Hackaday Podcast 124: Hard Drivin’ With Graphene, Fooled By Lasers, Etching With Poison Acid, And All The Linux Commands

Hackaday editors Elliot Williams and Mike Szczys marvel at the dangerous projects on display this week, including glass etching with hydrofluoric acid and pumping 200,000 A into a 5,000 A fuse. A new board that turns the Raspberry Pi into an SDR shows off the power of the secondary memory interface (SMI) present in those Broadcom chips. We also discuss the potential for graphene in hard drives, and finish up with a teardown of a very early electronic metronome.

You know you want to read the show notes!

Take a look at the links below if you want to follow along, and as always, tell us what you think about this episode in the comments!

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This Week In Security: Schemeflood, Modern Wardialing, And More!

There’s been yet another technique discovered to fingerprint users, and this one can even work in the Tor browser. Scheme flooding works by making calls to application URLs, something like steam://browsemedia. If your machine supports the requested custom URL, a pop-up is displayed, asking permission to launch the external application. That pop-up can be detected by JavaScript in the browser. Detect enough apps, and you can build a reasonable fingerprint of the system the test is run on. Unlike some previous fingerprinting techniques, this one isn’t browser dependent — it will theoretically give the same results for any browser. This means even the Tor browser, or any browser being used over the Tor network, can give your potentially unique set of installed programs away.

Now for the good news. The Chrome devs are already working on this issue, and in fact, Chrome on my Linux desktop didn’t respond to the probes in a useful way. Feel free to check out the demo, and see if the results are accurate. And as for Tor, you really should be running that on a dedicated system or in a VM if you really need to stay anonymous. And disable JavaScript if you don’t want the Internet to run code on your computer.
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ISS Gets Roll-Out Solar Panels In Post-Shuttle Fix

Astronauts are currently installing the first of six new solar arrays on the International Space Station (ISS), in a bid to bolster the reduced power generation capability of the original panels which have now been in space for over twenty years. But without the Space Shuttle to haul them into orbit, developing direct replacements for the Stations iconic 34 meter (112 foot) solar “wings” simply wasn’t an option. So NASA has turned to next-generation solar arrays that roll out like a tape measure and are light and compact enough for the SpaceX Dragon to carry them into orbit.

Space Shuttle Atlantis carrying part of the ISS truss.

Considering how integral the Space Shuttle was to its assembly, it’s hardly a surprise that no major modules have been added to the ISS since the fleet of winged spacecraft was retired in 2011. The few small elements that have been installed, such as the new International Docking Adapters and the Nanoracks “Bishop” airlock, have had to fit into the rear unpressurized compartment of the Dragon capsule. While a considerable limitation, NASA had planned for this eventuality, with principle construction of the ISS always intended to conclude upon the retirement of the Shuttle.

But the International Space Station was never supposed to last as long as it has, and some components are starting to show their age. The original solar panels are now more than five years beyond their fifteen year service life, and while they’re still producing sufficient power to keep the Station running in its current configuration, their operational efficiency has dropped considerably with age. So in January NASA announced an ambitious timeline for performing upgrades the space agency believes are necessary to keep up with the ever-increasing energy demands of the orbiting laboratory.

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Teardown: Franz Crystal Metronome

I wish I could tell you that there’s some complex decision tree at play when I select a piece of hardware to take apart for this series, but ultimately it boils down two just two factors: either the gadget was something I was personally interested in, or it was cheap. An ideal candidate would check both boxes, but that’s not always the case. This time around however, I can confidently say our subject doesn’t fall into either category.

Now don’t get me wrong, at first glance I found the Franz Crystal Metronome to be intriguing in its own way. With that vintage look, how could you not? But I’m about as far from a musician as one can get, so you’d hardly find a metronome on my wish list. As for the cost, a check on eBay seems to show there’s something of a following for these old school Franz models, with ones in good condition going for $50 to $80. Admittedly not breaking the bank, but still more than I’d like to pay for something that usually ends up as a pile of parts.

That being the case, why are you currently reading about it on Hackaday? Because it exploits something of a loophole in the selection process: it doesn’t work, and somebody gave it to me to try and figure out why. So without further ado let’s find out what literally makes a Franz Crystal Metronome tick, and see if we can’t get it doing so gain.

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Illustrated Kristina with an IBM Model M keyboard floating between her hands.

Keebin’ With Kristina: The One With The Chinese Typewriter

As much as I’d like to devote an article to each and every bit of keyboard-related what-have-you that I come across in my travels through the intertubes, there just aren’t enough hours. And after all, this isn’t Clack-a-Day. To that end, I gained editorial approval to bring you a periodic round-up of news and other tidbits on the keyboard and keyboard accessories front, and here we are. So let’s get to it!

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Microscopy Hack Chat With Zachary Tong

Join us on Wednesday, June 23 at noon Pacific for the Microscopy Hack Chat with Zachary Tong!

