Wireless charging?

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Thatoneguy.

Senior Member
Feb 23, 2011
246
28
Midwest
Any way to enable wireless charging? Possibly removing the back and with a touchstone similar to what's possible with the s3?

Swyped while swerving from my Samsung GS3
 

lucidvtec

Senior Member
Jul 28, 2010
680
49
Most places are declining to make this

We need moto to make these kinda features stock

The problem is the phone is not designed to be opened or the battery removed.. hence voiding warranty if u do so

That's why we prob won't see this for the RAZR HD and HD maxx


With the s3 u can just pop the back door off...this phone I have yet to see a breakdown... I really doubt the aftermarket companies that make those kinda product will want to invest in making a product that voids ur warranty just to install it

Sent from my DROID RAZR HD using xda app-developers app
 
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Thatoneguy.

Senior Member
Feb 23, 2011
246
28
Midwest
This is xda surely warranties aren't a concern? If i saw a tear down it wouldn't be hard to set it up with a touch stone like the s3 i would think?

Swyped while swerving from my Samsung GS3
 

lucidvtec

Senior Member
Jul 28, 2010
680
49
This is xda surely warranties aren't a concern? If i saw a tear down it wouldn't be hard to set it up with a touch stone like the s3 i would think?

Swyped while swerving from my Samsung GS3

If their is room

I forgot where I read it

But the two screws on the bottom come out then the screen slides up..as far as I remember.. lol

Sent from my DROID RAZR HD using xda app-developers app
 

shanghei

Senior Member
Oct 21, 2008
504
61
Not even worth trying, I attempted this mod on the Atrix HD which is done by connecting the positive terminal on the palm pixi to the +5v part on phone and it eventually worked but a usb had to be plugged into phone the usb wasnt plugged into anything but the phone wouldnt charge unless it actually detected a usb plugged in.
 

chrisjm00

Senior Member
Jul 29, 2007
754
123
Nottingham, MD
Unfortunately, I don't think it will happen. It is true that XDA doesn't care too much about warranties, but there is a big difference between hardware and software warranties. Accessory manufacturers aren't going to make something that you have to hack apart your phone for. What is worth more to you, a 30 dollar wireless charging accessory that you have to jimmy rig, or the warranty that protects your $650 investment? You can unroot easy enough to return to VZW but try explaning the wireless charging mod that's on there now.
 

DrunkenFerret

Member
Dec 22, 2011
33
3
ithaca ny
I've been interested in getting a wireless charging solution for my phone, and while I have to look into it a bit more to figure out specifics for certain things, I think it may be possible to create a case that plugs into the USB port so we wouldn't void our warranties.
Designing the case wont bee too much hassle, a micrometer and some 3D modeling software. However we need to find a way to get a micro usb connector that has a 90 degree bend in it to go into the port without causing any sort of scraping. Possibly have the right hand side of the case hinged and secured by snaps on top and bottom? or have the connector itself removable.

So materials for a test setup would require:
Touchstone components
90 degree MicroUSB male connector
Soldering gun
Custom case


I don't have the setup to do this available to me right now, however I think the biggest problem would be getting a connector small enough to keep from adding a lot of bulk to the side of the phone. Heck, with it only supplying .42 A at about 4.8 volts, it may not be inconceivable to group 2 in a case for faster charging. I haven't worked with the touchstone charger myself before, so I don't know their size.
Anyways, food for thought, and a possible personal project once I get some more important things finished up.
 

point45

New member
Mar 8, 2013
4
1
Hi,

Signed up just to post my results so far.

Ive gotten razr HD maxx to charge through the USB port using a touchstone pixi back cover.

It works using the touchstone charging base but the usb wall wart that came with the razr hd. The amperage coming though was not enough using a motorola dedicated usb wall charger that came with my bluetooth headphones putting out 500mA. It charges a little slower using the induction charger. I need to figure out if this will work running off my cars electrical system as that is my main motivation for getting this to work.

To get the phone to go into charging mode you have to either short out the USB data wires or connect the D+ wire to a 2v contact on the touchstone pixi circuit. Connecting the usb D+ to the 2v contact hopefully will allow me to hardwire this setup directly to the phone and leave the usb port free if, assuming I can find enough room inside for everything.

