How a transistor works

A voltage on the gate pulls electrons into a thin channel. Channel open: current flows, a 1. No channel: a 0.

13 min 60 XP

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So far a switch has been something you flip with a finger. But nobody's finger flips three billion switches a second inside a phone. We need a switch that is flipped by electricity itself. That switch is the transistor, and I'm made of a few billion of them.