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There have been a lot of complaints about the flimsy connector for the Xoom charger. I also think that it is a very poor design at most. The metal pin is too long, the plastic part is poking out too much etc.
I am no engineer and also bad at drawing but I attached something that I think might work. If anyone feels like they could produce a prototype that would be awesome!
The small magnet might or might not work. If you look at the area where all the connectors are you will see a small metal plate that could probably be used to anchor the connector magnetically.
Any feedback is appreciated (even just to say that I am full of sh!t!)
UPDATE: I added an alternative design using the two metal connectors for charging and a silicone plug to keep the connectors in place. A magnet will give additional stability.
funnycreature said:
There have been a lot of complaints about the flimsy connector for the Xoom charger. I also think that it is a very poor design at most. The metal pin is too long, the plastic part is poking out too much etc.
I am no engineer and also bad at drawing but I attached something that I think might work. If anyone feels like they could produce a prototype that would be awesome!
The small magnet might or might not work. If you look at the area where all the connectors are you will see a small metal plate that could probably be used to anchor the connector magnetically.
Any feedback is appreciated (even just to say that I am full of sh!t!)
Click to expand...
Click to collapse
It charges my Xoom very fast. It is still working and has not caused me any issues. If it breaks, I will come back here to *****.
I was just referring to the connector but thanks for the warning
funnycreature said:
I was just referring to the connector but thanks for the warning
Click to expand...
Click to collapse
So was I. The stock one works fine however, alternatives are great as well. I just do not see a need for one personally. Others may.
Yeah, the stock connecter scares me. I like your design though I'm not sure anyone here has the means to develop and sell it. I'm hoping maybe someone may find a softwear solution to charge via the USB micro port. What do you guys think, possible or no?
funnycreature said:
There have been a lot of complaints about the flimsy connector for the Xoom charger. I also think that it is a very poor design at most. The metal pin is too long, the plastic part is poking out too much etc.
I am no engineer and also bad at drawing but I attached something that I think might work. If anyone feels like they could produce a prototype that would be awesome!
The small magnet might or might not work. If you look at the area where all the connectors are you will see a small metal plate that could probably be used to anchor the connector magnetically.
Any feedback is appreciated (even just to say that I am full of sh!t!)
Click to expand...
Click to collapse
I like it! i think its a pretty good idea. Wish i knew someone who could create one. I would buy it. stock one scares me
how the F do magnets work?
anyhow, yeah really good design. I would buy that too.
i just turn it upside down while charging it.
I would buy one of those
I have to ask, why you would use that connector at all if you want to redesign a magnetic charger? Why not use the same priciple to connect it to the two plates on the bottom next to the hole for power?
As someone who repairs laptops for a living, this was the single most troubling design aspect of our new toy. It looks like it will be far to easy to damage the internals of this device with the default power cable.
It would make more sense to use a breakaway magnetic connection that makes contact with the two metal plates. I have not looked in to it too far but it would seem that the docs use this and the USB in them is strictly for audio out.
I was actually wondering if the metal plates would be used for dock charging. Since I don't own a dock I can't check. But if it is then yes, the charger should be attached magnetically! Thanks for the clarification. I'll try to design more options
Sent from my Xoom using Tapatalk
keitht said:
So was I. The stock one works fine however, alternatives are great as well. I just do not see a need for one personally. Others may.
Click to expand...
Click to collapse
My only complaint with the xoom, honestly is the charging system.
For starters, I don't see a reason to not allow charging over USB. Sure the voltage would only be 5v, and it would take considerably longer, but the option would be nice. This isn't to say I want to do away with the 12v charger, because the speed at which it charges is lovely, just the option for the other.
Secondly, the needle-like connector screams, "I want to be broken quickly!" Was there really a need to make the connector in that type and size?
Thirdly, the placement of the charger port is hideous and impractical. It's dead center at the bottom. I rarely use my xoom flat against a surface. I purchased the display portfolio that motorola made. The charger port is not only a hinderance to the utilization of my portfolio case, but is also covered at all times when using the case in any manner that motorola designed it. I'm sure this is simply a brain-fart on motorola's part, which happens to everyone and is understandable, but is there a reason the charger port couldn't have been placed on one of the sides of the device? I would say preferably the left hand side, as people are less likely to turn the device to sit on that side.
