Hi!
Have anyone tried it out or is it a big bs?
I call bull****. It looks like the normal NFC sticker located inside your phone on the rear panel. If this were true you should already be able to charge your phone with QI chargers. I don't see any extra connectors, and I don't think it would be possible to charge your phone through the NFC pins.
AFAIK Qi charging works by leveraging a magnetic coil (please correct me if I'm wrong) and I don't see a coil in this "add-on" so I also call BS
Quad_Plex said:
AFAIK Qi charging works by leveraging a magnetic coil (please correct me if I'm wrong) and I don't see a coil in this "add-on" so I also call BS
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You are 100% correct.
Wireless charging needs a coil as it's charging through induction after all. What's being advertised is purely an NFC plate (if it were both it would've required a second set of connectors too).
Related
Why isn't there an inductive case that charges the phone through the pogo pins? I know that the is a mod to do this yourself, but why isn't a professional one available?
Sent from my Xoom using xda premium
kiter86 said:
Why isn't there an inductive case that charges the phone through the pogo pins? I know that the is a mod to do this yourself, but why isn't a professional one available?
Sent from my Xoom using xda premium
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Well, here's your chance to make millions.
Sent from my Galaxy Nexus using XDA
Sounds like a great idea but it might be hard to design a case that keeps constant contact with the pogo pins without damaging them when pressure is applied to the case. Would probably have to use some spring pogo pins which would result in a pretty bulky case (on that side at least)
Didn't think of that. That might be a problem. Still, I think that gnex accessories are seriously lacking. (car dock) wtf
Sent from my Galaxy Nexus using xda premium
Actually, if it were a case, it would fit snugly enough that you wouldn't need spring loaded contacts. Any sort of metallic contact would do, however thin. I like this idea.
I saw this in another forum
http://forums.androidcentral.com/ve...d-palm-touchstone-no-soldering-phone.html#anb
I can see several problems:
Charge speed:
Without proper signalling, the pogo pins will only charge at USB rates. meaning restricted to 500mA. The phone comes with a 1 amp charger for a reason. We are just now decoding the signalling here in the forums, an IC and Voltage regulator are needed. This would make for a pretty thick case.
NFC tags:
I'm not 100% sure on this, but would think that the charging coil will block the NFC from working properly.
USB:
When the phone is charging with the pogo pins, the USB port is disabled, they are exclusive of each other. Might not be so much of a problem, but still something to keep in mind.
Matridom said:
I can see several problems:
Charge speed:
Without proper signalling, the pogo pins will only charge at USB rates. meaning restricted to 500mA. The phone comes with a 1 amp charger for a reason. We are just now decoding the signalling here in the forums, an IC and Voltage regulator are needed. This would make for a pretty thick case.
NFC tags:
I'm not 100% sure on this, but would think that the charging coil will block the NFC from working properly.
USB:
When the phone is charging with the pogo pins, the USB port is disabled, they are exclusive of each other. Might not be so much of a problem, but still something to keep in mind.
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Charging: You would need to use a modified kernel like Franco's - not an easy sell for a company looking to mass-produce these cases.
NFC: When I did my case mod I slid the coil up a bit so about half of the battery was not blocked. The NFC works fine. NFC will NOT work while charging b/c of electrical interference, so do not put an NFC tag on your charger base.
Also, those pins are small which makes it tricky to make & keep contact with the case. I ultimately popped the back & ran 2 stripes of copper tape to the outside of the phone, covering the pins. This gave me a pair of 1/4" x 3/4" contact points. The copper tape in the case makes solid contact & life is great. The tape pieces are hidden by the case.
I know nothing about qi or wireless charging, so don't laugh if im asking too much but I just recently bought a Kenu Airframe for my car, and I love it! Very minimal. its nice. I was wondering if its possible to make your own qi charger, and whats the smallest it would have to be for qi devices (such as nexus 5) to successfully charge to it? I am planning a project soon to install a charger, and Bluetooth receiver inside my dash in my car, and so I wont mind hiding the internals for a qi charger on the inside of the car if its possible. My idea was something almost as small as those nfc stickers, but for qi charging, where the actual charging part could be the slim "nfc sticker" size, with the actual qi parts hiding under dash. is this possible?
unvaluablespace said:
I know nothing about qi or wireless charging, so don't laugh if im asking too much but I just recently bought a Kenu Airframe for my car, and I love it! Very minimal. its nice. I was wondering if its possible to make your own qi charger, and whats the smallest it would have to be for qi devices (such as nexus 5) to successfully charge to it? I am planning a project soon to install a charger, and Bluetooth receiver inside my dash in my car, and so I wont mind hiding the internals for a qi charger on the inside of the car if its possible. My idea was something almost as small as those nfc stickers, but for qi charging, where the actual charging part could be the slim "nfc sticker" size, with the actual qi parts hiding under dash. is this possible?
