Honis#WP
Member
Well, to try and get my mod working I introduced about a 1ohm resistance between VCC off the coil and the USB port. The max amperage from the Samsung AC/DC adapter is 1Amp so it dropped the voltage about 1V to roughly 4.6Volts into the phone. I measured to confirm the drop. I still got a wonky touch screen.
Doing some retesting at this lower voltage, the digitizer problem is most assuredly from the static magnetic fields coming from the TouchStone. Removing the stubs/magnets from around the coil greatly reduces the range of the effect. When they're in place they are extending the magnetic field which makes it all that much closer to the screen/digitizer.
These magnetic fields are not absorbed by a Faraday cage because they are static (think bar magnet and metal filings). The magnetic field coming off the coil is blocked because it oscillating magnetic fields (think of a sine wave) which are blocked by Faraday cages (the metal tetris piece is providing the blocking in 1 direction).
Knowing all of that I'm putting a close on my project. I don't want to take a TouchStone apart to remove the alignment magnets because there will only be friction from weight holding it in place and I'm thinking there will be more forgiving devices than my GS2 that this can be added too. (PSP, PS3 controllers, a DS, etc.)
Doing some retesting at this lower voltage, the digitizer problem is most assuredly from the static magnetic fields coming from the TouchStone. Removing the stubs/magnets from around the coil greatly reduces the range of the effect. When they're in place they are extending the magnetic field which makes it all that much closer to the screen/digitizer.
These magnetic fields are not absorbed by a Faraday cage because they are static (think bar magnet and metal filings). The magnetic field coming off the coil is blocked because it oscillating magnetic fields (think of a sine wave) which are blocked by Faraday cages (the metal tetris piece is providing the blocking in 1 direction).
Knowing all of that I'm putting a close on my project. I don't want to take a TouchStone apart to remove the alignment magnets because there will only be friction from weight holding it in place and I'm thinking there will be more forgiving devices than my GS2 that this can be added too. (PSP, PS3 controllers, a DS, etc.)
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