The phone is charging right now on the touchstone base, estimate 2hr to full charge from 70%

Im going to try and shove it all inside the phone tomorrow.

I've been interested in getting a wireless charging solution for my phone, and while I have to look into it a bit more to figure out specifics for certain things, I think it may be possible to create a case that plugs into the USB port so we wouldn't void our warranties.
Designing the case wont bee too much hassle, a micrometer and some 3D modeling software. However we need to find a way to get a micro usb connector that has a 90 degree bend in it to go into the port without causing any sort of scraping. Possibly have the right hand side of the case hinged and secured by snaps on top and bottom? or have the connector itself removable.

So materials for a test setup would require:
Touchstone components
90 degree MicroUSB male connector
Soldering gun
Custom case


I don't have the setup to do this available to me right now, however I think the biggest problem would be getting a connector small enough to keep from adding a lot of bulk to the side of the phone. Heck, with it only supplying .42 A at about 4.8 volts, it may not be inconceivable to group 2 in a case for faster charging. I haven't worked with the touchstone charger myself before, so I don't know their size.
Anyways, food for thought, and a possible personal project once I get some more important things finished up.
 
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point45

New member
Mar 8, 2013
4
1
I dont know if I can get this to work internally now due to soldeirng limitations.

There is just enough space to slightly force the phone back together (it does bulge) but the pins for the USB port are covered and recessed under the USB housing. There is not enough clearance for me to do a clean solder onto the contacts.

I can not find another trace for the 5v or D+ pin on the circuit board.

If i could remove the outer cover maybe but for now this is going to have to be a plug into the USB port/external mod until i either grow a bigger pair and try to remove the USB port or find alternate contacts to solder the leads onto.

EDIT: I actually just went for it and ground off the corner of the USB casing. And actually soldered the wires onto the pins. However the touchstone system will not allow this to work internally. The battey when laid on the coil will interfere with the EMF and cause an unstable voltage. It goes from a low of 4.8 to 5.5 v. Maybe someone thats an RF engineer can figure something out with the reflector.

Maybe if i get more motivation later ill check out a qi standard charging setup to see if its compatible. For now im going to find an outer case and just go with the usb plug use this externally.
 
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DrunkenFerret

Member
Dec 22, 2011
33
3
ithaca ny
Try picking up some foil tape and put it between the battery and coil. You should be able to pick some up at your local hardware or hobby shop. It may need to be touching the ground to be effective though. Depending on some things over the next month I might be able to start working on my own setup.
 

point45

New member
Mar 8, 2013
4
1
Tried that but no go.

With the foil covering the coil, the voltage fluctuates before the battery is even placed over it. I hope you can get it working internally, ive since used an otterbox commuter case to hold it all together.

Try picking up some foil tape and put it between the battery and coil. You should be able to pick some up at your local hardware or hobby shop. It may need to be touching the ground to be effective though. Depending on some things over the next month I might be able to start working on my own setup.
 

DrunkenFerret

Member
Dec 22, 2011
33
3
ithaca ny
In what order are you putting the components? Phone, battery then coil. Or phone coil then battery? Basically is the coil between the hardware and battery, or is the coil between the back panel and battery.

I can see where the issues would arise if it is between the battery and hardware. Both would be giving off EM waves if the device is on. If it is between them, try moving the coil to between the back panel and the battery.

Right now I can't afford to try an internal mod where I could kill the phone if I screw up, so until a couple things settle down for me I will only be attempting an external mod that fits in a case. If I can get the design right I may be able to make it so there is still a USB port available.

*Edit*
I'm sourcing/pricing components right now and you've already given me the voltage output, but how about the current provided by the coil? What I'm planning involves building a small circuit that would short the D+ wire only when there is no USB cable connected.
 
Last edited:

DrunkenFerret

Member
Dec 22, 2011
33
3
ithaca ny
Anyway we can get some pics of the project in progress?

Swyped while swerving from my Droid Razr Maxx HD

So I don't have the components at the moment to start my project physically, however as I said I am finding the parts I'll need. Apparently its a PITA to get male micro USB connectors without bulk orders, or importing from China. I'd prefer a SMT (surface mount for circuit boards) but those appear to be next to impossible. Anyways I've been able to find pretty much everything I need and just a matter of time till they get in.

