Inside the ComputerElectronics
The Transistor
A switch with no moving parts, and your phone has billions
Your phone holds billions of tiny switches, and not one of them moves. How do you flip a switch with no moving parts?
You'll find out
- What computers used before chips
- What two physicists built in 1947
- How small the switches have become
Why it matters
Every app, photo and message is billions of these switches flipping. Knowing one explains the whole machine.
Play this lesson
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