most providers like Sunshine Good Electronics Company only do wholesales business on platforms like Globe Resources. You can search it on e-bay, maybe you will be surprised to find on retail seller.
I'm thinking about picking up a few NFC tags to setup around my dorm. From the little amount of research I've done, I believe NTAG203 NFC tags are the more current standard that is compatible with newer phones, including ours, and that 1K tags are an older type that may/may not work with the Moto X.
Is anyone using NFC tags already with our phone? Does anyone have any comments on how NFC might affect battery life?
These tags are the ones I would most likely buy: http://www.amazon.com/NFC-tags-Writ...y-Back/dp/B00CE3IC74/ref=cm_cr_pr_product_top
My NFC is on all the time. I have tags in my car, at home, at work and on my key ring. I do not notice any battery drain.
I bought these ones off of ebay.
"10pcs NXP NTAG203 NFC Stickers w/ RF Shielding, for NFC phones, Nexus 4/7/10" (XDA will not let me post the link to the Ebay since I am a new member)
They were $9.99 + $0.79 shipping.
These ones work on metal surfaces. Pay attention to the ones you buy if you are going to stick them on anything metal. The standard NFC tags do not work on metal surfaces.
I went for the Moto skip, since I figured what the heck. It comes with 3 NFC stickers and a colored NFC tag (colored of your choice, of course) that attaches to clothing with serious magnets. Pretty cool - going to try it out tomorrow but it's cool unlocking it without using a power button.
I love my NFC tags. I've had my moto less than a week so I'm not sure about battery life. lm using : NFC tags - NTAG203 Chip - 10 Pack (amazon)
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Any Type 1 or Type 2 "universally compatible" tags will work with the Moto X. NTAG203 Tags are the most affordable of those, but only have 137 bytes of usable memory. This is plenty for most task launching applications, but for some things like creating a full vCard (electronic business card) with all your info you might need more memory. Topaz 512 Tags have almost 450 bytes of usable memory and are also fully compatible with all NFC Devices including the Moto X.
Of course we have NTAG203 and Topaz 512 Tags/Stickers at AndyTags.com as well as NTAG203 Key Chains, but many other stores have them as well.
NFC uses VERY little power and has almost no affect on battery at all.
How many instructions can one 137 byte NFC tag hold at once? e.g. turn off WiFi, turn ringer to full volume and send a text message. Is that capable?
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I got some NTAG203 tags from ebay and some from the tagstand.com.. and they were fine for like 3-5+instructions. But with tasker (or llama i think) you can just up a profile or set of tasks and associate it with the name of the tag. So the tag only has to store a name and when its read it can set off an unlimited amount of tasks.
Honestly though I don't really use nfc tags, they were just a cool thing to try but not really that useful for me on a daily basis. I accomplish most stuff depending on my time and location, and the wifi network i'm connected to.
I'm planning to mount my 2013 Nexus 7 into a car dash. It will be integrated into the dash and have a plastic bezel around it. Because of this, it may effect the GPS signal a little. So i'm wondering if there is any way to extend the GPS antenna to an external one? What kind of GPS antenna does the Nexus 7 have? is it just a chip on the board? can it be extended by soldering on some wire and attaching to another kind of antenna?
You are correct in assuming that enclosing the tablet in a mount like you described will increase GPS lock time and decrease accuracy. There are such things as USB OTG external GPS antennas...
http://www.gps2003.com/android-tablet--enternal-gps-receiver#/
You can also use GPS-Bluetooth-Mouse...
quickdraw86 said:
You are correct in assuming that enclosing the tablet in a mount like you described will increase GPS lock time and decrease accuracy. There are such things as USB OTG external GPS antennas...
http://www.gps2003.com/android-tablet--enternal-gps-receiver#/
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this is actually a whole new reciever, and not just an antenna. I guess it is a possible remedy, but not exactly what was asked about. AFAIK, there is no way to augment JUST the antenna.
Well, my hope is to stir up enough interest in the kinds of modules that we think would be awesome for this phone. I mean it's awesome that we can easily repair this phone because of its "modularity" but I know I definitely was bought over on the idea of a adding different functionality to my phone; maybe specific to a certain kind of line of work or something simple like a special kind of case added functionality. LG actually has a contest going on like this but only open to native South Koreans. I don't understand why it isn't worldwide? Are we going to have to start a kick-starter?
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I was thinking maybe an extended battery case with solar panel,think true wireless charging! Or a gamepad module!
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The new modular moto is said to have a projector as one of it's modules. I was thinking a thermal/night vision cam could be cool.
i'd take the hi-fi module lol, had I known I needed the international version to even use it I wouldn't have bought it through tmo
a joypad module
a real GameBoy on our LG G5 !!!!!!
Auto root and bootloader unlock module for all variants.
There are so many features that the aftermarket could offer for a variety of different lifestyles, I don't even know where to start!!
I second the joy pad.
Also, I think a legit flashlight with dedicated switch would be pretty cool/handy.
Maybe a high quality microphone for sampling and on the fly recording for musicians.
A flip out, clamshell style physical keyboard for the texting junkies.
A simple module with a microUSB port for those with many microUSB devices that want to consolidate charging platforms.
A big fat battery that doubles as a power bank.
A serious WiFi module for hard core tethering.
A two way radio with accompanying app for those who travel off the grid.
RFID reader.
Multi card reader.
The possibilities are nearly limitless, if the phone is popular enough and the LG continues to offer the platform in future devices (or even licenses it out to other phone manufacturers if it catches on) who knows what awesome new features it could provide!!
Thermal imaging camera
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I'd take a front firing speaker and hardware buttons (with front fingerprint reader for when on desks) with just a little 200 mah battery built in to bring us to 3000 . Simple but would be epic
joshuadjohnson22 said:
I'd take a front firing speaker and hardware buttons (with front fingerprint reader for when on desks) with just a little 200 mah battery built in to bring us to 3000 . Simple but would be epic
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I think zerolemon can get us way more battery juice than that. Id like to see speeakers or the dac