I'm not simply posting this to complain, just express my thoughts on the only true fault that I feel the xoom has. On that note, a 90 degree *honestly 180 degree by the design sketch* connector would be lovely, IMO. It still wouldn't be usable with the portfolio case, but it would allow someone to angle the xoom without fear of breaking the charger off inside it.
The two metal plates are indeed for charging on the dock. It takes away the need to use the stock charger on the needle tip. Just plug the charger into the dock and set the Xoom on it. I charge this way every time.
markbo2000 said:
The two metal plates are indeed for charging on the dock. It takes away the need to use the stock charger on the needle tip. Just plug the charger into the dock and set the Xoom on it. I charge this way every time.
Click to expand...
Click to collapse
Only problem is that's a $70-$120 solution
Why even have the plug then and just use the metal plates?
xlGmanlx said:
Why even have the plug then and just use the metal plates?
Click to expand...
Click to collapse
The plug would add additional stability so that it doesn't come off so easily. Not sure how strong you could make the magnets. As I said, I'm no engineer
Makes sense, maybe a smaler nub though haha, otherwise I like the idea
funnycreature said:
The plug would add additional stability so that it doesn't come off so easily. Not sure how strong you could make the magnets. As I said, I'm no engineer
Click to expand...
Click to collapse
Apple has a patent on the magnetically attached charger. Perhaps this is why motorola went the direction that it did.
http://patft1.uspto.gov/netacgi/nph...XT&s1=7311526.PN.&OS=PN/7311526&RS=PN/7311526
im gonna make this. I will let you guys know how it works. my first android by the way!
Sweet! I was also thinking about getting some latex and a second charger that I can strip and modify. This will be so cool!
Sent from my Xoom using Tapatalk
I don't know if it has been posted but there has been a surge of DIY of inductive charging in order to get it to work with our phones.
Now I've checked out the back covers and mats that are coming out for our phones and no offense to anyone but they look awful. It takes away from the sleek design and feel of the phone.
Okay enough talking, check it out for yourself:
This one is for our phone, the Vibrant / i9000:
http://www.qianqin.de/2011/09/18/samsung-galaxy-s-wireless-inductive-charging-mod/
This one is for the Epic 4G, which gives greater detail on how to do it:
http://forums.androidcentral.com/ep...c-4g-touch-stone-mod-details-lots-photos.html
Hope this inspires some of you guys to get creative and have a cool unique Vibrant
UPDATE::: 9/30/11
For those who do not feel like reading through threads.
Here is a detailed guide on how to mod your vibrant or any other phone for that matter (without a metal back case) to have inductive charging.
http://youtu.be/0ga4N_Ih9GE
You're welcome.
Love it!
love it , but i also need a inductive charger to charge my inductively chargeable vibrant )
The first link has that. If you look at the video the guy uses a palm stone in order to do the charging. You would buy it as a set.
Sorry for the double post but here is another guide. This one is done all internally without the wires hanging out. In a little while there will be a video outlining the whole thing, if people want me to post that I can do that as well..
http://blog.qinyujie.net/2011/09/24/557/
Has anyone with a Vibrant tried this? I feel like they should and then I might...
The mod shown takes the microUSB slot so its unusable. Qian Qin is currently working on doing a mod which retains the microUSB intact and is all done inside the phone circuits. It will be more advanced and definitely require you to take the whole phone apart but the result should be far more awesome. I'm waiting for that one before doing it.
He finished his video today!
http://www.youtube.com/watch?v=0ga4N_Ih9GE&feature=player_embedded
This is what Alienz was talking about, having the inductive charger without interfering with the micro usb.
That video is SUPER detailed and easy to get. I just ordered all the parts. $23 total shipped.
Will be doing this mod next week. Will be awesome when I'm inductively charging my 1800mah genuine Samsung Galaxy SII Touch battery in my Vibrant
Will this mod work if I use a tpu case cover? or must be without anycase thanks.
