Hackaday Links: February 6, 2022

February 6, 2022 by Dan Maloney 41 Comments

Last week, the news was filled with stories of Jack Sweeney and his Twitter-bot that tracks the comings and goings of various billionaires in their private jets. This caught the attention of the billionaire-iest of them all, one Elon Musk, who took exception to the 19-year-old’s feat of data integration, which draws from a number of public databases to infer the location of Elon’s plane. After Jack wisely laughed off Elon’s measly offer of $5,000 to take the bot down, Elon ghosted him — pretty childish behavior for the richest man on the planet, we have to say. But Jack might just have the last laugh, as an Orlando-based private jet chartering company has now offered him a job. Seems like his Twitter-bot and the resulting kerfuffle is a real resume builder, so job-seekers should take note.

Here’s hoping that you have a better retirement plan than NASA. The space agency announced its end-of-life plans for the International Space Station this week, the details of which will just be a run-up to the 2031 de-orbit and crash landing of any remaining debris into the lonely waters of Point Nemo. The agency apparently sees the increasingly political handwriting on the ISS’s aging and sometimes perforated walls, and acknowledges that the next phase of LEO space research will be carried out by a fleet of commercial space stations, none of which is close to existing yet. Politics aside, we’d love to dig into the technical details of the plan, and see exactly what will be salvaged from the station before its fiery demise, if anything. The exact method of de-orbiting too would be interesting — seems like the station would need quite a bit of thrust to put on the brakes, and might need the help of a sacrificial spacecraft.

“You break it, you fix it,” is a philosophy that we Hackaday types are probably more comfortable with than the general public, who tend to leave repairs of broken gear to professionals. But that philosophy seems to be at the core of Google’s new Chromebook repair program for schools, which encourages students to fix the Chromebooks they’re breaking in record numbers these days. Google is providing guidance for schools on setting up complete Chromebook repair facilities, including physical layout of the shop, organization of workflows, and complete repair information for at least a couple of popular brands of the stripped-down laptops. Although the repairs are limited to module-level stuff, like swapping power supplies, we still love the sound of this. Here’s hoping that something like this can trigger an interest in electronics for students that would otherwise never think to open up something as complicated as a laptop.

Back in July, we took note of a disturbing report of an RTL-SDR enthusiast in Crimea who was arrested for treason, apparently based on his interest in tracking flights and otherwise monitoring the radio spectrum. Now, as things appear to be heating up in Ukraine again, our friends at RTL-SDR.com are renewing their warning to radio enthusiasts in the area that there may still be risks. Then as now, we have little interest in the politics of all this, but in light of the previous arrest, we’d say it pays to be careful with how some hobbies are perceived.

And finally, aside from the aforementioned flight-tracking dustup, it’s been a tough week for Elon and Tesla. Not only have 817,000 of the expensive electric vehicles been recalled over something as simple as a wonky seatbelt chime, but another 54,000 cars are also being recalled for a software bug that causes them to ignore stop signs in “Full Self-Driving” mode. We’re not sure if this video of this Tesla hell-ride has anything to do with that bug, but it sure illustrates the point that FSD isn’t really ready for prime time. Then again, as a former Boston resident, we can pretty safely say that what that Tesla was doing isn’t really that much different than the meat-based drivers there.

Hackaday Links: January 30, 2022

January 30, 2022 by Dan Maloney 12 Comments

After all the fuss and bother along the way, it seems a bit anticlimactic now that the James Webb Space Telescope has arrived at its forever home orbiting around L2. The observatory finished its trip on schedule, arriving on January 24 in its fully deployed state, after a one-month journey and a couple of hundred single-point failure deployments. The next phase of the mission is commissioning, and is a somewhat more sedate and far less perilous process of tweaking and trimming the optical systems, and getting the telescope and its sensors down to operating temperature. The commissioning phase will take five or six months, so don’t count on any new desktop photos until summer at the earliest. Until then, enjoy the video below which answers some of the questions we had about what Webb can actually see — here’s hoping there’s not much interesting to see approximately in the plane of the ecliptic.

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Hackaday Links: January 23, 2022

January 23, 2022 by Dan Maloney 14 Comments

When Tonga’s Hunga-Tonga Hunga-Ha’apai volcano erupted on January 15, one hacker in the UK knew just what to do. Sandy Macdonald from York quickly cobbled together a Raspberry Pi and a pressure/humidity sensor board and added a little code to create a recording barometer. The idea was to see if the shock wave from the eruption would be detectable over 16,000 km away — and surprise, surprise, it was! It took more than 14 hours to reach Sandy’s impromptu recording station, but the data clearly show a rapid pulse of increasing pressure as the shockwave approached, and a decreased pressure as it passed. What’s more, the shock wave that traveled the “other way” around the planet was detectable too, about seven hours after the first event. In fact, data gathered through the 19th clearly show three full passes of the shockwaves. We just find this fascinating, and applaud Sandy for the presence of mind to throw this together when news of the eruption came out.

