Hackaday links: September 25, 2022


There seems to be a problem with L2, where The James Webb Space Telescope has a mechanical anomaly Back in August. The case, which was just announced this week, concerns only one of the six imaging instruments at the heart of the space observatory, known as MIRI, the medium-infrared instrument. MIRI is the tool on Webb that needs cooler temperatures to work properly, down to six Kelvin – we’ve talked aboutHe needed coolant to do that in some detail. The problem is unexpectedly high friction while turning a wheel bearing different yaw barriers. These grids are rotated in the optical path for various measurements, but it appears that the motor began to draw excessive current while in motion, and is turned off. NASA says this only affects one of four MIRI monitoring modes, and the rest of the instruments are fine at this time. So they have some troubleshooting before Webb returns to a full program of science notes.

There’s an old saying that “it’s human to be wrong, but to really screw things up it takes a computer.” But in Russia, to really screw things up, it takes a computer and a human with a really poor understanding of how finely the balance of most infrastructure systems is. The story comes from Moscow, where someone claims Spoofed a huge number of fake taxi rides (The story is in Russian, Google Translate works fine) Through the Yandex.Taxi aggregator on the morning of September 1. Grinding and getting rid of traffic. Yandex reports that it has already added protection against such attacks to its algorithm, so at least there is that. It’s all fun and games until someone causes a traffic jam.

It might be hard for a layperson to imagine a coffee table book of electronic components, but if you follow here a lot, you’ll no doubt see some beautiful cross-sections that Eric Schleifer, aka TubeTime, has come up with. Eric’s collaboration with Windell Oskay from Evil mad scientist laboratories blog and set up “Open Circuits: The Inner Beauty of Electronic Components.” You will definitely want to check out chapter oneAvailable as a PDF file for download. Bonnie also did a glowing review, Which you’ll want to at least check for a coupon code—Christmas is coming, after all. Windell and Eric talked about the book at Embedded.fm podcast Also, if you’d rather hear them talk about the book.

We’ve probably all heard horror stories about 3D printers catching fire in the middle of the night, and while the relative risk is probably minimal – it’s certainly not zero. So a bit of wisdom is likely to be noted, which has some practical limitations for most of us. It’s not easy to organize your day around a print session session, especially one that takes 24 hours or more. Utilities like OctoPrint can help, but at the end of the day, if you’re minutes away when seconds count, all the camera does is document the destruction. But Here’s an idea that might do something about a fire. It uses a product we’ve never seen before, an automatic fire extinguisher for car interior decoration. They seem to self-activate over a preset temperature, releasing some kind of dry chemical to put out the fire. We have our doubts about how well this would work in a car, but inside a 3D printer enclosure, it might actually work. If anyone has experience with these things, speak up in the comments.

Finally, if you’ve always felt like you’re behind the curve of understanding quantum mechanics, you might be in the market for our friend. Yerwin Flighar’s latest video about quantum fields. He’s pretty clever – he’s using his latest bathroom remodeling project as a jumping off point for a discussion, which we honestly only got halfway through before zoning. This is a constant problem for us when we dip a toe into the sleeve trough, and frankly getting this far is better than average. So hats off to Jeroen for trying to explain things and to upgrade the beautiful bathroom. Oh, and on a related note, Sabine Hossenfelder dropped a video on a file “Nine Levels of Nothing”, Which you may want to check out once your mind is in the right quantitative state.


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