That is so bad ass!!
---------- Post added at 04:47 PM ---------- Previous post was at 04:36 PM ----------
Whats that gold stuff called? I'm going to go to go my local hardware store and get some.
futango said:
That is so bad ass!!
---------- Post added at 04:47 PM ---------- Previous post was at 04:36 PM ----------
Whats that gold stuff called? I'm going to go to go my local hardware store and get some.
Click to expand...
Click to collapse
Do you mean the self-adhesive copper foil? It's very affordable.
I'm definitely working on this next week already ordered everything I need. All in all - $20
Sent from my SGH-T959 using XDA App
I have a HP Touchpad and have the inductive charger for it.
The Touchpad is in a Leather case and even when I have the case open (that's 2 flaps of fat leather now), the inductive charging works just fine.
SO, I think it's safe to say that regardless of what case you have (unless it's some sort of metal of insulating one), charging will work just fine.
Man how are you guys getting the parts so cheap? I ordered mine off ebay and it was about $30 shipped.... Not that I'm complaining, it's still a good price but I feel like I'm missing something.
modfrenzy said:
Man how are you guys getting the parts so cheap? I ordered mine off ebay and it was about $30 shipped.... Not that I'm complaining, it's still a good price but I feel like I'm missing something.
Click to expand...
Click to collapse
The power of Google my friend, the power of Google.
Xenoism said:
The power of Google my friend, the power of Google.
Click to expand...
Click to collapse
I guess my google force isn't as strong as others... haha.
What guage of wire to use? is too thin going to be a issue with overheating?
Just tried the mod.
Nearly impossible to solder those wires without a microscope. I have a very good soldering iron and without a magnifying glass its just not a good idea to do. Pretty sure I ****ed my phone up cause I think I shorted 2 pins. :/
****.
^
You could put a razor blade between the pins to prevent bridging the pins.
Finally completed my inductive charging mod after many iterations. I took my phone apart 4 times because of quircks I thought may be due to the wire but in the end weren't.
By the end, I was such an expert it took me under 5 minutes to fully disassemble the phone. Sad I know.
But you only care about results right?
RESULTS:
PROS:
-Inductive charging just as shown in the video
CONS:
-HARD procedure. From taking the phone apart to figuring out exactly how everything is supposed to go. It's deceptively simple in the video but in practise will take you a while. For example, it is not shown that the inductive charging circuit makes the phone very hard to close using the original cover and hence, a lot of adjustments must be made.
-DOES NOT WORK WITH A CASE. That's right, this mod does not work with ANY case attached to it. The Pre touchstone is apparently too weak for that. That was the deal breaker for me. After getting it to fully work, I dismantled it angrily when I found no practical way of having a case on and using this.
-Costs money. Costs of 20-$30 depending on what you need and get.
-Expect to sink quite some time into this as well.
Overall, if you don't use a case with your phone, you can consider doing this mod. For the vast majority of users though, this is not practical. I will next try to incorporate this mod into a case and see if I can do that instead with a removable slim microUSB. I find the soldering wires on the inside and whole procedure to be a bit too risky.
}{Alienz}{ said:
Finally completed my inductive charging mod after many iterations. I took my phone apart 4 times because of quircks I thought may be due to the wire but in the end weren't.
By the end, I was such an expert it took me under 5 minutes to fully disassemble the phone. Sad I know.
But you only care about results right?
RESULTS:
PROS:
-Inductive charging just as shown in the video
CONS:
-HARD procedure. From taking the phone apart to figuring out exactly how everything is supposed to go. It's deceptively simple in the video but in practise will take you a while. For example, it is not shown that the inductive charging circuit makes the phone very hard to close using the original cover and hence, a lot of adjustments must be made.
-DOES NOT WORK WITH A CASE. That's right, this mod does not work with ANY case attached to it. The Pre touchstone is apparently too weak for that. That was the deal breaker for me. After getting it to fully work, I dismantled it angrily when I found no practical way of having a case on and using this.
-Costs money. Costs of 20-$30 depending on what you need and get.
