Your finger isn't pressing buttons—it's changing electric fields. Discover the invisible grid that detects every touch.
Chapter 1 · Start here
Conductivity: Your Finger As Conductor
Discover why your finger works on touchscreens but your glove doesn't—it's all about electrical conductivity
Chapter 2 · Start here
Capacitive Sensing: Electric Field Basics
Learn how invisible electric fields detect your finger's presence without any physical pressure
Chapter 3 · Start here
The Invisible Grid: Coordinate Detection
Uncover the hidden mesh of sensors that pinpoints exactly where you touch with millimeter precision
Chapter 4 · Start here
Multi-Touch: How Two Fingers Don't Confuse It
Understand how modern touchscreens track multiple fingers simultaneously without ghost touches
Chapter 5 · Start here
Why Gloves Don't Work And Stylus Pens Do
Explore how material properties enable or block touch detection—and how to work around it
Chapter 6 · Start here
Design Your Own Touch Interface
Apply everything you've learned to design custom touch gestures and interfaces for real-world challenges