Capacitive Touch

A touch detection technology that works by measuring changes in electrical capacitance when a conductive object, such as a human finger, comes near or contacts an electrode surface. The finger and electrode form a capacitor whose capacitance changes upon contact, and this change is detected by a sensor controller. Capacitive touch is widely used in smartphones and tablets, and in assistive technology it enables interactive tactile objects like 3D printed maps to respond to touch without mechanical buttons, preserving the tactile surface integrity important for blind users.