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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'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 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.
Whats the smallest QI wireless charging receiver (the foil) folk have come across?
I need one that's 40mmx40mm or less. Most seem to about 37x62.
Anyone got some old/duff ones they could cut and see if the excess padding material can be removed without jeopardising the coil/operation......?
I want to make my Omate TS wireless chargeable.
As far as I know, their sizes are standard and open. You should go check the official Qi site.
daniel_loft said:
As far as I know, their sizes are standard and open. You should go check the official Qi site.
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Thanks, but the Wireless Power Consortium is just the owner of the Standards - its up to the manufacturers' to build. Many of the cheap Asian suppliers are probably not certified anyway.
Although I can trawl through, e.g, Amazon, Ive not yet found the right size, and expect it might be more specialised.
CPGOD said:
Whats the smallest QI wireless charging receiver (the foil) folk have come across?
I need one that's 40mmx40mm or less. Most seem to about 37x62.
Anyone got some old/duff ones they could cut and see if the excess padding material can be removed without jeopardising the coil/operation......?
I want to make my Omate TS wireless chargeable.
Click to expand...
Click to collapse
I'd like the thin one than the small one( I'm sure I will lose it someday), I think most QI receiver are standard you can try LuguLake wireless Qi
receiver, It's thin enough that you can put on your case.
LuguLake wireless Qi is a transmitter (charger) not a receiver. the receiver coil is inside the phone and it looks like a small, thin patch. You'll only see it if you bought it for a Galaxy or something similar. You can find quite a lot of them on eBay for 5-7 $.
Regarding the transmitter coil, I've read the standard and there are some 2-3 specified sizes. Anything bigger or smaller would make things not work correctly. Even more, I've seen at least 3 kinds or chargers and their coils were about the same.
The TrueSmart is about 45 x 45 mm. At that external size, I don't see the inside as having enough space for a Qi coil. On top of that you'd need some charging circuit. Don't forget that Qi standard specifies communication between the charger and the phone (which I've captured on oscilloscope too).
I'm not trying to discourage you, I'm just stating some facts.
daniel_loft said:
LuguLake wireless Qi is a transmitter (charger) not a receiver. the receiver coil is inside the phone and it looks like a small, thin patch. You'll only see it if you bought it for a Galaxy or something similar. You can find quite a lot of them on eBay for 5-7 $.
Regarding the transmitter coil, I've read the standard and there are some 2-3 specified sizes. Anything bigger or smaller would make things not work correctly. Even more, I've seen at least 3 kinds or chargers and their coils were about the same.
The TrueSmart is about 45 x 45 mm. At that external size, I don't see the inside as having enough space for a Qi coil. On top of that you'd need some charging circuit. Don't forget that Qi standard specifies communication between the charger and the phone (which I've captured on oscilloscope too).
I'm not trying to discourage you, I'm just stating some facts.
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Daniel - thanks for your comments - hopefully they will help others understand; I should have stated more info first:
I'm fully conversant with QI technology, I know the difference between charger (transmitter) and receiver.
I have a charger; its currently wirelessly charging my OnePlus One.
The size of my TS is indeed 45mm, and I know the general size of commercial receivers is bigger than this.
Hence reaching out to the community if anyone has access to something smaller!
CPGOD said:
Daniel - thanks for your comments - hopefully they will help others understand; I should have stated more info first:
I'm fully conversant with QI technology, I know the difference between charger (transmitter) and receiver.
I have a charger; its currently wirelessly charging my OnePlus One.
The size of my TS is indeed 45mm, and I know the general size of commercial receivers is bigger than this.
Hence reaching out to the community if anyone has access to something smaller!
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hi @CPGOD - did you ever find a smaller Qi receiver coil for purchase? I'm looking for one myself actually. The smallest I've found is this: https://www.adafruit.com/products/1901
Which is small, but not small enough. I need one that's not much bigger than 35x35mm square at most. The smallest I've seen in a product is the round one in the bottom of the Moto 360 smartwatch, but I think they had that made custom.
I know this is an old tread, but did anyone find one?
Found round 10mm X 1mm thick.
CPGOD said:
Whats the smallest QI wireless charging receiver (the foil) folk have come across?
I need one that's 40mmx40mm or less. Most seem to about 37x62.
Anyone got some old/duff ones they could cut and see if the excess padding material can be removed without jeopardising the coil/operation......?
I want to make my Omate TS wireless chargeable.
Click to expand...
Click to collapse
Check this site out lots of options if you just search "wurth". You will still need a charging circuit to adapt coil to device, but you should have some room to spare now.
http://www.mouser.com/ProductDetail...X9/GlEDuz966ZHodBFFvsnTk9f1cdWDZKrtyNltCamQ==
CPGOD said:
Whats the smallest QI wireless charging receiver (the foil) folk have come across?
I need one that's 40mmx40mm or less. Most seem to about 37x62.
Anyone got some old/duff ones they could cut and see if the excess padding material can be removed without jeopardising the coil/operation......?
I want to make my Omate TS wireless chargeable.
Click to expand...
Click to collapse
Maybe something like this with a USB C if available
Wireless Charging Receiver Adapter Accessories for AirPods - QI wireless charging
https://www.aliexpress.com/i/4000250099783.html
Okay... i´m trying to make a mod for my Z1C to make it qi compatible....
I have the magnetic connector from a dock (which is broken).
So, using the connector + cover + glue can make it work.... and of course, need to solder the receiver to the connector....
But, the big question... which receiver should i use?
First of all, i´m from Argentina... so i have a limited access to receivers.
I´ve seen here receivers from Samsung Galaxy S3, S4, S5, Note III and Note 4, and a few others generic...
The maximum current that could find was 650mA... but read some comments that the output 1000mA is a lie... and there is no difference between the receivers...
So, which one should i buy?
Thanks to all!!
Finally, get a 700mAh receiver, and cutting out the cable, mixing + soldering + glueing it all together, and now it´s working....
Samsung GS4 1000mA QI receiver
I have a few Galaxy S4(1000mA)/S3(800mA) QI receiver cards.
The cards are different depending on the contact points location in the phones.
So you just soldered the internal magnetic charging points to a QI receiver card inside the phone?????
If you have the QI Receiver inside the phone (only real place for it), how much pressure does that place on the back cover??
The back cover tends to break away from the frame without much effort, so having the raised 'bulk' of a Qi card in the phone would only add to the pressure for the back cover to separate.
On Samsung phones (GS4 which I've added QI cards) it does take a bit of brute force to chip the back cover on again and some GS4 aftermarket cases/covers can not be used with the QI card installed due to the back of the phone being ever so slightly raised.
I have the QI receiver cards, glue seals rings for Z1C back cover and the Qi chargers and it is something I have thought about, but with three working magnet DK32 docks around the house, it's not something I have advanced at this time.
Well done for getting it to charge via QI charger if that is what you've done.
Maybe a photo would be nice.
Okay... now, the photos:
The tape is over the receiver module.
The original contacts from the receiver were removed, and over there, was soldered some copper tape (that can be seen in the photos).
The contacts were made by opening-cutting a magnetic cable, soldering it to the copper tape, and then glueing it to the cover, to maintain position.
The charger seems to be very picky about position. Searching over the internet, seems to be a common issue with this model...
Hope it´s usefull...
Well... about the charger, there seems to be an easy fix to it's pickiness... Take off the upper side... That way, the thing will gone a cool itself, and the connection will become a lot easier...