Good news for professional astronomers and others with eyes turned skyward — it seems like the ever-expanding Starlink satellite constellation isn’t going to kill ground-based observation. At least that’s the conclusion of a team using the Zwicky Transient Facility (ZTF) at the Palomar Observatory outside San Diego. ZTF is designed to catalog anything that blinks, flashes, or explodes in the night sky, making it perfect to detect the streaks from the 1,800-odd Starlink satellites currently in orbit. They analyzed the number of satellite transients captured in ZTF images, and found that fully 20 percent of images show streaks now, as opposed to 0.5 percent back in 2019 when the constellation was much smaller. They conclude that at the 10,000 satellite full build-out, essentially every ZTF image will have a streak in it, but since the artifacts are tiny and well-characterized, they really won’t hinder the science to any appreciable degree.

Speaking of space, we finally have a bit of insight into the causes of space anemia. The 10% to 12% decrease in red blood cells in astronauts during their first ten days in space has been well known since the dawn of the Space Age, but the causes had never really been clear. It was assumed that the anemia was a result of the shifting of fluids in microgravity, but nobody really knew for sure until doing a six-month study on fourteen ISS astronauts. They used exhaled carbon monoxide as a proxy for the destruction of red blood cells (RBCs) — one molecule of CO is liberated for each hemoglobin molecule that’s destroyed — and found that the destruction of RBCs is a primary effect of being in space. Luckily, there appears to be a limit to how many RBCs are lost in space, so the astronauts didn’t suffer from complications of severe anemia while in space. Once they came back to gravity, the anemia reversed, albeit slowly and with up to a year of measurable changes to their blood.

From the “Better Late Than Never” department, we see that this week that Wired finally featured Hackaday Superfriend Sam Zeloof and his homemade integrated circuits. We’re glad to see Sam get coverage — the story was also picked up by Ars Technica — but it’s clear that nobody at either outfit reads Hackaday, since we’ve been featuring Sam since we first heard about his garage fab in 2017. That was back when Sam was still “just” making transistors; since then, we’ve featured some of his lab upgrades, watched him delve into electron beam lithography, and broke the story on his first legit integrated circuit. Along the way, we managed to coax him out to Supercon in 2019 where he gave both a talk and an interview.

And finally, if you’re in the mood for a contest, why not check out WIZNet’s Ethernet HAT contest? The idea is to explore what a Raspberry Pi Pico with Ethernet attached is good for. WIZNet has two flavors of board: one is an Ethernet HAT for the Pico, while the other is as RP2040 with built-in Ethernet. The good news is, if you submit an idea, they’ll send you a board for free. We love it when someone from the Hackaday community wins a contest, so if you enter, be sure to let us know. And hurry — submissions close January 31.

Hackaday Links: January 16, 2022

January 16, 2022 by Dan Maloney 21 Comments

As winter well and truly grips the northern hemisphere, it’s time once again to dunk on Tesla for leaving some owners out in the cold — literally. It seems that some Model 3 and Model Y owners are finding their ride’s heat pump isn’t exactly up to the task of, you know, pumping heat. That this seems to be happening mostly in the northeastern US and southern Canada, where a polar vortex is once again dominating the weather and driving temperatures down into the -30 °C (-22 °F) range, perhaps speaks more to the laws of thermodynamics than it does to the engineering of the Tesla climate control system. After all, if there’s not much heat outside the car, it’s hard to pump it inside. But then again, these are expensive machines, some of which have had extensive repairs to address this exact same issue when it cropped up last year. It seems to us that owners have a legitimate gripe with Tesla about this, and they may be getting some help from the Feds, who are taking an interest in the situation from a safety standpoint. After all, no heat likely means fogged up windows, and that’s hardly conducive to a safe trip. But hey, that’s what self-driving is for, right?

Much has been made of the dearth of engineering cameras on the James Webb Space Telescope, and the fact that we’ve been relying on animations to illustrate the dozens of deployments needed to unfurl the observatory and make it ready for its mission. Putting aside the fact that adding extra cameras to the spacecraft makes little sense since the interesting stuff was all happening on the side where the sun doesn’t shine, we did get treated to what was billed as “humanity’s last look at Webb” thanks to an engineering camera on the Ariane 5 rocket. But not so fast — an astrophotographer named Ethan Gone managed to spot the JWST as it transited to L2 the day after launch. Granted, the blip of light isn’t as spectacular as the Ariane shots, and it took a heck of a lot of astrophotography gear to do it, but it’s still thrilling to watch Webb moving gracefully through Orion.

