lcamtuf.substack.com

Latest posts

• Cursed circuits #5: capacitance multiplier

  Jul 05, 2026lcamtuf

  Capacitor vendors don't want you to know this! Save money on capacitors by spending more on other components

• All logic, no bite

  Jun 27, 2026lcamtuf

  This radio station gets many requests for treatises on formal logic.

• AI children's books, body horror edition

  Jun 26, 2026lcamtuf

  Last week, I posted a visual demonstration of the sameness of AI-generated content.

• The 100,000 whys of AI

  Jun 21, 2026lcamtuf

  One of the most painful arguments I keep having with fellow techies is the question of whether you can distinguish between human-written and AI-generated text.

• Getting silly with C, part &((int*)-8)[3]

  Jun 06, 2026lcamtuf

  Read on to uplevel your coding SKILLS.md.

• Weekend trivia: your process' memory is a file

  Jun 01, 2026lcamtuf

  The underappreciated gem of /proc/ /mem

• A nicer voltmeter clock

  May 16, 2026lcamtuf

  Sometimes, electronic circuit design is mostly about wood

• A breakthrough in C/C++ dependency management

  Apr 25, 2026lcamtuf

  Bringing a well-known programming language into the 21st century.

• The Secret Life of Circuits

  Apr 16, 2026lcamtuf

  Many of you follow this blog because of the regular features about electronic circuit design.

• Why I refrain from infosec punditry

  Apr 16, 2026lcamtuf

  If you know about my professional background, the most puzzling aspect of this Substack must be that I don’t use it to talk about my primary field of expertise: information security.

• Conway's Game of Life, in real life

  Mar 19, 2026lcamtuf

  When life gives you switches...

• How much of HN is AI?

  Mar 12, 2026lcamtuf

  TL;DR: As of June 2026, ~50% of daily top stories are about AI or generated by AI.

• Approximation game

  Feb 28, 2026lcamtuf

  The number 22/7 and the pigeon flock of Peter Gustav Lejeune Dirichlet.

• Unreal numbers

  Feb 15, 2026lcamtuf

  Reals are really weird.

• It's all a blur

  Feb 06, 2026lcamtuf

  Designing a slightly sneaky blur filter and then poking holes in it.

• You gotta think outside the hypercube

  Jan 26, 2026lcamtuf

  A closer look at the tesseract and the ways we can render it on the screen.

• See it with your lying ears

  Jan 10, 2026lcamtuf

  This blog has a history of answering questions that no one should be asking. Today, we continue that proud legacy.

• Cursed circuits #4: PLL frequency multiplier

  Dec 26, 2025lcamtuf

  How do you turn 1 MHz into 100 MHz? With magic, of course.

• Cursed circuits #3: true mathematics

  Dec 22, 2025lcamtuf

  Op-amp arithmetics, explained in a more accessible way

• Cursed circuits #2: switched capacitor lowpass

  Dec 04, 2025lcamtuf

  Still using resistors? Get on with the times.