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

Veritasium · explainer · Watch on YouTube

Information theory & signal processingRecreational & visual math

What it is

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.

Why Hacker News recommends it

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

  • 1 people recommended it
  • 1 different months
  • 0 strong recommendations
  • first 2024, last 2025

What HN commenters said

  1. “Derek Muller just did an interesting take on QR codes and their history”

    Interesting take on QR codes and their history

    nhatcher, 2024-10 · Recommendation · in “The history of the barcode”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: qr codes, error correction, barcodes, veritasium, encoding

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