-Expect to sink quite some time into this as well.
Overall, if you don't use a case with your phone, you can consider doing this mod. For the vast majority of users though, this is not practical. I will next try to incorporate this mod into a case and see if I can do that instead with a removable slim microUSB. I find the soldering wires on the inside and whole procedure to be a bit too risky.
Click to expand...
Click to collapse
thank you for your feedback and insight. i am going to attempt this later today, any tips on how to get the solder just right lol that initial soldering is what worries me the most....whats the best way to go about the initial soldering so as to not short out the pins.
either way, i will give my results and feedback asap when i have time to attempt this later today.
I took a lot of inspiration for these projects from some of the stuff I saw posted around here. Like many others, I got tired of the lack of accessories available for the GN and built a few of my own. I was also too impatient to order and wait for the pogo pins that I should have been using for this project, so I used guitar string instead. :silly: Oh well....
The Wooden Desk Dock
This one was fun and It didn't take too long to build. Thanks to chopper the dog for his info in this thread which I used as I was building this. To put this together I used:
a couple pieces of scrap wood for the body,
a paint stirrer cut to size for the platform,
some 46 gauge guitar string for the contacts,
solder,
electrical tape,
a strip of 1/8 inch foam (on the left side. hard to see in the pic) to seat the phone snugly,
a few felt pads for feet,
and, an NFC tag to trigger landscape mode for the phone and it has been working nice.
Ideally, I need to get this thing sanded down a little more, get the tag hidden a little better, and maybe stain or paint it.
The Modified Verizon Car Dock
I'm pretty happy with the way this one turned out, but I'm not finished yet. For this one I used:
an old Verizon car charger,
some 46 gauge guitar string for the contacts,
solder,
electrical tape,
two 1/4 inch pieces of spray tube from a can of WD-40 (I used these as guides for the guitar string to slide through),
some CA glue to hold the tube guides in place (We'll see long this lasts...)
a small bolt, nut, and teflon washer,
a short piece of black wire (I used this to secure the power cord to the dock. It was the smallest, nicest looking way of doing it short of using a twist tie, blegh.)
an NFC tag to trigger landscape mode for the phone,
and a Razer sticker to hide my mistake of shaving too much of the back of that Samsung plate away too fast and melting the front (dammit!)
As you can see, up close it's not the prettiest looking job, but with the phone snapped in it looks just fine. I was a huge pain getting those contacts just right, but eventually using those tubes made it much easier. I carved out a section of the soft rubber inside, because it left a mess when I initially drilled through it. It made it really hard to line the contacts up.
I'm going to work on this one a little more today. I want to add a connector to make it possible to break the cord away from the dock and possibly make another cord with a USB connection on the end.
Adding the Connector to the Modified Verizon Car Dock
This was easier than I expected. I started searching around for supplies and found a couple of old cordless handset bases with just what I wanted, some kind of 90 degree connector. I pulled the receptacle from the board inside the base. Since we had multiple bases, I was able to grab two nearly identical plugs.
Then I removed the fixed car charger from my dock and found a suitable place for the receptacle. I soldered the wires in place and fixed the receptacle in place with a zip tie.
I think the zip tie was the best way to go. It's a little tight under the samsung cover.
I used the plugs and spliced them onto to the verizon car charger and a regular usb cable. For anyone who's interested, the wires inside the verizon charger are red (5v) and green (ground).
After a little testing, I decided the receptacle needed another zip tie and a round of CA glue to hold it in place. Here's the finished product. I'm very happy with how it turned out.
I also have another problem I need to work out. I use my 12v socket in the car for my bluetooth receiver. I need to figure out a way to power both in a small compact way. I've seen those 12v socket splitters and I will not put something like that in my car. What do you guys think about trying to fit both of these into one package?
I had a lot of fun working on these over the couple days. Let me know what you guys think
Well done, I like the look of the chunky wood dock. Although like you said sanding it down would make it look better.
Thanks jonny. I'm thinking a dark stain on it would look nice. I want to replace the platform with something a little more durable as well.
