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?
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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'd really like to get "fast" inductive charging without a software mod. The pogo pin thread has obviously solved the problem. I'm wondering if anyone has given any thought to merging the inductive charging mod with a small microcontroller (like maybe the attiny4) and voltage regulator. They'd have to be small enough to fit under the battery cover. Any thoughts?
Thought 1: The pogo pin thread would be a good place for this question.
Thought 2: Having stuffed a palm pre inductive coil under the battery cover, and seen the resulting bulge, there is definitely not enough room for such a circuit. Maybe possible with an empty extended batt cover, but not enough interest to make it worth while when it can be done externally with a dock or much easier with FC kernel.
I have mine under the extended battery case and with the attiny4 there shouldn't be any problem in size (it is microscopic!).
I decided to post a new thread as most of them out there are for Galaxy Note II or Galaxy i9305
Before you start doing anything I'd suggest reading all these threads so you decide what's best for you.
http://forum.xda-developers.com/showthread.php?t=2096585
This one,although for Galaxy Note, IS REALLY GOOD. THANKS to "Ryan_G" for making such detailed explanation and pics, it helped me a lot!
http://forum.xda-developers.com/showthread.php?t=1951493
Thanks to android94301 for this one:
http://forum.xda-developers.com/showthread.php?t=1877191
thanks to Richard Searley who explains which pin is positive and negative.
http://www.youtube.com/watch?v=uAqP3T_Mbzg
thanks to "qianqinde" for showing how to remove the parts from the Palm cover.
http://youtu.be/0ga4N_Ih9GE?t=4m21s
The Parts I used:
1.Palm Touchstone Charging Dock-£4.99Amazon UK
2.Original Palm Touchstone Back Cover-£3.49Ebay UK
3.Soldering Iron + solder
4.Clear tape,because it's very thin. black electrical tape is thicker and want to make the slight bulge as smaller as possible. you will see on one of the pics i used electrical tape, but I removed it and used clear tape
5.Wires from old not Genuine iPad cable; because the wires are very thin.
Palm Pixi Cover-£3.99Ebay UK If you buy one of those,as far as I know positive and negative are not reversed (CHECK for yourselves before doing anything) as on Palm Pre cover!
Genuine Palm charger-£3.99Ebay UKI got this charger, because I needed a one anyway
Chargers I can confirm they work with the Palm charging dock: Galaxy S3(5v-1A)##Nexus 7 (2A)## old HTC Desire Charger (5v,1A)## If your phone keeps vibrating and the window that says charging keeps popping up over and over again, your charger is not supplying sufficient power. My Motorola charger(800mA) did that.
Good soldering skills are needed to perform the mod. I guess you wouldn't wanna melt the plastic on the phone so practice before you attempt this. Twist the wires to the desired shape first and then solder. This way you will prevent breaking off the pins from the motherboard
When you see the pics, you will notice I barery used any solder, this is, because you really don't need much as it catches really easy. It should't be a problem since there are no moving parts there to force the wires to fell off.
Decided to stick everything to the battery,because I rarely remove it.
You will notice on the pics I've put the wires along the of the battery as there is enough space for them to go in nicely
When you solder avoid pulling the wires too much so you dont damage the pins on the Phone's motherboard.
Put a piece of card board on the battery when you solder so you don't damage it.
If you have very thin wires don't hold the soldering iron for too long because you will melt the insulation around the wire. you could blow a few time so it cools down faster.
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
I'm pretty sure that my USB charging port on my phone is loose because I use an extended battery, and it's not as tight as the stock battery. I'm on the ZeroLemon battery. There are two cases: the big one, and then there's a newer, slimmer one that I have. Same battery capacity. Over time, the charting port has just gotten more and more loose.
How can I fix this?
JOSHSKORN said:
I'm pretty sure that my USB charging port on my phone is loose because I use an extended battery, and it's not as tight as the stock battery. I'm on the ZeroLemon battery. There are two cases: the big one, and then there's a newer, slimmer one that I have. Same battery capacity. Over time, the charting port has just gotten more and more loose.
How can I fix this?
Click to expand...
Click to collapse
You can order new charging port and install it.
Sent from my SM-N910V using Tapatalk
JOSHSKORN said:
I'm pretty sure that my USB charging port on my phone is loose because I use an extended battery, and it's not as tight as the stock battery. I'm on the ZeroLemon battery. There are two cases: the big one, and then there's a newer, slimmer one that I have. Same battery capacity. Over time, the charting port has just gotten more and more loose.
How can I fix this?
Click to expand...
Click to collapse
If its dislodged from the board your screwed. Would require a heating station to properly clean the board (tool the size of a large closet) and teeny tiny soldering equiptment (the kind they use.....well on this very high end and expensive. If its just the sealant you might be able to reapply a silicone based adhesive (lightly with like a brush the size women use on there eyelashes whoch would proabably work if it were cleaned id tape off the actual connection to prevent sealant from getting inside) id plgo so far as to clean the old adhessive from around the port but thats where id quit. If it was anything more id consider wether the port worked at all . If so id go no further out of fear of permanently destroying the only means id have of charging the device