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Trying to see if theres a inductive charging accessory coming soon or if theres a way to go about it w/o using the usb port to charge at all, working on a mod for my car would like to know if htis is possible.
possible, but you'd probably lose the NFC capability.
I've juts picked up a case-mate case, and have an old Palm TouchStone back. I'm planning to canabalise the two together to fit the inductice coil into the case.
I'm waiting until we have absolute confirmation of the assignments and voltages for the pogo pin dock connectors though.
I agree that the presence of the coil could hamper the abilities of the NFC chip, but as there's precious little you can do with that, I'm not too worried!
I'll post a how-to if I do it, and it works...
This post has info about a wireless charging mod for the T-mobile variant of the i9100, so I decided to do it to our variant.
I purchased a Palm Touchstone kit (cover and dock). The back cover (palm pixie) has the inductive charging circuit, so I removed the coil stuck to it using a heat gun (be careful), and removed the four metal studs that align it to the magnets in the touchstone base dock charging station.
I have the i9100T, which is the same as the i9100 international variant. I removed the battery cover entirely and made use of the space between my hard snap on case and the battery.
I used copper foil tape (eBay) to make the copper traces. I placed route from the +5v USB connection to the battery compartment using thin strips next to the top of the resistor, leading out to toward a thicker folded copper strip that heads to the battery edge of the pcb. I soldered over the thin trace to increase the current handling capability. Another folded strip leads to the grounded chassis screw. These two connections pair with the full width strips on the case. These run to the underside of the coil circuit strip, where two small square plates are pressed onto the copper strips. I glued a very thin rubber strip to the top side to ensure the connection. The metal studs, coil and circuit are glued to the case. I'd recommend tape also for water/moisture protection.
See the photos of what I did below:
https://www.dropbox.com/sh/866jkbv5lypoxmw/ySteboQ0XF#/
Kudos! Great job mate. Will try and report how it goes..
Time to get one Palm wireless charger..
Very interesting, been looking for something like this for a while. I wonder if this could affect reception or the functionality of compass, Wi-Fi, Bluetooth, cell reception or anything else and damage it over time.
Could this also work with the coils inside the original battery cover or, if this is impossible could it work inside the extended battery cover (but without the extended battery, instead using normal battery) thus there could be enough space?
I thought about my own method, but this could be to simple: glue the coils inside the battery cover, then somehow glue or connect thin stripes from the coil to the contacts of the battery, right between the connectors of the battery and the contact ports in the battery compartment where the battery is connected to. This way, the battery could be charged through micro USB or inductive.
Do you know what I mean? Possible or too simple?
Sent from my GT-I9100 using xda app-developers app
No, I have experienced no effect on other signals. The reports from other users are the same. The only effect it will have is on the compass, due to the magnets in the charging dock.
If you use the original battery cover, it will buldge out and look like ****. It also won't sit neatly on the flat charging dock. Yes, you could use an extended battery cover also. My solution seems to be the neatest for me, as I use a protective case anyway.
Don't connect the coil directly to the battery. I'm not sure if the coil circuit even has any battery charging functionality. You are much better off supplying 5 volts to the phone's charging circuits. I can charge either via induction or micro usb, both are working fine.
you've mentioned effects on the compass. Do you mean it is only affected while on the dock or does it permanently damage the compass due to the magnets in the touchstone? If this is the case, I'd rather not think about doing it. Would it be possible to use something else instead of the touchstone, like an inductive charging mat, e.g. a powermat, Duracell myGrid or Energizer inductive charger? Thus, there won't be any magnets. Of course one would still need the palm back cover with the coil.
The presence of magnets will just throw off the built in compass, I doubt very much whether it would cause permanent damage. You would quite possibly find that the compass refused to calibrate, due to 'abnormally high magnetic field'.
The PowerMat also uses magnets built in to the induction coil units on both the receiver and base in order to ensure correct allignment.
Phil
drsoran2 said:
you've mentioned effects on the compass. Do you mean it is only affected while on the dock or does it permanently damage the compass due to the magnets in the touchstone? If this is the case, I'd rather not think about doing it. Would it be possible to use something else instead of the touchstone, like an inductive charging mat, e.g. a powermat, Duracell myGrid or Energizer inductive charger? Thus, there won't be any magnets. Of course one would still need the palm back cover with the coil.
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since it messes with the compass, would gps turn by turn have issues too ? since I have no idea if the compass is used to determin the direction for the gps.
So, I'm getting ready to look for and purchase the necessary parts to do the mod. This is just to confirm that I'm getting the correct parts.
I need some copper foil.
This back cover here: http://www.amazon.de/Pixi-Touchston...KPGU/ref=sr_1_1?ie=UTF8&qid=1353844406&sr=8-1 (Palm Pixie Touchstone Back Cover). Palm Pre back cover won't work?
