lcamtuf

lcamtuf :verified: :verified: :verified: (@lcamtuf@infosec.exchange) 480 Posts, 305 Following, 11.6K Followers ·

OK, after a year, I'm done with Bluesky. I might be using it wrong, but I get very little human interaction here and my feed consists 100% of outrage politics.

I'm on Mastodon (infosec.exchange/@lcamtuf), Twitter, or can be reached at lcamtuf@coredump.cx. I also write at lcamtuf.substack.com.

Cursed circuits #4: PLL frequency multiplier How do you turn 1 MHz into 100 MHz? With magic, of course.

Cursed circuits #4: PLL frequency multiplier
lcamtuf.coredump.cx/blog/pll/

DACs and ADCs, or there and back again A look at how digital-to-analog and analog-to-digital converters work - from resistor ladders to delta-sigma modulation.

I recently refreshed my article on analog-to-digital and digital-to-analog conversions. Did you know that there are many different ways to convert analog voltages to bits and bytes, and that some of the methods are quite... unhinged?

Check it out: lcamtuf.coredump.cx/blog/convers...

Cursed circuits #3: true mathematics Op-amp arithmetics, explained in a more accessible way

Cursed circuits 3: true mathematics
lcamtuf.coredump.cx/blog/true/

New mini display

Cursed circuits #2: switched capacitor lowpass Still using resistors? Get on with the times.

Cursed circuits #2: switched capacitor lowpass - lcamtuf.coredump.cx/blog/switched/

Cursed circuits: charge pump voltage halver There's plenty of circuits that are hard to understand because they're complicated. And some that are hard to make sense of because they seem too simple.

Cursed circuits: voltage halver lcamtuf.coredump.cx/blog/halver/

It's hard to build an oscillator Especially if you want it to work.

It's hard to build an oscillator: lcamtuf.coredump.cx/blog/oscilla...

Me: I want to have more friends

Tech companies:

When it comes to writing, LLMs have won As a middling author, I find it fairly easy to sniff out LLM-generated articles.

When it comes to writing, LLMs have won - lcamtuf.coredump.cx/blog/llm-win/

Some time ago, I discovered that you can buy stuff like kitchen cleaner as a 64x concentrate (I think it's used by hotels, restaurants, etc). One small bottle of concentrate easily lasts 2 years, zero waste.

You can also buy stuff like shampoo in gallon jugs for hair saloons.

I had it coming

I know, I know.

The joke guy - I'm pretty sure he's a real infosec person with a fairly long trail on the internet. And he doesn't seem to be selling anything. Just drive-by LLMing.

Dunno, just... why

What's the deal with Euler's identity? Untangling a cursed formula from 1748.

What's the deal with Euler's identity? lcamtuf.coredump.cx/blog/euler/?b

Things you can do with diodes Paying homage to the component we usually don't think about.

Things you can do with diodes: lcamtuf.coredump.cx/blog/diodes/?b3

Shows your lack of skill! Simple insults don't work, gotta either threaten harm or find some specific way undermine the recipient's self-worth

You know, life used to be more fun in the 1930s

Weekend projects: Chicken Squisher 3000 If it clucks like a duck...

Weekend projects: Chicken Squisher - lcamtuf.coredump.cx/blog/squisher/

October is Cybersecurity Awareness Month! Please be aware of cybersecurity. If you encounter cybersecurity, DO NOT APPROACH IT. Back away slowly. Protect children and pets. Make noises to scare it away.

Today I needed a bit of code, but instead of asking an LLM I tried writing it myself and wow, this could be a new paradigm

OK, here it is - the latest in captcha technology: lcamtuf.coredump.cx/captcha/

Zombies Interior of an abandoned, boarded-up convenience store.

Zombies: lcamtuf.coredump.cx/blog/zombies/?n2

How has mathematics gotten so abstract? Georg Cantor's turtles, Giuseppe Peano as a software engineer, and other tales of from the kingdom of the infinite.

How has mathematics gotten so abstract? lcamtuf.coredump.cx/blog/abstract/?1

My wife asked me some time ago to build an automated door opener / closer for the coop, and needless to say, our design firm takes this very seriously

The joys of rural living

Boss: hey Bob, our users are asking for an API to determine if a video can be played in the browser.

Bob: yeah, I get it, but this is really complica --

Boss: go on now, git! You'll figure it out.

Bob: [muttering to himself]

The latest

Folks, we have the best π In the past couple of months, I published a number of articles on recreational math.

Folks, we have the best π: lcamtuf.substack.com/p/folks-we-h...