Just use the ground and 5v lines from the USB port. The touchstone back outputs 5v. I did this on my evo, and am looking to do it on my epic now also. google for a mcro USB pinout and figure out which pins are what. I know that the far left and right pins are negative and 5v, but i dont remember which is which.
This is one of the best ideas. I hope it can be done because I also have two Touchstone chargers
Just use the ground and 5v lines from the USB port. The touchstone back outputs 5v. I did this on my evo, and am looking to do it on my epic now also. google for a mcro USB pinout and figure out which pins are what. I know that the far left and right pins are negative and 5v, but i dont remember which is which.
This is all too complicated for the end user, maybe somebody should just reproduce this in like a battery pack. I would be willing to pay 20 or more for a mod like this. Just saying...
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i think the touchstone and aftermarket battery cover cost at least 70 dollars alone.
The technology behind it is dead simple though. It would be trivial to introduce something like this built into a battery pack. IIRC, the voltage on the receiving coil is Vr = Vs * (Cs / Cr), where Vr is the voltage on the receiving coil, Vs is the voltage on the sending coil (the touchstone base) and Cs and Cr are the number of loops in the source and receiving coils.
Therefore it would be easy to make a coil that grabbed 3.6V from the 5V touchstone and fed it directly into the battery. The only problem is that the coil plus voltage protection circuitry inside of the battery would reduce the amount of space that you could actually use for the battery. Considering how small batteries in cell phones already are, even making them a sliver thinner to fit the coil inside of the battery pack would mean a drastic drop in battery capacity.
To the OP: did you have to break any stickers to pull the circuit board out?
The compass should work fine. The metal disks on the palm back cover are not magnetic. I believe they're just iron disks...