Yea I dont blame you. It doesnt quite fit with the look of the rest of it. Perhaps if you have any more of the wood you used you can use that and just cut a really thin piece to use as the platform.
Hi,
I'm new there, get Galaxy SII about a month ago. Since the beggining I'm using the Otterbox Commuter case and trying to connect charger in the total darkness makes my angry too often, I wanted to get wireless.
I know that there are some topics on xda already but none of u decided to go that way - IMO the easiest way.
I've used my Otterbox case and Powermat Wireless Charging System for Blackberry Curve 8520/9300 (u can find it at Amazon, search for B00462QB4W at really nice price ~6 pounds). Basically, u just need to take out coil and electronics from the blackberry cover with the socket (yes, that tiny socket on side of the cover) & pull out micro usb<->electronics connector. Now u can bin blackberry cover as ts useless now.
Next the worst thing, I have to cut out some more plastic on the hard part of the case and connector, to make the usb plug more in the middle(it not gonna fit as u get it) - making all fit properly was the hardest thing.
Easy - stick coil with PCB on the middle of your case, remember about socket which have to be exactly in the middle of the cutout for charger. I have used some super glue to stick this socket to case.
Now easy - X-acto knife and cut out srubber part of the case - need space for electonic - until I did it there was no chance at all to put phone into case.
Everything done - time to test wireless case for SGS2 and... it doesn't work
Quick check and the problem was between plug & socket on the case - the solution was to put some rubber from the case on the connector which isn't too thick.
I've put phone again into case, put on the Powermat plate and... it's charging finally
All that work took about 25-30 minutes.
U need just some super glue, sharp knife, sandpaper, site cutters can be also helpfull
If u don't feel too much in DIY stuff this way gonna be the best for u - No need to solder anything
Any questions? Feel free to ask
Yeah, nice work, but I wish to see video or photo because it is easy way to understand the idea my friend
Sent from my GT-I9100 using Tapatalk 2
al3nkbootas said:
Yeah, nice work, but I wish to see video or photo because it is easy way to understand the idea my friend
Click to expand...
Click to collapse
Unfortunately no photos of work but will try to make some of the finished project at the evening.
i'm too new on the board, so cannot post pictures :/
theres album > imageshack.us/ g /1/9941419/
caliber2001 said:
i'm too new on the board, so cannot post pictures :/
theres album > imageshack.us/ g /1/9941419/
Click to expand...
Click to collapse
I cant get the link to work.
f4s7d3r3k said:
I cant get the link to work.
Click to expand...
Click to collapse
Just remove spaces, it works.
Links:
PowerMat Kit
Otterbox Commuter Samsung Galaxy S2 - price is shockin high at the moment
Gallery
Hey guys.
I recently stumbled upon some magnetic docking problems with my Nexus 5, so I wanted to know how the charger from Google managed to hold the phone very well. I looked for a teardown of the charger but I found none, neither in XDA nor by a Google search. After hesitating because of the warranty, my curiosity was stronger and I disassembled mine.
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The little beast, up and down. There is adhesive rubber on the bottom.
I had no idea about where to start until I discovered how the Nexus 4 charger was disassembled, so I removed the black rubber band on the bottom of the charger. There are 4 screws under it, they're easily removed with a Torx 5 screwdriver.
I love tools from iFixit guys.
The plastic part is then pulled and reveals the main charging board. This board must be carefully lifted because of 4 wires that go under the metallic part, especially the 2 copper wires which seem to be very thin. The board is above a metallic chassis and hides what seem to be 4 magnets.
The main charging board.
The main charging board, with 4 wires going under the metallic part. Notice the 2 little copper wires.
The metallic part. Notice the odd shape (cuboid) of what seems to be 4 magnets.
I couldn't extract the magnets from there, so I had to pull the metallic part. It wasn't easy, even when I understood that it was glued to the black glass panel. It's handy to start with holes designed for wires to separate the metallic part from the glass. WARNING : The glass is actually transparent and there is black paint on it. The paint is under the glass when you look at the (not disassembled) charger. It is VERY EASY to do some scratches, as I've done, when separating the metal part from the glass. Try to avoid it if not needed, else do it with caution.
