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How speakers make sound
Check out Animagraffs on youtube > .
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 3,045 posts.
Hardware & Electronics
Any year
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The USB Situation
I write this from the latest MacBook Pro. I've been running this as my primary machine for almost a month. When I'm not grinding out the latest soon-to-be-relea
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Thoughts on Vision Pro
A month ago, I flew from London to NYC, paid $3500 for a Vision Pro headset at Apple Fifth Avenue, and flew back home. I’ve been using it every day since — here’s what I think. My background, for context: I’ve been working in AR for many years. I built...
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Cheap and simple way to mount a smartphone directly above a laptop display
with David Santiano, Deyin Mia Zhang, Xinran Azena Fan, and Yunru Casey Pan, NYU Shanghai; Barak Chamo, New York; Paolo Salvagione…
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A USB Fan Controller that now works under Linux
Relying on the built-in motherboard headers on server grade motherboards to reliably control fans with Linux has been a crapshoot since forever. I'm pleased to report that last summer the Corsair Commander Pro received native Linux kernel driver support in the 5.9 release.
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IoT Nixie Tubes
Every day I make a cup of coffee, organize a list of the things I want to do that day, and try to work through it. Every time I finish one of the tasks, I mark it as complete. By the end of the day, ideally there are no things left on the list, but if there are, I’ll move them into a backlog and start fresh the next…
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An History of Nvidia Stream Multiprocessor
I spent last week-end getting accustomed to CUDA and SIMT programming. It was a prolific time ending up with a Business Card Raytracer running close to 700x faster [1] , from 101s to 150ms. This pleasant experience was a good pretext to spend more time on the topic and learn about the evolution of Nvidia architecture…
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They don't make 'em like that any more: the 3.5mm headphone jack socket
What’s the real reason that cellphone manufacturers stopped fitting this simple, robust connector?
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The Genius of RISC-V Microprocessors
How the instruction set for RISC-V processors has been designed cleverly for both simplicity and high performance.
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This PCB is brought to you by Fable 5
An experiment to design a cute PCB (without touching any tools) in plain English
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Fairphone 6 wide camera experimental Linux support
The Fairphone 6 is an interesting target for mainline Linux and postmarketOS for a few reasons:
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The Whitworth Three Plates Method (2017)
A visual step-by-step guide to Joseph Whitworth’s three-plate method for creating very flat reference surfaces.
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Tihle: A new emulator targeting TI graphing calculators
Today I’m publishing tihle, a new emulator targeting TI graphing calculators (currently only the 83+, but maybe others later). There’s rather a lot to say about it, but here I will discuss the motivation for a new emulator and the state of the art followed by technical notes on the design and initial development…
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The World's current and next Innovations depend on a single country, Taiwan
The world’s current and next innovations depend on a single country: Taiwan. It’s probably one country you might never hear about, or perhaps confuse with its neighbor, Thailand, or even think it’s a part of China. I’ve been living in Taiwan for 3+ years, and am baffled that I never pay attention to semiconductors…
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Zusie – My Relay Computer
The story behind Zusie begins in May 2008, when I went on vacation to Berlin for a few days with a friend. As is my habit, I looked for interesting technical or scientific sites to visit, and the main thing to visit was the Technische Museum. I think I spent a full day day there, to the expressed dismay of my friend…
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I.MX7 M4 Atomic Cache Bug
Hardware Bugs can be frustrating, as they are likely the last place you would expect a bug. Unfortunately, they can and do happen. Most likely every CPU has a list of erratas. This post outlines th…
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Hacking a PC sound card to read temperature and liquid level sensors
Measure with Music: How to Read Analog Sensors Using a PC Sound Card
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Whatever happened to cheap eReaders?
Way back in 2012, The Guardian reviewed an eInk reader which cost a mere £8. The txtr beagle was designed to be a stripped-down and simplified eReader. As far as I can tell, it never shipped. There were a few review units sent out but I can't find any evidence of consumers getting their hands on one. Also, that £8…
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Exway doesn't care about USB-C conformity
Eric Park's website
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TI-83 Plus One More
Repair of a TI-83 Plus calculator with a non-working screen
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Turning an iPad Pro into a classic Macintosh
I’ve started work on the next in my 1-bit Woodblocks series: “Tekagami” (Ito Shinsui’s “Hand Mirror”). So it’s a good time to talk about how I turned an iPad...
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How x86_64 Addresses Memory
Update 2025-03-05 : @jxu has shared a collection of simplified examples that are even easier to follow than the original ones in this post.
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Durability: NVMe Disks
Durability is the guarantee that data can be accessed after a failure. It seems like this should be very simple: either your system provides durable data storage, or it does not. However, durability is not a binary yes/no property, and instead should be defined as the kinds of failures you want your data to survive…
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Build your own drink mixing robot
I built a robot that mixes drinks named Bar Mixvah. It utilizes an Arduino microcontroller switching a series of pumps via transistors on the physical layer, and the MEAN stack (MongoDB, Express.js, Angular.js, Node.js) and jQuery for the frontend and backend. In this post, I’ll teach you how I made it. You can follow…