Just curious if anyone else was thinking about modifying the Pre Touchstone back for the EVO. Obviously the intent here is to use the Palm Touchstone to hold/charge the EVO as easily.
It would appear easy enough to lift the coil / magents off of the touchstone back and place it on the back of the EVO battery cover. Wondering though of a good spot to wire the contacts in. Ill do a little probing tomorrow of the voltages and see if it is even possible to do this without opening the phone more than the batter cover.
Interesting idea. Doesn't the EVO have a curved back? Wouldn't that make placing it on the touchstone difficult?
Wonder if Seidio would be interested in making a back that would work with the touchstone? I'd pay for that in a heartbeat...
This would be pretty dope because I have a spare touchstone after selling my pre a few months back...
i will also help with this as i have everything i need
illogic6 said:
Interesting idea. Doesn't the EVO have a curved back? Wouldn't that make placing it on the touchstone difficult?
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the Pre has a very curved back, soo..... not really.
powermat is currently working on some replaceable batteries for several phones, which would bring there induction charging to a phone without the need of a special backplate, or case...
only problem will be the connectors
The voltage produced from the coil / ic is +5.5VDC when sitting on the touchstone. From looking at the http://s1.guide-images.ifixit.com/igi/hVm1pujhBWHaYT5X.huge inside, it would appear there are several contacts that could be used to tie that into the power system. I would probably want to route this into whatever is common with the usb port power and have to probe a little more when I get the device.
I started separating the coil from the battery cover and found that the coil/iron disks are larger than it would appear. They sit recessed into indentations in the plastic back. This may be a no go depending on the clearance of the battery door (ill get my EVO today and see)
It would be insanely nice if Sedio produced a compatible back, however, Im pretty sure Palm has that patented pretty well.
(image courtesy of iFixIt)
I finished. Used a couple of wirewrap wires to keep the depth down a little. Cover still fits a little loose though. Would be nice if someone could make a back with the same dimensional imprint (customevos / seidio / hint hint). Who needs a lego dock when you have this
zonyl said:
I finished. Used a couple of wirewrap wires to keep the depth down a little. Cover still fits a little loose though. Would be nice if someone could make a back with the same dimensional imprint (customevos / seidio / hint hint). Who needs a lego dock when you have this
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Can you take more pictures of the soldering on the EVO side of things? I transplanted the touchstone internals into my 2600mAh battery cover on my Pre.
npaulseth said:
Can you take more pictures of the soldering on the EVO side of things? I transplanted the touchstone internals into my 2600mAh battery cover on my Pre.
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This person made a far better guide than I could.
http://www.goodandevo.net/2010/06/h...rk-with-palm-touchstone-wireless-charger.html
Hello guys,
i found this on hackaday
http://hackaday.com/2010/07/28/inductive-cellphone-charging-without-voiding-warranty/
This guy manages to extract all needed electronics from a Palm Pixi backplate and modded everything into his HD2. Only problem is the metal backplate that interferes with the touchstone charger station.
Anyone got an idea on how to solve that?
Has anyone thought about stuffing the touchstone coil into the nexus4? It sounds stupid i know since the n4 already has wireless charging built in, but the chargers are expensive and hard to find while the touchstone chargers are cheap and plentiful.
peachpuff said:
Has anyone thought about stuffing the touchstone coil into the nexus4? It sounds stupid i know since the n4 already has wireless charging built in, but the chargers are expensive and hard to find while the touchstone chargers are cheap and plentiful.
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The Qi protocol requires that the receiver send a handshake to the transmitter to start charging. If a non-Qi device is on the plate, then it will do a start and stop every 20 sec to poll for the signal. I am working on changing the Touchstone coil to a Qi transmitter coil and see what happens. I received the Qi coil, Qi inductive charging sleeve (for testing) and waiting on a Palm touchstone sleeve. My concern is that the touchstone without the Qi communication on charging status may overheat the N4 if it doesn't stop the power transmission properly.
terracode said:
My concern is that the touchstone without the Qi communication on charging status may overheat the N4 if it doesn't stop the power transmission properly.