Using a thin and resistant tool starting from holes for wires makes it easier.
Nice scratches. Meh. I'm gonna use some black paint. If you do this, be careful with the black paint on the glass.
Loads of glue, but nothing impossible to break. You can see the glass, from this point of view the black paint is above it.
We can see the charging coil now, and 4 slots for magnets. Each magnet is held by a black plastic thing. Be aware of the little white plastic part that may fall discreetly, it's used to guide the red light of the charger's LED.
At the left, the charging coil and slots for magnets. At the middle, magnets and black glass. At the right, big piece of black plastic removed at the beginning.
At the left : the little guy trying to escape. At the middle : the place where it belongs to. At the right : same spot with the part inside.
Magnets and their plastic support are bound to the glass only by glue. They come together when you try to extract one of them.
They easily come. Together. No way to extract only the magnet. Luckily you can freely move them, and then use the magnets slots as guides when remounting the charger
Then...surprise ! Each "magnet" is actually made of 3 different pieces. It is very instructional about magnet configuration required to build an optimized magnetic dock. Most people use a single magnet. It isn't completely efficient because metal plates in the Nexus 5 behave oddly and Google had this in mind when designing the charger. There are 2 magnets, attracting the external part of the phone's metal plates, while not covering the coil with their magnetic field. The 2 magnets are glued to a ferromagnetic metal part, and to some black plastic.
One magnet is magic. Two magnets are pure awesomeness.
This wouldn't really be a good topic without a perfectly photoshopped picture, which should be useful to understand how those magnets are held together and how they attach to the Nexus 5. This picture is a bit outdated and wrong, replace "Cuboid magnet" by "Cuboid ferromagnetic plate". Oh and there is no repulsion from the center of course
Sorry for the crappy pictures, I don't have a lot of skills in teardowns.
I hope this will be helpful for you.
EDIT : When you remount your charger, at the end, when you put back the black plastic part to screw it, don't forget the little LED. Try to power on the charger to see where the light goes, because the plastic part got 4 sides but only one of them got the little hole in black paint for the red light.
EDIT² : I got an explanation about how were those magnets working by Craiq, and I checked everything on my own Google charger. Here is his picture, it's self-explanatory.
Hey great thread ! But seems that a few pics are broken ...won't load on tapatalk (mobile) and my laptop. Hopefully its not just me
Sent from my Nexus 5 using Tapatalk
zolo185 said:
Hey great thread ! But seems that a few pics are broken ...won't load on tapatalk (mobile) and my laptop. Hopefully its not just me
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
You're right, I uploaded pictures on XDA and made links of them but this doesn't seem to work much. I'll host them on an external service and edit my post.
Ano59 said:
You're right, I uploaded pictures on XDA and made links of them but this doesn't seem to work much. I'll host them on an external service and edit my post.
Click to expand...
Click to collapse
Kool. Glad to see such a quick reply. And for the pics that are there ...they're pretty great and your detail much appreciated. Good job :good:
Sent from my Nexus 5 using Tapatalk
zolo185 said:
Kool. Glad to see such a quick reply. And for the pics that are there ...they're pretty great and your detail much appreciated. Good job :good:
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
Thanks.
Pictures are now uploaded on Imgur, there isn't any trouble displaying them anymore. There are still XDA thumbnails at the bottom.
I should write and post another topic soon, which is about replacing the metal plates in the Nexus 5 by...magnets. Then official charger docks less efficiently but you may modify it too (I'll try it) and with magnets inside, making custom chargers is incredibly easier.
Updated the topic thanks to Craiq's explanations and to my own further testing.
By the way, I don't recommend replacing Nexus' metal parts by magnets, I tried it but I got disappointed by the heat produced by wireles chargers after this mod so I put back the metal plates. However this teardown is still useful to understand how current custom chargers designs are sub-optimal and how to improve them (at the expense of magnets size increase).
Is the charging coil in this charger any different than the genetics out there? Wasn't sure if there was a quality gap in qi coils.
thfreedumb said:
Is the charging coil in this charger any different than the genetics out there? Wasn't sure if there was a quality gap in qi coils.
