Skip to content
HomeVideos
AllLongsCategoriesPlaylists
BooksBlogsPodcasts
HistoryListsWatch laterLiked videosFollowing

The videos, books, blogs and podcasts Hacker News keeps recommending, all in one place.

VideosBooksBlogsPodcastsAboutPrivacySettings

Data from Hacker News, HackerTube, HackerBooks, HackerBlogs and Open Library. Credits · Not affiliated with Y Combinator.

HomeVideosBooksBlogsPodcasts
Ctrl K

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

    Veritasium

    1 HN recommender · recommended in 3 months, 2024–2025

    YouTube

    35:13 · 9.7M views · Sep 30, 2024

    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.

    Mathematics & Theoretical CSInformation theory & signal processingRecreational & visual math
    1. 23:29
      How Imaginary Numbers Were InventedVeritasium23M views • 5 years ago
    2. 20:05
      But what are Hamming codes? The origin of error correction3Blue1Brown3.1M views • 6 years ago
    3. 26:33
      The Most Underrated AlgorithmVeritasium11M views • 4 years ago
    4. 32:32
      The Strange Math That Predicts (Almost) AnythingVeritasium13M views • 1 year ago
    5. 9:16
      Quantum Entanglement & Spooky Action at a DistanceVeritasium4.5M views • 11 years ago
    6. 1:28:23
      Quantum Computing for Computer ScientistsMicrosoft Research2.2M views • 8 years ago
    7. 5:47
      Imaginary Numbers Are Real [Part 1: Introduction]Welch Labs8.6M views • 11 years ago
    8. 43:40
      DEF CON 29 - Richard Henderson - Old MacDonald Had a Barcode, E I E I CARDEFCONConference18K views • 5 years ago
    9. 20:13
      The Most Powerful Computers You've Never Heard OfVeritasium14M views • 4 years ago
    10. 34:00
      Math's Fundamental FlawVeritasium31M views • 5 years ago
    11. 1:07:22
      Invited Talk - Guy SteeleClojureTV39K views • 9 years ago
    12. 19:25
      Clickbait is Unreasonably EffectiveVeritasium8.3M views • 5 years ago
    13. 20:03
      Can you fit a whole game into a QR code?MattKC9M views • 6 years ago
    14. 12:56
      Stephen Wolfram's Introduction to the Wolfram LanguageWolfram924K views • 12 years ago
    15. 10:58
      Flaw in the Enigma Code - NumberphileNumberphile5.4M views • 13 years ago
    16. 42:43
      "Propositions as Types" by Philip WadlerStrange Loop Conference144K views • 11 years ago
    17. 19:17
      How Wrong Is VERITASIUM? A Lamp and Power Line StoryElectroBOOM4.4M views • 4 years ago
    18. 31:18
      Quantum Expert Insight: Peter ShorQiskit607K views • 5 years ago
    19. 17:16
      Eigenvectors and eigenvalues | Chapter 14, Essence of linear algebra3Blue1Brown6.4M views • 10 years ago
    20. 31:51
      Visualizing the 4d numbers Quaternions3Blue1Brown5.6M views • 8 years ago

    3 comments from Hacker News

    1. @nhatcherOct 2024· 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
    2. @gukovJun 2025· 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
    3. @throw0101cNov 2024· 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