And this: http://www.amazon.de/Pre-Zubehörtei...0JGY/ref=sr_1_3?ie=UTF8&qid=1354893172&sr=8-3 (HP Pre 3 Touchstone charging kit with international charger)
and this: http://www.amazon.de/Samsung-EB-K1A...HRY8/ref=sr_1_2?ie=UTF8&qid=1354716530&sr=8-2 (Galaxy S2 extended battery and back cover). I'm modifying here and use this instead of the snap on case. I hope I can fit the extended battery and the induction mod all under the extended battery cover. If there is not enough space, I'll have to use the normal battery and extended cover.
Is this all correct?
Hi mate. I'm interested in doin the same with my SGS2 inside the 2000mA cover with the 1650mA battery. I've already invested in a Touchstone cover and dock and like you I was looking to apply the coil directly to the battery. I did some research and a little poking around the four terminals on the galaxy battery with my multi meter. I'm led to believe the battery has its own circuitry for protection which is controlled by the extra terminals. How far did you get with your project, did you experiment applying the coil directly to the battery?
Sent from my GT-I9100 using xda app-developers app
sun-seeker said:
Hi mate. I'm interested in doin the same with my SGS2 inside the 2000mA cover with the 1650mA battery. I've already invested in a Touchstone cover and dock and like you I was looking to apply the coil directly to the battery. I did some research and a little poking around the four terminals on the galaxy battery with my multi meter. I'm led to believe the battery has its own circuitry for protection which is controlled by the extra terminals. How far did you get with your project, did you experiment applying the coil directly to the battery?
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
no, I didn't apply the coil to the battery for the simple reason that it makes switching the battery easier if it's empty or faulty.
However, I did not follow the exact steps in the description. As you suggested, I wanted a more elegant solution and so I stuck the coil, magnets and circuits from the palm backcover to the 2000 mAh extended battery cover and used it with the 1650 original battery.
I also did not use cooper foil but soldered small wires to the + and - pole of the Galaxy's board, these I connected to the approbiate places on the circuit inside the Galaxy extended back cover. This way I can remove the back cover and lay it next to the phone when switching the memory card, sim card or battery.
From the outside, no mod is visible at all. It just looks like the extended battery cover. Very elegant. However, due to the size of the circuits and coil, you can't put the 2000mAh battery and the extended battery together. It's just to thick. Trust me, I tried.
You can only use the coil and circuits with the standard battery and the extended cover.
If you feel good at doing this stuff, then go ahead. You won't regret it. I myself helped my dad while he was doing it because he has a soldering iron and a lot of experience with this. I didn't want to risk anything.
It's well worth it. I have the mod since Tuesday and my phone has never seen a charging cable attached to it since then (although you can still use it if you want!). It really awesome and cool. No searching for the charger cable, no plugging in and out, no tripping over the cable and knocking down the phone, no wear and tear. Just drop it on the touchstone and it charges!
The phone gets a little hotter than usual while charging but nothing serious. When charging is finished, the temperature is normal again. Lastly, it charges a little slower than with the charger cable. The phone recognizes the touchstone as USB connection so charging is 450mAh not 650mAh.
I just purchased my second touchstone from ebay so I can charge at two places without carrying around the one touchstone. This is how much I like the mod.
If I buy a new phone sometime in the future, it MUST have inductive charging built in! It's a whole new feeling. Plugging in the charger cable is so 2010
Thanks very much to the OP for the mod. It's really cool and works flawlessly!! The only thing I regret is, that I didn't do it earlier.
There is no problems with the reception of the phone ?
no, there are no problems at all! See, the back cover with the coil and the touchstone were originally released for the palm/hp smartphones pre, pixie and a bigger touchstone for the hp touchpad. All these phones have gps and everything. HP wouldn't release this if it affects their phones function's negatively. The mod just uses these parts and ports them to the S2.
Hi!
I managed to do this mod with extended cover + 2000 mah battery :laugh:
Got the (-) from the sim-card holder
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The contact between battery cover and phone is still under dev :silly:
kasarona said:
Hi!
I managed to do this mod with extended cover + 2000 mah battery :laugh:
Got the (-) from the sim-card holder
The contact between battery cover and phone is still under dev :silly:
Click to expand...
Click to collapse
very smart to use the mold on top of the SIM card holder and put the circuits there. Should have thought about that earlier! I glued them to the inside of the extended battery cover and used little wires so that I can remove the back cover, memory card, SIM card and battery if necessary without affecting the mod.
I have now the extended back cover + induction mod + standard battery. Looks nice and original. The icing on the cake would have been the extended battery included as well.
