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Adventures using and repairing an X131e laptop from 2011
This article covers several repairs, one including reverse engineering the BIOS to allow replacement parts. Feel free to scroll down and skip to this content.
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286 vs. 386SX
The 386sx wasn't much of an upgrade from the 286, but was popular for a time. Let's take a look at the 286 vs 386sx, and what the SX offered.
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Reverse-engineering a vintage power supply chip from die photos
I recently did a PC power supply teardown so I figured it would be interesting to go deeper and see what happens inside the power supply'...
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Atlas robot does parkour
By training Atlas to maneuver its way through complex parkour courses, our engineers push the humanoid robot to its limits.
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Introducing the PineNote
This month brings news that many of you have been waiting years for - we’re introducing the PineNote, a high-end e-ink device based on the powerful Quartz64 single board computer. But the good news doesn’t end here, the PinePhone keyboard has entered production, developers have begun work on PinePhone’s back cases…
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JAMMA Video Standard
Everyone had their weird pandemic hobby, right? Well, mine is that I bought an arcade video game. Not the whole cabinet - just a board, to hook up ...
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Second IC
In 2018 I made the first lithographically fabricated integrated circuits in my garage fab. I was a senior in high school when I made the Z1 amplifier, and now I’m a senior in college so there are some long overdue improvements to the amateur silicon process. The Z1 had 6 transistors and was a great test chip to…
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Uptime Lab's CM4 Blade Adds NVMe, TPM 2.0 to Raspberry Pi
A few weeks ago, I received two early copies of Uptime.Lab's CM4 Blade. The Blade is built for the Raspberry Pi Compute Module 4, which has the same processor as the Pi 4 and Pi 400, but without any of the built-in IO ports. You plug the CM4 into the Blade, then the Blade breaks out the connections to add some…
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Where are the robotic bricklayers?
When researching construction, you invariably discover that any new or innovative idea has actually been tried over and over again, often stretching back decades.
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Apple iPhone charger teardown: quality in a tiny expensive package (2012)
This article is now available in Vietnamese Bộ sạc iPhone của Apple . Disassembling Apple's diminutive inch-cube iPhone charger reveals ...
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Ultra fast Thunderbolt NAS with Apple M1 and Linux
In this post I discuss how you can upgrade a NAS Server by adding Thunderbolt 3 for lightning fast connectivity at 20 or 40Gbps. This particular implementation is specific to an Apple Mac Mini M1 and
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Google Tensor SoC debuts on the new Pixel 6 this fall
Google Tensor is our first custom-built SoC specifically for Pixel phones, and it will power the Pixel 6 and Pixel 6 Pro later this fall.
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The journey to controlling external monitors on M1 Macs
When M1 Macs were launched, a new GPU with iOS-like architecture started driving the external monitors. This meant that the old method for controlling monitors using DDC wouldn't work anymore. Apps like Lunar and MonitorControl had to find other ways to change the brightness of the monitors.
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Reprogramming a Sennheiser Microphone
I'm somehow interested in audio production. But not it more my pet hobby, nothing that would generate decent income. This means I usually do...
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My Fanless OpenBSD Desktop
After the disappointment of my X1 Nano and learning that all future Intel "Evo"-branded laptops would lack S3 suspend, I started thinking about returning to my M1 MacBook full-time or building an OpenBSD desktop. I chose the latter, building my first desktop machine in many years.
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New algorithm flies drones faster than human racing pilots
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Starlink review, four months in
SpaceX's Starlink internet service uses satellites in low-earth orbit to provide high-speed Internet to underserved parts of the world, especially places without easy access to cable or fiber. SpaceX's Starlink beta opened up in my area, so I installed Dishy—that's the nickname for the large white satellite dish…
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GPU Architecture Types Explained
The behavior of the graphics pipeline is practically standard across platforms and APIs, yet GPU vendors come up with unique solutions to accelerate it, the two major architecture types being tile-based and immediate-mode rendering GPUs. In this article we explore how they work, present their strengths/weaknesses, and…
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Don’t Let Police Arm Autonomous or Remote-Controlled Robots and Drones
Whether controlled by an artificial intelligence or a remote human operator, armed police robots and drones pose an unacceptable threat to civilians. The ongoing revolution in the field of robotics requires us to act now to prevent a new era of police violence.
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The Alexander: Why did you build such a long piano?
It occurred to me that long bass strings sounded better. When I was 14 I asked my piano teacher how long a bass a string would need to be if it had no copper on it at all. The answer was “Adrian the string would be so long it would go on for ever!” so with this in mind I did an experiment where I could find that…
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Building a Curve25519 Hardware Accelerator
Note: this post uses a $\LaTeX$ plugin to render math symbols. It may require a desktop browser for the full experience…
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Where’s the Apple M2?
DPReview just published Apple still hasn't made a truly “Pro” M1 Mac – so what’s the holdup? Following on the good performance and awesome power efficiency of the Apple M1 , there’s a hungry background rumble in Mac-land along the lines of “Since the M1 is an entry-level chip, the next CPU is gonna blow everyone’s…
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Automated Hydroponic System Build (2020)
Hydroponic farming is a method of growing crops without soil, with the main benefits of environmental and nutrient control, water conservation, and reduction of labor. This technique relies on a number of technologies that the principles of automation can be applied in order to improve yield and consistency. In this…
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Rethinking software testing: perspectives from the world of hardware (2019)
The conventional view of Software Testing The hardware and software worlds may seem poles apart, and in many ways, they indeed are. But there’s a wealth of knowledge that each can learn from the ot…
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Nicole gets a real computer – the Microsoft Z80 SoftCard (2020)
So there I was, very happy with my Apple ][plus. But then I saw someone on the internet post, and it seems that my Apple is an overpriced box with a toy micr...