How many instructions will 144 bytes handle - NFC Hacking

I'm looking at picking up some NFC tags and I have a choice of 144 bytes or 768 bytes
the 144 are quite a bit cheaper but I'm just not sure how many tasks I can fit on the tag

upparoom said:
I'm looking at picking up some NFC tags and I have a choice of 144 bytes or 768 bytes
the 144 are quite a bit cheaper but I'm just not sure how many tasks I can fit on the tag
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Using NFC Task Launcher? Quite a few. I'd recommend the NTAG203 tags for almost all uses outside of really large vCards.

Related

[Q] Wallpaper Size

if i decide to use a wallpaper that isnt a live one what size/resoultion should it be to fit perfectly?
i know there are apps out there on the marketplace for downloading wallpapers but if i wanted to make my own id like them to fit perfect
Thanks
Crucio_
Height 800 pixels, Width 960 pixels, DPI 218
This is the actual dpi of the screen so you will get best 1:1 reproduction of the image.
The width being double is for the scrolling effect that Android has.
If Touchwiz does not do this, I haven't used it enough to know. Then make the Width 480 pixels.
mr.suff said:
Height 800 pixels, Width 960 pixels, DPI 218
This is the actual dpi of the screen so you will get best 1:1 reproduction of the image.
The width being double is for the scrolling effect that Android has.
If Touchwiz does not do this, I haven't used it enough to know. Then make the Width 480 pixels.
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yeah it has that scrolling effect ^^
thanks for the info

Are these NFC Tags good?

Didn't see an NFC tag thread. I asked this in the MP Lounge but figured Nexus owners would really know since this is probably the phone most used NFC.
I don't know NFC tag specs very well, but this seems like a good deal, apparently a 4" distance read and it's "better" than "older" tech tags (whatever that means).
At $1 each, is this good? I plan to get some to play around with some NFC tag tasks.
http://www.ebay.com/itm/10-X-SMARTR...337397?pt=PDA_Accessories&hash=item3cc9b85075
ntag
orangekid said:
Didn't see an NFC tag thread. I asked this in the MP Lounge but figured Nexus owners would really know since this is probably the phone most used NFC.
I don't know NFC tag specs very well, but this seems like a good deal, apparently a 4" distance read and it's "better" than "older" tech tags (whatever that means).
At $1 each, is this good? I plan to get some to play around with some NFC tag tasks.
It's a NTAG203 type, Highest ScanStrength of all, but not one combination of Phone-Tag goes up to 4 inch. The "best" phones goes up to 2 inch (4 cm) with this type of tag. www nfc-phones.org/nfc-tags/ (About Tectiles, SmartTags, Tag+, Mifare and much much more.)
The price, $ 1,-, depends also on the amount of tags and shipping, You want 1000 pc? shop around a bit .
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joao22 said:
It's a NTAG203 type, Highest ScanStrength of all, but not one combination of Phone-Tag goes up to 4 inch. The "best" phones goes up to 2 inch (4 cm) with this type of tag. www nfc-phones.org/nfc-tags/ (About Tectiles, SmartTags, Tag+, Mifare and much much more.)
The price, $ 1,-, depends also on the amount of tags and shipping, You want 1000 pc? shop around a bit .
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No, 10 is fine, lol. Dunno what I'd do with 1000 of these.
$10 for about $12 shipped on this deal.
On this specs it says:
The SMARTRAC 38mm Bullseye NXP NTAG203 is one of the newest NFC tags available and of the highest quality. It has significantly improved performance over previous tags such as the Ultralight, Ultralight C and Mifare 1K. It offers 144 bytes of user memory and a reading distance of up to 10cm. They can be made read-only and are compatible with all (see note below regarding Sony Xperia) current NFC enabled devices and read/writers.
The reading distance of 10cm is where I got 4 inches from, is that BS?
You're saying this is a good quality one though? Is there a better deal you can point at if I just want 5 or 10 or should I just get this one?
orangekid said:
No, 10 is fine, lol. Dunno what I'd do with 1000 of these.
$10 for about $12 shipped on this deal.
The reading distance of 10cm is where I got 4 inches from, is that BS?
You're saying this is a good quality one though? Is there a better deal you can point at if I just want 5 or 10 or should I just get this one?
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For many, this ntag type is a good choice.
10 cm = 4 inch, yes, theoretical maximum for nfc. Every handset is different, I never read of a phone able to read from 2 inches. In tests, up to 40 mm is the maximum achievable distance.
I think the price is ok (shipping very cheap).
This NTAG type should work with all nfc enabled devices (mifare classic type not). Highest ScanStrength and reasonable storage.
You could also consider; what is most convenient for me? Stickers, key fob, round or square, outdoor?
I just received NFC tags from tags for droid.
I wrote a few and they work just fine. My package even came with a key fob which is awesome.
I got 10 + key fob for $15.99 shipped.
Here's the link. http://tagsfordroid.com/tags/Home.html
Sent from my Nexus 7 using xda premium

Increase pixel density on future models?

