Every blog post that took off on Hacker News, ranked by the votes of its best submission. 3,045 posts.
Two systems I know pretty well, Apache BookKeeper and Apache Kafka, were designed in the era of the spinning disk, the hard-drive or HDD. Hard-drives are good at sequential IO but not so good at random IO because of the relatively high seek times. No wonder then that both Kafka and BookKeeper were d
It’s surprisingly hard to give a good answer (the question was raised in this article). It depends on how you count, and the details are interesting (to me anyway). To not leave you hanging: …
I made a custom split mechanical keyboard! Because it's me, this involved things like contributing to a PCB design tool and discovering a ridiculously optimized way to read a keyboard matrix.
The Sound Blaster
Formlabs has recently launched the fourth edition of their flagship SLA printer line, the Form 4 . Of course, I jumped on the chance to do a teardown of the printer; I’m grateful that I was able to do the same for the Form 1 , Form 2 , and Form 3 generations. In addition to learning a lot from the process of tearing…
A look at AI Chip Architectures. NVIDIA, AMD, TPUs, Trainium, Groq, Cerebras.
T The problem Every once in a while I get involuntarily dragged into heat...
After all, why not? Why shouldn't I put a dumb Temu weather station on the Internet?
CPUs like to operate on data types such as uint8_t , uint16_t , uint32_t , and uint64_t . These data types can be viewed as integers modulo 2 8 , 2 16 , 2 32 , and 2 64 respectively. Addition and multiplication can be defined on these integers modulo 2 N in a way which is familiar to most people; for example, in…
Introduction Today’s post will take us in a slightly different direction than the last few. Today’s post will be about hooking up some Python code to the X-Plane flight simulator to enable development of an autopilot using PID (proportional-integral-derivative) controllers. I’ve been a fan of flight simulators for…
Verilog is the most commonly used language for hardware design in America (VHDL is more common in Europe). Too bad it's so baroque. If you ever browse the Verilog questions on Stack Overflow , you'll find a large number of questions, usually downvoted, asking “why doesn't my code work?”, with code that's not just a…
Recently this post from @Merocle caught my eye: I'm fixing my iFixit soldering station. I haven't used it for a long time and the battery has gone overdischarge. I hope it will come back to life. Unfortunately, there are no replacements available for sale at the moment. Devices with built-in rechargeable batteries…
It’s been about a year and a half since I wrote The Road to VR, and a… few… things have happened since then. * Facebook bought Oculus for a skadillion dollars * I have to continually read thinkpieces describing how the mere act of strapping a VR headset on your face
I made a custom guitar with hot-swappable pickups
Maybe putting the designer of the IBM PCjr in charge of this wasn't the best idea
Yesterday while surfing the ASCII highways of IRC (yes, IRC) a URL linking to a MacOS application scrolled by my screen. Unclack is a small MacOS utility which silences the microphone of the user when they’re typing. The purpose is to prevent the noise of typing being passed through to other participants when on a…
If you ask a software developer the question 'What are some example uses of semiconductors?', they'll probably mention 'silicon chips', like the ones found in processors or graphics cards. Indeed, this is probably the answer that I would have given just a couple years ago, but I have since become enlightened as to the…
There have been multiple generations of Macs. Apple has not really divided them up. 1. Original 680x0 Macs with 24-bit ROMs (ending with the SE/30, Mac II, IIx IIcx) 2. 32-bit-clean-ROM 680x0 Macs (starting with the Mac IIci) 3. NuBus-based PowerMacs (6100, 7100, 8100) 4. OldWorld-ROM…
I made a camera lens with an Iceberg
My main project is to create an executable spec of the Intel Architecture but, every now and then, I get to take a broader look at ISA specifications and think about the strengths and weaknesses of other ISA specs: what makes them work well; and what techniques they could borrow from other specifications. Earlier this…
Two new technologies – the modular smartphone and USB 3.1 – are set to radically accelerate the convergence of everything to a single, in-pocket device. In fact, they are so revolutionary that they will change the entire way we think about mobile computing as the iPhone did earlier this millennium.
Any ‘computer’ is made up of hundreds of separate computers plugged together, any of which can be hacked. I list some of these parts.
software solutions to hardware problems, and outbreaks of the future. © 2007 Jamie Zawinski <jwz@jwz.org>
I adore Nerves. I recently joined the core team. And I'll be doing my best to help people get along with this lovely way to co-mingle hardware and massively concurrent reliable software.
Perhaps the most interesting part of the open RISC-V instruction set architecture (ISA) is the vector extension (RISC-V "V"). In contrast to the average single-instruction multipe-data (SIMD) instruction set, RISC-V vector instructions are vector length agnostic (VLA). Thus, a RISC-V "V" CPU is flexible in choosing a…
I’m setting up an old Dell box (2011-era tech). I was migrating to some new boot drives and setting up grub on them again. Got to the point of deleting the old boot entries and adding new ones, and got an error like Could not prepare boot variable: No space left on device. Weird, because there weren’t that many EFI…
Today I released a video about how—and why—I 3D Printed my Grandpa and put him on my bottle of ketchup. Watch it here. I sculpted a bust of my Grandpa in high school, gave it to my grandparents, got it back after he died and my Grandma moved out of her house (I wrote a tribute to my 'Grandpa Charlie'), and I kept on…
Implementing the famous donut.c animation in actual silicon using CORDIC and ray marching
This article dives into my full methodology for reverse engineering the tool mentioned in this article. It's a bit longer but is intended to be accessible to folks who aren't necessarily advanced reverse-engineers.
However, many others have contributed in one form or another (newsgroup postings, email, laser parts, etc.). They are cited in the Acknowledgments and/or in the individual sections which contain their material. And, by the way, the name: "Sam's Laser FAQ" was more or less created by those who have read and commented…
