TED-Ed: Why a sausage can do what your gloves cannot | Charles Wallace and Sajan Saini

The video explores the evolution of touch screen technology, starting from its invention in 1965 to its widespread use in modern smartphones. It explains the differences between resistive and capacitive touch screens, highlighting their mechanisms and applications. The video also discusses how conductivity affects touch screen interaction, including challenges faced when using gloves or wet hands. It concludes with practical insights into alternative conductive materials that can activate touch screens.

Describe how the nodes in a capacitive touch screen function.

What happens when a smartphone is used with wet hands or gloves?