today's leftovers
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Open Hardware/Modding
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Ken Shirriff ☛ Reverse-engineering an analog Bendix air data computer: part 4, the Mach section
In the 1950s, many fighter planes used the Bendix Central Air Data Computer (CADC) to compute airspeed, Mach number, and other "air data". The CADC is an analog computer, using tiny gears and specially-machined cams for its mathematics. In this article, part 4 of my series,1 I reverse engineer the Mach section of the CADC and explain its calculations. (In the photo below, the Mach section is the middle section of the CADC.)
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Jeff Geerling ☛ Building an efficient server-grade Arm NAS
My power budget for this machine is around 100W idle, and right now it sits just over 150W. I think I can get it down below 100W, and some of that will be achieved with hardware tweaks (and a few possible substitutions), and maybe some in software.
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Games
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Wouter Groeneveld ☛ Pimp Your Board Games
It makes little sense to give any random board game that occupies a spot in your shelf the personal uplifting treatment—no, they have to be the most enjoyable ones, the most component-y ones, the ones where the publisher decided to just chuck in a ton of plastic bags and let the players fumble about every time they want to set up the game, the ones where despite all these irritating absences of quality or traces of inlays, you still want to get out and play. For these board games, I always have something special planned: the Brain Baking FIMO-n-Inlay treatment™©!
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Applications
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TecMint ☛ 8 Best MySQL/MariaDB GUI Tools for GNU/Linux in 2024
MySQL is one of the most widely-used open-source relational database management systems (RDBMS), that has been around for a long time.
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Kernel Space
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Michael Stapelberg ☛ Minimal Linux Bootloader debugging story 🐞
I maintain two builds of the Linux kernel, a linux/arm64 build for gokrazy, my Go appliance platform, which started out on the Raspberry Pi, and then a linux/amd64 one for router7, which runs on PCs.
The update process for both of these builds is entirely automated, meaning new Linux kernel releases are automatically tested and merged, but recently the continuous integration testing failed to automatically merge Linux 6․7 — this article is about tracking down the root cause of that failure.
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Audiocasts/Shows
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Jupiter Broadcasting ☛ Will it Nixcloud? | LINUX Unplugged 549
Deploying Nextcloud the Nix way promises a paradise of reproducibility and simplicity. But is it just a painful trek through configuration hell? We built the dream Nextcloud using Nix and faced reality. Special Guest: Alex Kretzschmar.
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