Recent content by pin0ut

Thanks! Resolution isn't actually a huge issue. The goal isn't to alter the field in a single pseudo-capacitor in the grid, but rather several of them. The iPhone's touchscreen controller has to deal with EMI and false positive touches, so it basically scans for "blobs" or small regions of...

I've been playing around with projected capacitive touchscreens - specifically, the iPhone's. I've attached a white paper that outlines the details, but the basic idea is as follows: An iPhone's touchscreen has a dielectric layer sandwiched between a layer of conductors arranged in rows and a...