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People have put touchstone coil's in other phones and had no issues, i don't see how it would be any different here. There are 4 contact points that connect the qi coil and nfc on the rear cover, attach the touchstone coil to 2 of them and hope you can close the cover with everything inside.
peachpuff said:
People have put touchstone coil's in other phones and had no issues, i don't see how it would be any different here. There are 4 contact points that connect the qi coil and nfc on the rear cover, attach the touchstone coil to 2 of them and hope you can close the cover with everything inside.
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He's doing the opposite; he's replacing the coil in the touchstone charger with a QI charging coil.
I connected the Qi compliant coil to the Touchstone board and it didn't recognize the Qi receiver so it didn't start energy transfer. I then moved the thin wire coil that the Touchston uses to sense a Palm Receiver to above the Qi coil. The transmitter didn't start with a Qi receiver, but did recognize the Palm receiver and started energizing the coil. Issue was the voltage was very low due to the mismatched coils (Qi transmitter and TS receiver). I need to take apart the Touchstone receiver to see what it uses to activate the transmitter. More tinkering is needed.
I think QI controls the charging level from the phone, by communicating back to the charger. It may not be a good idea to disable this mechanism by swithing a charge coil on manually (though I'd think that the phone would not charge at all, then).
If you want to try, I think QI uses 141 KHz. Supply that to a coil at the correct power and see if it charges.
jutezak said:
I think QI controls the charging level from the phone, by communicating back to the charger. It may not be a good idea to disable this mechanism by swithing a charge coil on manually (though I'd think that the phone would not charge at all, then).
If you want to try, I think QI uses 141 KHz. Supply that to a coil at the correct power and see if it charges.
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Click to collapse
I am actually doing the opposite. The Qi coil is on the transmit side attached to the touchstone charger power board. I need a way of sending a proper signal to the Palm Touchstone so that it energizes the coil. The Qi receiver doesn't have the proper interface to send a signal to the Touchstone to power up.
$50 is hardly expensive.... Wall Mart wanted $50 for a plug in travel charger for my galaxy tablet. Just find the lg one.
Sent from my Nexus 4 using Tapatalk 2
Qi coil
terracode said:
I am actually doing the opposite. The Qi coil is on the transmit side attached to the touchstone charger power board. I need a way of sending a proper signal to the Palm Touchstone so that it energizes the coil. The Qi receiver doesn't have the proper interface to send a signal to the Touchstone to power up.
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Click to collapse
So are you able to replace the qi coil successfully to TS?
For someone who want's multiple docks around, $50 does add up. For someone like me who has 2 or more touchstone chargers laying around from previous mods/palm phones this would be useful.
I've tried to do the following to my Nexus 4, but couldn't get off the back cover without damaging the phone (I could get everything but one corner of the phone to pop open, I noticed I was beginning to damage the body a bit and stopped trying).
Mind you, the following needs to be used with a case; works best with rugged cases/hard cases.
If anyone is able to open their phone up you can try my following idea:
1. Remove the back of the phone
2..There should be 4 pins, 2 for NFC, and 2 for the QI coil.
3. Use a voltmeter to find out which pin is positive and which is negative.
-- I am not sure if the touchstone coil could fit INSIDE the phone, so I assumed it would not fit, and came up with this solution--
4. Using copper tape (if you've modded your GNEX before, you probably have some left over) stick it onto the pins, and lead them outside of the back cover, wrapping around so you see the copper tape on the OUTSIDE of the phone
5. Close the phone back up, the copper tape should now be hanging outside of the side of the phone.
6. Get your touchstone coil and tape/adhere it to the inside of your selected case.
7. Take your copper tape yet again and solder it to the leads of the touchstone coil, and position the copper tape so it touches the existing tape (from the nexus) when you put the case onto your phone.
That's it. The touchstone should be thin enough so that it doesn't interfere with the fitting of the case. This was the situation for my previous two mods with Galaxy Nexus's, the fit of the case was no problem. (Otterbox Commuter, and SGP Neo-Hybrid).
DDRFAN said:
For someone who want's multiple docks around, $50 does add up. For someone like me who has 2 or more touchstone chargers laying around from previous mods/palm phones this would be useful.
I've tried to do the following to my Nexus 4, but couldn't get off the back cover without damaging the phone (I could get everything but one corner of the phone to pop open, I noticed I was beginning to damage the body a bit and stopped trying).
