Re: [GUIDE] Galaxy Nexus MOD for Palm Touchstone without solderin
Just wanted to chime in with another success story
My configuration is:
-charging coil outside the phone, on the inside of a diztronic case.
-Copper tape traces to the edge of the case
-I extended the pogo contacts with copper tape, scratched a small hole in the tape through to the pogo contact, and put a small bit of solder on the copper tape. This makes the tape function as a solder pad, and there should be minimal solder on the pin itself. Should be very easy to reverse if needed.
Connection is pretty bombproof so far, and I love the convenience of this mod. Mine does charge pretty slowly this way, but with Pandora streaming bluetooth audio, and GPS navigation running, I get a percent charge every 4 or 5 minutes. Good enough for car trips.
NFC still works perfectly with the coil mounted as high as possible in the case.
The compass is severely impacted, but I can take the case off whenever I need an accurate compass.
Thanks for the instructions and all the feedback on this thread. If anyone is nervous about this, remember, it is an open source phone, hack it
EDIT:
Added some pictures and procedures
Materials:
Palm touchstone and Pre battery back
Electrical tape (clear tape used in the pictures below for illustration purposes)
Copper tape with conductive adhesive (it really does make this go easier to get conductive adhesive type.)
Eyeglass screwdriver
Solder and soldering iron
1. Removed the palm coil per ohiomoto's instructions
2. Placed stronger magnets inside the diztronic case, and aligned them by placing the diztronic case on the touchstone. Taped magnets in place
3. Used a multimeter to align the coil onto the inside of the case, finding the spot where I saw a consistent 5.6 volts. Taped the coil in place
4. Soldered 2 pieces of copper tape to the leads on the coil. Attached additional tape pieces to direct current to either side of the pogo pin cutout in the side of the case. Put electrical tape over the copper tape on the back of the case. Leave the side of the case untaped.
Fig1
Fig2
5. Attached 2 pieces of copper tape over the top and bottom pogo pin connector. I angled these diagonally to meet up with the copper tape on the inside of the case.
Fig3
6. Place phone in case
7. To test, I used a eyeglass screwdriver to press the tape into the pogo pin connector as much as possible. At this point, hopefully the phone will charge. Mine was fine like this for a couple days, but the connection would start to get flaky. Pressing the tape into the pogo connector again usually establishes a good connection again.
8. If step 7 tests positive, and you are happy with the results, a couple drops of solder over the pogo pin connectors will make the connection to the phone much more stable. Use the eyeglass screwdriver to etch away some of the copper tape over the pogo pin connector. You should see the gold connector underneath. Put a tiny ammount of solder on this hole, connecting the pogo connector with the top layer of the copper tape. Do this for both top and bottom pins. Fig3 above is the final result.
NOTES:
-The adhesive backed tape seems to have plenty of contact when attached to other pieces of tape, but the surface area of the pogo connectors is not enough to provide a stable connection
-I added additional magnets on top of the magnets in step 2, to increase its adherence to the mount. Your magnets may be stronger. Mine were cheap 1/32" thick neodynium magnets I found on amazon. Pretty powerful, but the weight of the phone and the case was a little much. Doubling the magnets makes it stronger.
-Figures above are taped with clear packing tape. I have since retaped everything with electrical tape.
-I know ohiomoto's instructions were for a no solder installation. My instructions do not require soldering, but it is advised unless you want to constantly repair the connections. Do what I did, try it for a few days without solder to see if the charge speed and convenience works for you. Then solder only if you see that it is necessary. You can try this out without cracking your phone open.
Once again, thank you, ohiomoto, for putting your instructions up. I am glad to see so much feedback from the community.