How do touchscreens work?

T1Covered by 1 source · first reported by Raspberry Pi / Arduino / Adafruit at 28 Oct, 20:32 UTC

Shri Khalpada walks through the two main kinds of touchscreen, with interactive demos, at PerThirtySix. Resistive screens stack two conductive layers with spacer dots between them. The controller puts a voltage slope across one layer and reads the other. Press down and the layers meet at one point…