With 330 ppi already set, do you think they will increase the ppi in the future.
I mean, we have reached "retina display", so what s the point to increase the ppi further ?
I see the iPads have around 260ppi, does it mean nexus will always have a better ppi than apple?
What do you think?
swisstourist said:
With 330 ppi already set, do you think they will increase the ppi in the future.
I mean, we have reached "retina display", so what s the point to increase the ppi further ?
I see the iPads have around 260ppi, does it mean nexus will always have a better ppi than apple?
What do you think?
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of course future device will have better hardware so better display more pixel, 4k and etc
but Apple... however compatible software needs for larger screen with more density and iOS not support it so far But they can use so it seems Apples policy is not to use so high-end device !!!
x102x96x said:
of course future device will have better hardware so better display more pixel, 4k and etc
but Apple... however compatible software needs for larger screen with more density and iOS not support it so far But they can use so it seems Apples policy is not to use so high-end device !!!
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At first, sorry for my bad English.
There is NO SENSE AT ALL to increase the RESOLUTION of the display to more than 360-400 pixels per inch, for it would be a waste of hardware and resources. I say this because the human eye can resolve about 350 points per inch, only few can resolve about 400, and no one on Earth can resolve more than this. So, why a manufacturer would spend effort, time, money and hardware to make something that "is there, but can not be seen"? Forget about it.
Of course, I capsized RESOLUTION because there is a difference between resolution and screen size. Screen size, measured by the number of pixels on the x and y axis, is absolute, so it doesn't matter how big or tiny the pixels are. If I say I have a screen with, say, 4000 pixels wide, one can NOT figure out how big it is, or how crispy and beautiful are the images rendered on it, because these qualities are defined not by the number of pixels, but by the RESOLUTION instead, that is not an absolute measure, but a relative: it is a ratio between the amount of pixels and the real size (in inches, or milimeters, or whatever other measure unit used) of the screen. So, a photoghraph shown on a tiny (4") screen with 800 pixles wide can look way better than, say, if shown on a huge screen with 2000 pixels whide, but with 32" - and you need to put on the equation the DISTANCE you are from the screen. It is a complicated matter, it involves physics (optic) concepts to explain it, but you can think of it this way: your eye can tell apart two lines if they are far enough from each other, and if they are big enough. So, if a screen with high resolution (with a great number of pixels condensed in a tiny area) shows two lines that are only one pixel apart from each other, depending on the screen size and on the distance you are from the screen, your eyes can not see the two lines, but just one line instead. That's because your eye is not capable to see them as they are "printed".
To put it short: We will NEVER have a USEFULL screen with more than 400 pixels per inch. Anything more than this will be an unjustifiable waste of money and hardware. It would be the same as creating a headphone that can reproduce sounds beyond 30000 hertz or above 10 hertz - it would be useless, as our human ears can only hear sound frequences that are between the range of 20 and 25000 hz.
Sorry for the long, boring text...
This is what I m talking about.
Would be wiser to have longer battery life or faster processor than just more pixel that nobody can notice.
This is why apple stick on 260ppi
swisstourist said:
This is what I m talking about.
Would be wiser to have longer battery life or faster processor than just more pixel that nobody can notice.
This is why apple stick on 260ppi
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And again a useless Nexus/Apple comparison thread from you. Wow.
Just buy the Mini and be done with it. That is, if you don't already have one.
Are you a bat ? A human can be happy to be able to hear about 15-16kHz. If you´re one of the guys who likes to go to loud concerts very often, you can be happy if you can still hear frequencies around 10kHz
Well, about the higher resolution, it depends on the screen size. I guess 1920x1200 is good enough for a 7" Tab, you have to look very close in order to spot a pixel :angel:
piduca2011 said:
At first, sorry for my bad English.
...
To put it short: We will NEVER have a USEFULL screen with more than 400 pixels per inch. Anything more than this will be an unjustifiable waste of money and hardware. It would be the same as creating a headphone that can reproduce sounds beyond 30000 hertz or above 10 hertz - it would be useless, as our human ears can only hear sound frequences that are between the range of 20 and 25000 hz.
Sorry for the long, boring text...
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Pfeffernuss said:
And again a useless Nexus/Apple comparison thread from you. Wow.
Just buy the Mini and be done with it. That is, if you don't already have one.
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What s wrong with you.?
I make reference to Apple, could be anything else like Samsung.

NFC Tags

Does anyone know where I could find small NFC tags, that would not exceed say 5/16" x 1" ?
Thanks
I've god some really small samples from smartrac-group.com. They're about 19 x 12 mm. That's the smallest I've seen.
Amazon eBay

How is the display 806 ppi?

A 5.5 inch display at 3840 x 2160 yields 801 ppi, not 806. The display would have to be exactly 5.465 inches diagonally in order to yield 806 rounded off to the nearest whole number (both 5.46 and 5.47 will not). So why is Sony advertising it as 806?
AB__CD said:
A 5.5 inch display at 3840 x 2160 yields 801 ppi, not 806. The display would have to be exactly 5.465 inches diagonally in order to yield 806 rounded off to the nearest whole number (both 5.46 and 5.47 will not). So why is Sony advertising it as 806?
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it could be the dpi settings that the device uses
my Sony Xperia Z2 is 443 DPI but its advertised as 480 dpi and also has the dpi set to 480 in the system
perhaps the Z5 uses 806 DPI to make the UI not glitch out as it does with odd proportions when it comes to android/Sonys UI
Envious_Data said:
it could be the dpi settings that the device uses
my Sony Xperia Z2 is 443 DPI but its advertised as 480 dpi and also has the dpi set to 480 in the system
perhaps the Z5 uses 806 DPI to make the UI not glitch out as it does with odd proportions when it comes to android/Sonys UI
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Hmm possible. But shouldn't actual pixels instead of software setting be advertised?
AB__CD said:
Hmm possible. But shouldn't actual pixels instead of software setting be advertised?
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not sure, its fully legal to advertise how many pixels the device renders and/or how many the display shows

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