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Exploring How Computers Work

An 18-minute video by Sebastian Lague, on the From scratch shelf. It came up in r/Unity3D, in a thread called “Inspired by the recent Sebastian Lague video, I created a logic simulator in Unity. Here's the start of an ALU.”. It is pitched at introductory level.

Sebastian Lague, Video, 18 min, 2020, on the From scratch shelf

A little exploration of some of the fundamentals of how computers work. Logic gates, binary, two's complement; all that good stuff!

Study notes

Introductory, Built from scratch. Step 1 of 10 in How a computer works

Helpful first

• Basic arithmetic

What it builds

• Represent quantities with binary states.
• Combine simple logic gates into operations.
• Separate a simulated circuit from the behaviour it implements.

Useful moments

• 3:03Logical building blocks in the simulation
• 5:12Place value and binary counting

Check yourself: How could a few simple gates be combined to add two binary numbers?

Next in the path: How do Transistors Build into a CPU? How do Transistors Work?

Notes are based on metadata, Reddit context and selected English caption passages. They are not a review of every claim in the video.