Mind you, the following needs to be used with a case; works best with rugged cases/hard cases.
If anyone is able to open their phone up you can try my following idea:
1. Remove the back of the phone
2..There should be 4 pins, 2 for NFC, and 2 for the QI coil.
3. Use a voltmeter to find out which pin is positive and which is negative.
-- I am not sure if the touchstone coil could fit INSIDE the phone, so I assumed it would not fit, and came up with this solution--
4. Using copper tape (if you've modded your GNEX before, you probably have some left over) stick it onto the pins, and lead them outside of the back cover, wrapping around so you see the copper tape on the OUTSIDE of the phone
5. Close the phone back up, the copper tape should now be hanging outside of the side of the phone.
6. Get your touchstone coil and tape/adhere it to the inside of your selected case.
7. Take your copper tape yet again and solder it to the leads of the touchstone coil, and position the copper tape so it touches the existing tape (from the nexus) when you put the case onto your phone.
That's it. The touchstone should be thin enough so that it doesn't interfere with the fitting of the case. This was the situation for my previous two mods with Galaxy Nexus's, the fit of the case was no problem. (Otterbox Commuter, and SGP Neo-Hybrid).
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Was this simply the metal coil or the entire assembly including board from a Pre charging cover? very Interested as I have a Nexus 4 I will be receiving Monday
singularityq said:
Was this simply the metal coil or the entire assembly including board from a Pre charging cover? very Interested as I have a Nexus 4 I will be receiving Monday
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You should only have to replace the metal coil.
OP, a simple google search would have sufficed http://www.webosnation.com/nexus-4-gains-touchstone-charging-thanks-clever-hacking
Does one of these exist? I have a cheap TPU S-line case from ebay that I bought when the phone was first released. It works with the QI charger but it does not keep the dust out of the ports.
I bought two cheapies off ebay to test if something a little thicker would work with the QI charger and so far nothing does. Seems that any case that covers ports are thick and may not work with the QI charger.
BTW its the Energizer charger, not the official Google one.
Have you considered just getting a microusb port cover? http://www.moddiy.com/products/modDIY-Micro%2dUSB-Protective-Jack-Cover.html for example
ziddey said:
Have you considered just getting a microusb port cover? http://www.moddiy.com/products/modDIY-Micro%2dUSB-Protective-Jack-Cover.html for example
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I have but if a case exists that will work then I would like to give that a shot first. I notice the covers for the cases are snug fit so it wont allow dust in at all when a plug may leave room between it and the case. I work in a very dirty environment and would like to keep the phone itself as clean as possible.
https://www.ifixit.com/Teardown/Nexus+6+Teardown/32877?utm_medium=email&utm_campaign=Nexus+6+Teardown&utm_content=Nexus+6+Teardown+CID_4c0816d3ad3ab173f994a26d0641e23f&utm_source=CampaignMonitor&utm_term=Nexus%206%20Teardown
Looks like the back cover is easy to remove. Nothing attached to it so if there are 3rd party covers to be made. replacing it should be easy but may be a one time thing as not sure how well the back would stick again once the adhesive has been compromised.
As I suspected, the qi charging coils are on the battery, not the back cover, which explains why some qi chargers are having difficulty with the N6, especially if it's in a case. The slight curve of the back, and that secondary cover mean that the coils will be a bit farther away from the charger as, say, those in a N5 would.
Also, no magnets (or even metal plates) around the qi charging coils. Now we know why the Nexus Charger won't stick to it (and why those mobile wireless charging docks won't hold it). Looks like there might be enough room to add some though, so that's one possibility.
jt3 said:
As I suspected, the qi charging coils are on the battery, not the back cover, which explains why some qi chargers are having difficulty with the N6, especially if it's in a case. The slight curve of the back, and that secondary cover mean that the coils will be a bit farther away from the charger as, say, those in a N5 would.
Also, no magnets (or even metal plates) around the qi charging coils. Now we know why the Nexus Charger won't stick to it (and why those mobile wireless charging docks won't hold it). Looks like there might be enough room to add some though, so that's one possibility.
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I am not even sure you would have to add magnets. You might be able to get away with putting some small metal plates under the back cover for the magnetic docks.