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Hackaday Links: January 9, 2022

January 9, 2022 by Dan Maloney 10 Comments

It looks like we have a new space observatory! According to NASA, all the major deployments on the James Webb Space Telescope have been completed successfully. This includes the tricky sunshield deployment and tensioning, which went off this week without much in the way of trouble. The final major deployment, the unfolding of the starboard wing of the primary mirror of the telescope, was completed on Saturday while the spacecraft was still almost 400,000 km from its forever home orbiting Lagrange point L2. Mission controllers had allotted two weeks for the 300-odd deployments needed to turn the packaged machine into a working observatory. The remaining two weeks or so of flight include less dramatic tasks, such as trimming the shape of the primary mirror with servos that subtly alter the position and curvature of each of the 18 segments, plus a bunch of calibration tasks. But it looks like most of the really scary stuff is behind us now.

From the “Interesting Innards” department, if you’re a fan of either gaming or industrial CT scans, check out Scan of the Month’s look inside Nintendo handheld game consoles. They’ve put a bunch of games through computed tomography scans, and the results are really interesting, false-colored though they may be. Seeing the progression of technology from the original 1989 Game Boy to the Switch is fascinating. The side notes on the history and tech inside each one are pretty cool too.

A couple of weeks ago we mentioned Andrew Sink’s online low-poly generator, which takes any 3D model and allows you to control the number of polygons used to render it. He dropped us a line to let us know the tool proved popular enough that he had to move it off GitHub and onto a dedicated site. Check it out at its new home.

When something like this pops up in your feed, it seems like the best approach is to share it. It’s called DentalSlim, and claims to be the first intra-oral device designed for weight loss. It’s a hardware lock for your teeth, and it looks perfectly horrifying. The device is designed to be applied by a ~~sadist~~ dentist and effectively locks the lower jaw to the upper with magnets, allowing the wearer to open his or her mouth only enough to take a liquid diet. There’s also a provision for the wearer to unlock the device in an emergency, which is wise — can you imagine catching a stomach bug with your jaw locked shut? — but that seems to defeat the “hardware-enforced willpower” that the device is based on.

Have you got a bunch of filament spools lying around from all that 3D printing? Rather than put them to use rolling up strings of lights from the Christmas tree, here’s another idea: turn them into nice covered bird feeders. All you need to do is apply a rim around one side to hold the seed before hanging them out for the birds. We suppose walling off the space between the sides completely and drilling some holes could also turn them into birdhouses, too.

And finally, if your filament spool bird feeder isn’t attracting the attention of the neighborhood cats, perhaps it’s because they’ve found a nice, cozy spot to soak up some heat. At least that’s what some Starlink users are seeing as their feline friends cuddle up on Dishy McFlatface for a long winter’s nap. You see, the phased array antenna inside the enclosure gets pretty toasty, and cats are pretty much any-port-in-a-storm critters, so it’s only natural. We can’t imagine their choice of basking locale does much for data throughput, and it’s probably quite a laugh when the dish pivots to track a satellite. But it’s hard to feel sorry for something that sleeps 23-½ hours a day.

Hackaday Links: January 2, 2022

January 2, 2022 by Dan Maloney 10 Comments

That sound you may have heard in the wee hours of Christmas morning had nothing to do with Santa; rather, it was the sound of a million astronomers collectively letting out their breath around the world as the James Webb Space Telescope survived its fiery ride to space. And not only did it survive, but the ESA launch team did such a good job putting the Ariane rocket on course that NASA predicts the observatory now has enough fuel to more than double its planned ten-year mission. Everything about the deployment process seems to be going well, too, with all the operations — including the critical unfurling of the massive and delicate sunshield — coming off without a hitch. Next up: tensioning of the multiple layers of the sunshield. If you want to play along at home, NASA has a nice site set up to track where JWST is and what its current status is, including temperatures at various points on the telescope.

We got a tip from Mark about some dodgy jumper wires that we thought we should share. Low-quality jumpers aren’t really a new problem, but they can really put a damper on the fun of prototyping. The ones that Mark found could be downright dangerous. He got them with a recent dev board purchase; outwardly, they appear fine, at least at first. Upon closer inspection, though, the conductors have turned to powder inside the insulation. Even the insulation is awful, since it discolors when even slightly flexed. He suspects conductors are actually copper-plated aluminum; check out his pictures below and maybe look through your collection for similarly afflicted jumpers.