My plan is to provide a clean circuit that would use the USB port on the phone to charge using the coil, while adding a new USB port into a phone case to still allow USB data and charging. However as the coil can create fluctuations in voltage and current, I want to have a setup that allows for it to be isolated while it is plugged in through USB.

Attached is just a quick circuit diagram I made using EveryCircuit, I need to refine it still, but just an example. Heck if you have the app rebuild it and you'll be able to see what it does. Left side is USB cable input, with a switch at top to simulate plugging in and unplugging, while the right is the phone side with the power source being the coil. The light/loads are to simulate the data lines and power lines and show whether the circuit works.

When I get the parts together I'll take pics and post a tutorial. I have some 3D modeling experience so I may even be able to design a custom case to put everything into.
 

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point45

New member
Mar 8, 2013
4
1
In what order are you putting the components? Phone, battery then coil. Or phone coil then battery? Basically is the coil between the hardware and battery, or is the coil between the back panel and battery.

I can see where the issues would arise if it is between the battery and hardware. Both would be giving off EM waves if the device is on. If it is between them, try moving the coil to between the back panel and the battery.

Right now I can't afford to try an internal mod where I could kill the phone if I screw up, so until a couple things settle down for me I will only be attempting an external mod that fits in a case. If I can get the design right I may be able to make it so there is still a USB port available.

*Edit*
I'm sourcing/pricing components right now and you've already given me the voltage output, but how about the current provided by the coil? What I'm planning involves building a small circuit that would short the D+ wire only when there is no USB cable connected.

the coil was sandwiched between the back case of the phone and the battery. The metal in the battery is influencing the flux going through the charging coil. The base is not always on, it only turns on when the charging coil is present. If not present the base seems to send out a pulse every so often to detect the presence of the charging coil inside the phone.

The issues arise once the battery is laid across the coil, the base begins to oscillate and the voltage begins to alternate. Also the coils seem to only work within a specific frequency range, but i dont have a signal generator or oscope to confirm this.

According to the battery charging app the base is putting out ~6-700mA to the phone with an 1A charger plugged into the base.
 

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    Hi,

    Signed up just to post my results so far.

    Ive gotten razr HD maxx to charge through the USB port using a touchstone pixi back cover.

    It works using the touchstone charging base but the usb wall wart that came with the razr hd. The amperage coming though was not enough using a motorola dedicated usb wall charger that came with my bluetooth headphones putting out 500mA. It charges a little slower using the induction charger. I need to figure out if this will work running off my cars electrical system as that is my main motivation for getting this to work.

    To get the phone to go into charging mode you have to either short out the USB data wires or connect the D+ wire to a 2v contact on the touchstone pixi circuit. Connecting the usb D+ to the 2v contact hopefully will allow me to hardwire this setup directly to the phone and leave the usb port free if, assuming I can find enough room inside for everything.

    The phone is charging right now on the touchstone base, estimate 2hr to full charge from 70%

    Im going to try and shove it all inside the phone tomorrow.

    I've been interested in getting a wireless charging solution for my phone, and while I have to look into it a bit more to figure out specifics for certain things, I think it may be possible to create a case that plugs into the USB port so we wouldn't void our warranties.
    Designing the case wont bee too much hassle, a micrometer and some 3D modeling software. However we need to find a way to get a micro usb connector that has a 90 degree bend in it to go into the port without causing any sort of scraping. Possibly have the right hand side of the case hinged and secured by snaps on top and bottom? or have the connector itself removable.

    So materials for a test setup would require:
    Touchstone components
    90 degree MicroUSB male connector
    Soldering gun
    Custom case


    I don't have the setup to do this available to me right now, however I think the biggest problem would be getting a connector small enough to keep from adding a lot of bulk to the side of the phone. Heck, with it only supplying .42 A at about 4.8 volts, it may not be inconceivable to group 2 in a case for faster charging. I haven't worked with the touchstone charger myself before, so I don't know their size.
    Anyways, food for thought, and a possible personal project once I get some more important things finished up.