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http://www.ifixit.com/Teardown/Metrans+MWT01+Qi+Wireless+Charger+Teardown/13532
look at a Qi charger teardown
the circuit board probably contains voltage/current regulation stuff along with other stuff, can hide it anywhere
you'll simply need to miniaturize that coil, probably similar to how NFC tags look like... there is some current output, range and efficiency relationship on how you choose the coil size, material, length, radius etc
paperWastage said:
http://www.ifixit.com/Teardown/Metrans+MWT01+Qi+Wireless+Charger+Teardown/13532
look at a Qi charger teardown
the circuit board probably contains voltage/current regulation stuff along with other stuff, can hide it anywhere
you'll simply need to miniaturize that coil, probably similar to how NFC tags look like... there is some current output, range and efficiency relationship on how you choose the coil size, material, length, radius etc
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jesus, that's all there is to it!? this is exactly what I was hoping for! Would it be safe to assume nearly all qi chargers are built similar then? if that coil is any indication, you just might be right. I have a feeling though that the coil is that big for a reason. My guess is smaller might reduce power output, but if its the same concept, ill pick up a cheap charger on ebay to tear apart and play with, just to test it.
Here is the Kenu Airframe for anyone interested:
http://www.kenu.com/products/airframe
if you like small mounts, this sucker is really well built. price might be a bit much for some, but believe me, its worth it.
my idea is to use the small center "Kenu" plate in the middle of the mount for qi charging. One could make the coil somehow on the airframe, possibly in the size of a NFC sticker, and have it wired into a micro usb port on the back of the airframe mount. then on the qi charger size, where the coil is, wire that with a micro usb cord, and simply attach the two cables together. This would allow for any possible adjustments if you wanted to move the mount around.
EDIT: hmmm, a quick google search found this:
http://www.mouser.com/new/Wurth-Electronics/WE-WPC-Coils/
is qi charging really just a basic charger, just with a magnetic inductive coil instead of micro usb cable? is it really that simple?
The coils are specified by the Qi spec. i.e. you can't just use an arbitrary loop of wire. But, it should be relatively trivial to break open a charging pad and put its guts in a new housing.
Working from scratch, however, is complicated and fraught with peril. You'd have to get a chip (like IDTP9036) and wire it up. And no, actually "wiring" it won't work, you'd have to make a circuit board for it to live on.
sciguy125 said:
The coils are specified by the Qi spec. i.e. you can't just use an arbitrary loop of wire. But, it should be relatively trivial to break open a charging pad and put its guts in a new housing.
Working from scratch, however, is complicated and fraught with peril. You'd have to get a chip (like IDTP9036) and wire it up. And no, actually "wiring" it won't work, you'd have to make a circuit board for it to live on.
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well, what I mean is, can you essentially use a regular wire, inbetween the qi coil, and the qi charging component itself? in the link provided by paperwastage, it looks as though all the qi charger itself basically is, is the qi component hardware itself, with the qi compatible inductive coil soldered in. by that concept, I am asking if you could TECHNICALLY add a regular wire between the coil and components, to essentially extend where the actual coil itself can be placed and used?
unvaluablespace said:
well, what I mean is, can you essentially use a regular wire, inbetween the qi coil, and the qi charging component itself?
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You could likely add small extensions to the coil. Though, I don't have enough experience with them to know exactly how much. Personally, I would be wary of adding more than an inch or two to each end. However, you could always experiment and see what works...
Qi help
the distance between the coil and the output board, is going to effect how much power is lost internally.
the size of the coil, the wire size, the wrap (basically anything that affects the field strength) will effect the efficiency.
you'll note alot of the Qi pads out there use 2A draw to power them, but only transfer power at between 500-1000ma....and they only guarantee the lower limit. (i'm guessing because of production variations, like how accurately the coiling is laid down, whether the copper wire had high or low contamination the day it was drawn, etc)
this is where knowing the Qi spec, and tuning your antenna coil comes into play.
all that being said, GL !
I was doing some reading here and there, bought a few cheap qi coils and pcb boards. I was trying to request a sample of TI's new PCB board/coil that does not require magnets(so we can continue to use NFC, and possible compass issues.), but when I tried to request a sample their website would glitch out, may try it again sometime soon.
Did you get anywhere with this? I am trying to extend the distance between the PCB and coil and am unsure of what cable to use.
Anyone using wireless charging on the MI3? It's only possible with a receiver, btw, it's not built in.
Wireless Charging
reneftw said:
Anyone using wireless charging on the MI3? It's only possible with a receiver, btw, it's not built in.
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I am curious has anyone tried using a wireless charging add on and know if it works properly?
I'm a writer for Qiwireless.com and I use my Mi3 with a universal wireless charging receiver to charge it.
I saw something here: facebook.com/MiuiCzechSlovakXiaomi/posts/10152284167068959
Manufacturer named Lencow doing this type of chargers for MI's. You can find the net for the price.
is it for real that mi3 supports wireless charging??
sdnavale said:
is it for real that mi3 supports wireless charging??
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Note, WITH a receiver. A receiver is a piece of hardware which sits under the base of the phone, and is connected to the charging circuit. Just google the term.