Anyways, keep it going. I hope to see the final result. Trust me, inductive charging is so cool and convinient.
Thanks vry much:good:
thanks
What happenes when I put the phone on touchstone and plug a USB cable in? Does USB charging "override" inductive charging?
What happenes when I put the phone on touchstone and plug a USB cable in? Does USB charging "override" inductive charging?
Click to expand...
Click to collapse
Good question but as my mod use usb socket I am not able to check
Sent from my I9100 @syiah5 using xda premium app
I don't advise doing both as the S2 doesn't recognise wireless charging like the S3. Your effectively doubling the input current which as I experienced lit the screen brightness up vastly for a split second until I broke the connection. I was lucky not to cook mine as is it still works.
Sent from my GT-I9100 using xda app-developers app
Awesome Idea!! Will probably try it by myself but ill use the extended Battery i think the cover has still some space to loose
Question, how thin is the solution? more than 2 millimeters?
What happens if we "increase" the usb charging speed via custom kernel to 650 ma ?
Does it work?
Thx for sharing!
I was looking at some threads and noticing that there are a couple of makers in China that sell Qi receiver "inserts" - it looks to me like those are the exact same as the SG3 ones, only with a bit more "padding" to get the spacing right - I was wondering if anyone sells just the circuit board (that is thin enough) such that I could add my own coils to it (and ideally use more of the space available), to increase the charging rate and the "sweet spot" on charging pads - does anyone know who sells such a thing and if it would work in theory? (2 coils), or would their resonance frequency be off, and therefore not much improvement? or would 1 larger coil also fail due to the current limitations of the circuitry inside the receiver?
P.S.: I want to use the Qi standard rather than the touchstone hack
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?
Click to expand...
Click to collapse
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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Click to collapse
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.
Click to expand...
Click to collapse
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?
Click to expand...
Click to collapse
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.
This weekend, I did a well deserved 2015 Upgrade to my Galaxy Nexus, by making it compatible with Qi charging stations.
Showcase: https://www.youtube.com/watch?v=sbaimVOVAic
First thing I did, was take the phone apart. It's very easy and nearly impossible to do wrong. All you need to do is take out battery and sim card along with all the screws behind the cover. Then use a guitar pick or something similar to loose the clips around the screen: Start with the clip on the left, right below the volume keys, next the one above the speaker/frontfacing camera and the last two are located below the power button. This video shows how to do just that: https://www.youtube.com/watch?v=WIAM5pxdUiM
Afterwards, i drilled two holes with a 1mm drukk through two of the three contact plates, put small cables through said holes from the other side and soldered them to the contacts. It had to be as thin as possible, as the contacts make contact with the main board with tiny springs, that don't have a lot of give.
The three contacts are in the following order:
Left = +5V
Middle = [rumor]Samsung Fast Charge regulation[/rumor]
Right = Ground
After that was done, I use small metal strips (~0.5mm thick), shortened the cables and soldered them to these strips. Afterwards, I put the phone back together and fixed the position of the contacts according to the position the contacts of the Qi were in.
I had to scratch off some of the notches on the backplate, as these were in the way, due to the cables I had to route along the left side. Finally, I fixated the Qi module with some doublesided tape to the backplate and voilá, it was finished.
This cost me like 5 bucks for the noname aftermarket Qi module (charging station not included) and a few hours to get it all done!
If you got questions, feel free to ask (post, not pm pls!). Any kind of feedback is also welcomed!
Nice work! I added one of the USB qi coil addons and I found it got very hot when charging. I was worried it'd heat the battery up and shorten the life of it....
bamtan2 said:
Nice work! I added one of the USB qi coil addons and I found it got very hot when charging. I was worried it'd heat the battery up and shorten the life of it....
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Click to collapse
yeah, im experiencing a similar issue. Looking at the current the qi station consumes, my module doesnt seem to throttle at all (via usb, it starts at 1A and, starting at around 85% charge, it slowly drops to 0A).
The Qi module should communicate with the station and signal the charge rate and subsequently full charge status (= no more charging). nada. I ordered another module by another manufacturer to see if it makes any difference. though, I suspect the GN just isnt fit for Qi, no matter what
P.S. The temps of the battery quickly go up to 45°C. When using normal usb charging, 40°C is already pretty rare. However most of the heat is not produced by charging the battery itself, but by the coil transferring the temperature. the backside of the battery remains a cool 30°C, even after charging for a long time using Qi.
Did you solve the high temperature problem? I was thinking of a similar mod but also got high temps with an external USB plug-in receiver module.
Great! I wanted to do something like that, bought the Qi unit, and a platform for charging, but before soldering checked both charges, and I did not like the fact that you need to put the phone just to the point that he began to be charged