Click to expand...
Click to collapse
The coil in Google's charger is smaller. There is also an additional inner "copper coil" (it doesn't seem to be insulated). I have no idea what it is for, the 2 copper wires mentioned in my first message come from the coil to the charging board. They are close together which is strange because with no insulation they can easily make a shortcut, at least if you think of this inner coil as a traditional electrical circuit.
Thanks for the teardown! I was wondering what they did, and why.
Is there any safe way to improve the strength of the magnetic field provided by the permanent magnets? I had a really dumb moment, and actually glued a metal plate to my phone's case, which made it stick to the charger much better but completely absorbed the weak inductive field needed to handshake the Qi process. If charging had started, I assume the plate would have gotten very hot. Obviously, I undid my mistake before anything permanent happened.
But I'm still looking for a way to improve the strength of the retention. I could glue some very small metal disks (washers or something) to the inside of the case, to give the original magnets something closer to attract. I could replace the original magnets with something N52.
My reason for all this is to improve the stability of the phone against the charger when the whole assembly is in a vertical position (say, in a car, or mounted to a wall).
What sizes of the Magnets does the Google Charger use? I would like to buy the same size with a larger pull force - so go for something like an N52?
Pandages said:
Thanks for the teardown! I was wondering what they did, and why.
Is there any safe way to improve the strength of the magnetic field provided by the permanent magnets? I had a really dumb moment, and actually glued a metal plate to my phone's case, which made it stick to the charger much better but completely absorbed the weak inductive field needed to handshake the Qi process. If charging had started, I assume the plate would have gotten very hot. Obviously, I undid my mistake before anything permanent happened.
But I'm still looking for a way to improve the strength of the retention. I could glue some very small metal disks (washers or something) to the inside of the case, to give the original magnets something closer to attract. I could replace the original magnets with something N52.
My reason for all this is to improve the stability of the phone against the charger when the whole assembly is in a vertical position (say, in a car, or mounted to a wall).
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I've just tried installing 10mm/1mm N52 magnet disks in my Note 3's case in order to be able to use my Nexus charger as a car charger/dock. First off the magnets are disturbing the screen layer for pen input causing the area around the magnets to be distorted when trying to write using the pen.
Also, I tested the magnetic attraction difference to my phone with a naked Nexus 5, and the Nexus definitely has a stronger attraction to the charger. This makes sense as my magnets are attracted to one magnet and repelled by the other in the charger, whereas the Nexus 5's medal disks/plates are placed in the middle of the magnets and are attracted by both. FYI my magnets have been placed to optimally attract one of the charger's magnets (43mm center to center).
I'm now trying to find some Nexus 5 metal disks/plates equivalents. I understand these are 6mm diameter disks, but don't have any other info. Does anyone know any more specs on these or where to source these easily? I'm thinking 6mm/1mm steel disks that I might be able to find in a hardware store or similar. Can't find anything on eBay. Any thoughts?
sireddie said:
Also, I tested the magnetic attraction difference to my phone with a naked Nexus 5, and the Nexus definitely has a stronger attraction to the charger. This makes sense as my magnets are attracted to one magnet and repelled by the other in the charger, whereas the Nexus 5's medal disks/plates are placed in the middle of the magnets and are attracted by both. FYI my magnets have been placed to optimally attract one of the charger's magnets (43mm center to center).
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very interesting thread.
looks like the google charger is almost a clone of palm`s touchstone. The touchstone has the same "2 magnets 1 metal between" thing as the google charger.
See the old S3 touchstone tread:
http://forum.xda-developers.com/showpost.php?p=34084651&postcount=210
the best way you can handle the two different polarities is to use two smaller magnets in the back of your phone.
one with + and one with - .
when you connect the two magnets in your phone oder case with the smaller side together you will reach the max attraction.
like i did on the s3.
I'm also very interested in the size of the magnets inside the charger.
Great teardown, ill be using this info to use a nexua charger for the N6, hopefully remiving the magnets and liftinf the coil closer ti the glass will solve the issue.