Coders · Ages 13–16· 8-bit

The Transistor: the Switch that Changed Everything

Every gate, every memory cell, every pixel of every program ends in the same device: a switch made of silicon with no moving parts. Watch electrons open one in 3D, build logic gates out of pairs of them, and close a loop so that a circuit remembers.

3 lessons 36 min 175 XP

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Lessons

1🔬How a transistor worksA voltage on the gate pulls electrons into a thin channel. Channel open: current flows, a 1. No channel: a 0.13 min60 XP
2🔧From transistors to gatesPair a transistor that turns on with 1 with one that turns on with 0, and you get logic gates that barely waste power.12 min60 XP
3🧷A circuit that remembersFeed a gate's output back into its own input and the circuit holds its value. That loop is one bit of memory.11 min55 XP