HackerTube
HomeLongsLikedHistoryWatch laterCategoriesPlaylistsSettings

I built a QR code with my bare hands to see how it works

Veritasium1 HN recommender · recommended in 1 month, 2024-2025
YouTube
9.7M views · 2 years ago · explainer · evergreen

Veritasium builds a QR code by hand to explain how it works. It covers the history of Morse code and barcodes, how QR codes encode data, why damaged codes still scan, and how safe they are.

HN points to it as a recent, well-made explanation of QR code structure and error correction.

Information theory & signal processingRecreational & visual math#qrcodes#errorcorrection#barcodes#veritasium#encoding

3 comments from Hacker News

@gukov2025 · in “Show HN: Qrkey – Offline private key backup on paper”

Yep, if I'm using a physical medium like paper I want to allow for some degradation. Here's a Veritasium video on QR codes: ▶ this video

CitesView on HN
@throw0101c2024 · in “Creating a QR Code step by step”

Recent Veritasium video on the topic, "I used to hate QR codes. But they're actually genius": * ▶ this video

CitesView on HN
@nhatcher2024 · in “The history of the barcode”

Derek Muller just did an interesting take on QR codes and their history on his popular channel veritasium: ▶ this video

RecommendsView on HN
How Imaginary Numbers Were Invented23:29

How Imaginary Numbers Were Invented

Veritasium
22.7M views • 5 years ago
The Strange Math That Predicts (Almost) Anything32:32

The Strange Math That Predicts (Almost) Anything

Veritasium
13.1M views • 1 year ago
But what are Hamming codes? The origin of error correction20:05

But what are Hamming codes? The origin of error correction

3Blue1Brown
3.1M views • 6 years ago
The Most Underrated Algorithm26:33

The Most Underrated Algorithm

Veritasium
10.8M views • 4 years ago
DEF CON 29 - Richard Henderson - Old MacDonald Had a Barcode, E I E I CAR43:40

DEF CON 29 - Richard Henderson - Old MacDonald Had a Barcode, E I E I CAR

DEFCONConference
18K views • 5 years ago
Imaginary Numbers Are Real [Part 1: Introduction]5:47

Imaginary Numbers Are Real [Part 1: Introduction]

Welch Labs
8.6M views • 11 years ago
Quantum Entanglement & Spooky Action at a Distance9:16

Quantum Entanglement & Spooky Action at a Distance

Veritasium
4.5M views • 11 years ago
The Most Powerful Computers You've Never Heard Of20:13

The Most Powerful Computers You've Never Heard Of

Veritasium
13.7M views • 4 years ago
Quantum Computing for Computer Scientists1:28:23

Quantum Computing for Computer Scientists

Microsoft Research
2.2M views • 8 years ago
Can you fit a whole game into a QR code?20:03

Can you fit a whole game into a QR code?

MattKC
9M views • 6 years ago
Quantum Expert Insight: Peter Shor31:18

Quantum Expert Insight: Peter Shor

Qiskit
607K views • 5 years ago
The Universe is Hostile to Computers23:03

The Universe is Hostile to Computers

Veritasium
26.5M views • 5 years ago
Stephen Wolfram's Introduction to the Wolfram Language12:56

Stephen Wolfram's Introduction to the Wolfram Language

Wolfram
924K views • 12 years ago
Flaw in the Enigma Code - Numberphile10:58

Flaw in the Enigma Code - Numberphile

Numberphile
5.4M views • 13 years ago
Fantastic Quaternions - Numberphile12:25

Fantastic Quaternions - Numberphile

Numberphile
1.1M views • 10 years ago
Clickbait is Unreasonably Effective19:25

Clickbait is Unreasonably Effective

Veritasium
8.3M views • 5 years ago
How Wrong Is VERITASIUM? A Lamp and Power Line Story19:17

How Wrong Is VERITASIUM? A Lamp and Power Line Story

ElectroBOOM
4.4M views • 4 years ago
Math's Fundamental Flaw34:00

Math's Fundamental Flaw

Veritasium
30.8M views • 5 years ago
How Quantum Computers Break Encryption | Shor's Algorithm Explained17:31

How Quantum Computers Break Encryption | Shor's Algorithm Explained

minutephysics
3.4M views • 7 years ago
My Video Went Viral. Here's Why23:43

My Video Went Viral. Here's Why

Veritasium
5.6M views • 7 years ago