You'd have to be really motivated to take your phone apart, just to attach that. Without considering the space that module would need vs the available space inside the phone, which is pretty slim to start with. Actually with a metal phone back, I believe the module would have to sit outside of the phone, between the plastic cover and the back - so the phone back would not be flat.
I have had a Nexus 4 with wireless charging for the last 2 years, and I rarely use the wireless charger I bought:
- charges slower than a wall charger
- if you pick the phone up - as we all do - you stop charging and additionally multiply the number of charging cycles.
Cables are not as cool as a Qi pad, but a Qi pad also needs its cable...
Anyway, out of the box, the mi3 doesn't do wireless charging - just confirmed that with my wireless charger
stupid!!! pls improve yourself bout the 'Electronic Science and Technology' knowledge~ don't ask such an idiot question!!!
I bought a sticker to enable wireless charging for the G4, however I noticed that the sticker covers up the existing 2 contacts on the NFC that came as part of the plastic back. I'm not against installing the sticker to add QI charging, but I'm concerned that it blocks the contacts to the NCF which is already present. I assume others have used the same stickers to add charging and what to know what they had to say on the matter.
Thanks,
ERIC
egandt said:
I bought a sticker to enable wireless charging for the G4, however I noticed that the sticker covers up the existing 2 contacts on the NFC that came as part of the plastic back. I'm not against installing the sticker to add QI charging, but I'm concerned that it blocks the contacts to the NCF which is already present. I assume others have used the same stickers to add charging and what to know what they had to say on the matter.
Thanks,
ERIC
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I just purchased the same QI charging sticker and it has NFC built into it. You have to remove the current NFC sticcker in the case backing and replace it with the QI wireless charging and NFC sticker. The QI charging sticker should have the contacts where the NFC connectors are and also have the contacts for wireless charging, this is why the stock sticker needs to be removed.
Enjoy your wireless charging
StarKiller4011 said:
I just purchased the same QI charging sticker and it has NFC built into it. You have to remove the current NFC sticcker in the case backing and replace it with the QI wireless charging and NFC sticker. The QI charging sticker should have the contacts where the NFC connectors are and also have the contacts for wireless charging, this is why the stock sticker needs to be removed.
Enjoy your wireless charging
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The back sticker consists of 2 parts the NFC and also a black lump under it, which I assume needs to also be removed, no instructions make figuring this out fun! Found a picture on Amazon, as to the order of the stickers: QI first then NFC, seemed backwards, but that is what they showed., so that is what I'm doing
As for the sticker it is on and seems to be correct, but the charger does nothing, tried removing it replacing it I'm 99% sure it is correctly placed, but there is no way to check 100%; added some paper behind the contacts to move them forward, still no charging.
Assumed the sticker was bad, I bought 2 tried the second one same thing, tried both bases and both stickers (destroyed the one removing it), still nothing. So either the phone is bad unable to charge via QI, the stickers are reversed, unlikely given it matches pictures or it does not make contact, there is no way to be sure but I'm 99% positive they align. I do not really need QI, just thought it was nice, but currently I'm about to give up on it since the sticker simply do not seem to work and buying a case with it makes no sense.
Using a meter resistance is 0.06 Ohms, when off the QI, on the QI there is a pulse occurring so I assume that means the sticker is good, as a result I do not know what is the issue I do not see any way to monitor how much amperage is produced, perhaps it is too little to register with the phone as a charger?
My thoughts to date, QI via add-on sticker is a waste!, a very cheap waste but a waste ensuring proper contact is basically down to luck, and I'm not having any a 5 minute job has taken an hour of my life so far with no result to show for it.
ERIC
I bought 2 stickers from Aliexpress, rebuild 2 Phones with the sticker, both of them are workin and charging flawless
we have the Black leather back, the embedded sticker in the cover must be removed to succuess.
on the back of OP2 there are 2 terminals which apparently connects to the battery terminals since the voltage between these terminals are similar to the battery voltage. Now can these terminals be used with some QI recievers to make the charging wireless.
suchiqaz said:
on the back of OP2 there are 2 terminals which apparently connects to the battery terminals since the voltage between these terminals are similar to the battery voltage. Now can these terminals be used with some QI recievers to make the charging wireless.
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No, I don't think so. I believe those are antenna terminals as I've seen then on the backside of some internet dongles.
These pins are for letting H2OS know which styleswap cover is attached, so that it can automatically change the theme.
https://www.reddit.com/r/Android/comments/3fmkb5/oneplus_ama_postlaunch_edition/ctpxy15
Afaik, they can't be used to charging. More info is here:
https://forums.oneplus.net/threads/usb-type-c-qi-wireless-receiver.378404/
As mentioned those pins can't be used to charge the phone, although the last month many qi type-c receivers have appeared which will be able to charge the op2 at 1Amp only. Mine is on the way, I will report back when I get my hands on it.
Sgmaster said:
As mentioned those pins can't be used to charge the phone, although the last month many qi type-c receivers have appeared which will be able to charge the op2 at 1Amp only. Mine is on the way, I will report back when I get my hands on it.
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Any update , after using Qi type c receiver from your end?
yo
interested