Speaking of dodgy hardware, if you love the smell of melting MOSFETs in the morning, then have we got a deal for you. It seems that a non-zero number of Asus Z690 Hero PC motherboards have suffered a fiery demise lately, stirring complaints and discontent. This led some curious types to look for the root cause, which led to the theory that an electrolytic cap had been installed with the wrong polarity on the dead boards. Asus confirmed the diagnosis, and is doing the right thing as they are “working with the relevant government agencies on a replacement program.” So if you’ve got one of these motherboards, you might want to watch the video below and see how the caps were installed.

If you’re in the mood for some engineering eye-candy, check out the latest video from Asianometry. They’ve got a finger on the pulse of the semiconductor industry, with particular attention paid to the engineering involved in making the chips we all have come to depend on. The video below goes into detail on the extreme ultraviolet (EUV) light source that fabrication machine maker ASML is developing for the next generation of chip making. The goal is to produce light with a mind-bending wavelength of only 13.5 nanometers. We won’t spoil the details, but suffice it to say that hitting microscopic droplets of tin with not one but two lasers is a bit of a challenge.

And finally, bad luck for 38 people in Tokyo who were part of a data breach by the city’s Metropolitan Police Department. Or rather, good luck since the data breach was caused by the loss of two floppy disks containing their information. The police say that there haven’t been any reports of misuse of the data yet, which is really not surprising since PCs with floppy drives are a little thin on the ground these days. You’d think that this would mean the floppies were left over from the 90s or early 2000s, but no — the police say they received the disks in December of 2019 and February of 2021. We’d love to know why they’re still using floppies for something like this, although it probably boils down to yet another case of “if it ain’t broke, don’t fix it.”

Hackaday Links: December 26, 2021

December 26, 2021 by Dan Maloney 11 Comments

At the time of this writing, the James Webb Space Telescope was perched upon its ride to space, ready for its much-delayed launch from the ESA spaceport in French Guiana. The $10 billion space observatory suffered one final delay (knocks on wood) when predictions of high winds aloft pushed it back from a Christmas Eve launch to a Christmas Day departure, at 12:20 UTC. Given the exigencies of the day, we doubt we’ll be able to watch the launch live — then again, past experience indicates we’ll still be wrapping presents at 4:20 PST. Either way, here’s hoping that everything comes off without a hitch, and that astronomers get the present they’ve been waiting many, many Christmases for.

In other space news, things are getting really interesting on Mars. The ESA announced that their ExoMars Trace Gas Orbiter has detected signs of water in the Valles Marineris. The satellite found a large area of increased hydrogen concentration in the top meter of Martian soil; the assumption is that the hydrogen comes from water, meaning that as much as 40% of the material in the region scanned may be water. If so, that’s a huge find, as we thought most of Mars’ water was locked in the polar regions. The Mariner Valley stretches more than 4,000 km just below the equator, and so may prove to be an important resource for future explorers.

Meanwhile, in Jezero crater, Perseverance has decided to upstage its rotorcraft sidekick for a change by finding signs of organic molecules on Mars. It’s not the first time organic compounds have been found — Perseverance’s cousin Curiosity found some too, ESA’s Mars Express mission spotted methane from on high, and then there were the equivocal but intriguing results from the Viking missions in the 1970s. But the latest evidence is really great news for the scientists who picked Jezero crater as a likely place to search for signs of past life on Mars. The organics found are not proof of life by any means, as there are many ways to make organic molecules abiotically. But then again, if you’re going to find evidence of life on Mars, you’ve got to start with detecting organics.

Back on Earth, getting your laptop stolen would be bad enough. But what if it got yoinked while it was unlocked? Depending on who you are and what you do with that machine, it could be a death sentence. That’s where BusKill could come in handy. It’s a hardware-software approach to securing a laptop when it — or you — suddenly goes missing. A dongle with a breakaway magnetic lanyard gets plugged into a USB port, and the other end of the lanyard gets attached to your person. If you get separated from your machine, the dongle sends customizable commands to either lock the screen or, for the sufficiently paranoid, nuke the hard drive. The designs are all up on GitHub, so check it out and think about what else this could be useful for.

If you like the look of low-poly models but hate the work involved in making them, our friend and Hack Chat alumnus Andrew Sink came up with a solution: an online 3D low-poly generator. The tool is pretty neat; it uses three.js and runs completely in-browser. All you have to do is upload an STL file and set sliders to get rid of as many triangles as you want. Great stuff, and fun to play with even if you don’t need to decimate your polygons.

And finally, what have you done with your oscilloscope for the last three years? Most of us can’t answer that except in the vaguest of terms, but then there’s DrTune, who took three years’ worth of screencaps from this Rigol DS1054z and strung them together into a 60-second movie. He swears he didn’t purposely sync the video to the soundtrack, which is “Flight of the Bumblebee” by Rimsky-Korsakov, but in some places it’s just perfect. See if you can guess what DrTune has been working on by watching the waveforms fly by. And watch for Easter eggs.