There was a time when electronics was very much a hobby that existed in the macroscopic world. Vacuum tubes, wire-wound resistors, and big capacitors were all mounted on terminal strips and mounted in a heavy chassis or enclosure, and interfacing with everything from components to tools was more an exercise in gross motor skills than fine. Even as we started to shrink components down to silicon chips, the packages we put them in were still large enough to handle and see easily. It’s only comparatively recently that everything has started to push the ludicrous end of the scale, with components and processes suitable only for microscopic manipulation, but that’s pretty much where we are now, and things are only likely to get smaller as time goes on.

The microscopic world is a fascinating one, and the tools and techniques to explore it are often complex. That doesn’t mean microscopy is out of the wheelhouse of the average hacker, though. Zachary Tong, proprietor of the delightfully eclectic Breaking Taps channel on YouTube, has been working in the microscopic realm a lot lately. We’ve featured his laser scanning confocal microscope recently, as well as his latest foray into atomic force microscopy. In the past he has also made DIY acrylic lenses, and he has even tried his hand at micromachining glass with lasers.

Zach is pretty comfortable working in and around the microscopic realm, and he’ll stop by the Hack Chat to share what he’s been up to down there. We’ll talk about all the cool stuff going on in Zach’s lab, and see what else he has in store for us.

join-hack-chatOur Hack Chats are live community events in the Hackaday.io Hack Chat group messaging. This week we’ll be sitting down on Wednesday, June 23 at 12:00 PM Pacific time. If time zones have you tied up, we have a handy time zone converter.
Click that speech bubble to the right, and you’ll be taken directly to the Hack Chat group on Hackaday.io. You don’t have to wait until Wednesday; join whenever you want and you can see what the community is talking about.

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Hackaday Links: June 20, 2021

The hits just keep coming for Elon Musk, as this week Starlink users reported their new satellite dishes apparently can’t take the heat. Granted, the places these reports are coming from are really, really hot, like Topock, Arizona, where one Starlink beta tester is located and where the air temperature is expected to hit 123°F (50°C) on Saturday. One user contacted Starlink customer service and was told that Dishy McFlatface is programmed to shut down if the surface temperature exceeds 50°C, which even in non-Arizona locations would be easily exceeded on a rooftop or in an urban heat island. Users experiencing thermal shutdown are taking extreme measures to get back online in the heat of the day, like by setting up sprinklers to water-cool their dishes. Others are building solar shades, and one die-hard is even considering putting the dish on an antenna tower, to get it up into the relatively cooler air above the ground. But these are just workarounds, and according to the engineer who did the Starlink teardown we featured a while back, the permanent fix may just be to redesign the thermal management. In other words, this isn’t likely to be another one of those problems that gets fixed with an OTA software push. Which is probably to be expected for something that’s still in the “Better than Nothing Beta” release.

We’ve all heard that AI and robots are going to replace pretty much every job at some point, but if one customer’s experience with an AI drive-through window is any gauge, it might take quite a while to get there. In a video posted on TikTok (we know, we know), a customer at a Chicago-area McDonald’s showed that the fast-food giant put exactly zero effort into making the experience anything but engaging. The synthesized voice is creepy, and evokes all the wrong kinds of feelings, like the ones you get when you’re forced to use a voice-response system to get through “voice mail jail”. At least in those cases, the voice at least sounds semi-apologetic when it can’t understand what you’ve said. After listening to it once, we’d much rather have a real human, even if it is a surly teen. This seems like a missed opportunity by McDonald’s, which probably has the resources to put a little humanity into their AI.

A while back, we dropped a link about satellites made largely of wood. At the time it seemed interesting if a bit self-serving, since the effort was largely backed by a large Finnish plywood company. And while that aspect of the project hasn’t changed, we’ve now got a better idea of how the WISA Woodsat is put together, and what it will do once it flies later this year. To be clear, the 1U CubeSat is not 100% wood, which of course would make including any electronics problematic. Instead, the side and top panels of the satellite are made from plywood, which are attached to aluminum rails that integrate with the launcher on the mothership. There’s also a metal pantograph-style selfie-stick, because pics or it didn’t happen. The interesting bit is the pre-treatment of the birch plywood, which is dried in a thermal vacuum chamber to prevent outgassing in space. Additionally, the exterior surface of the wood panels was covered with a thin layer of aluminum oxide, to give the surface a chance against highly reactive atomic oxygen. There will be sensors inside the satellite to see if any outgassing occurs, so we could actually get some valuable data about using wood in satellites out of what otherwise could have been just a publicity stunt.

As our long global nightmare appears to be playing out its endgame, and as the world begins to reopen itself to normal pursuits, it’s nice to see that some cons and meetups are actually returning to meatspace. One such event will be BornHack 2021, that week-long campout in a Danish forest with hundreds of like-minded hackers, tinkerers, and artists. The Call for Participation deadline has been extended to July 1, which gives you just a little more time to consider giving a presentation. We’ve heard Jenny List speak glowingly of BornHack, and it actually looks like a lot of fun.

And finally, it’s said that one can never include too many comments when writing code. Not everyone feels that way, of course; I once had a co-worker complain that I commented my code too much, which of course meant that I redoubled my efforts to make sure I had as many comments as possible. That meant I often ran out of ideas for pithy, pertinent, and gratuitous comments to sprinkle into my code. It’s a shame What The Commit didn’t exist back then. Just click the link and you’ll get a fresh, auto-generated comment ready to copy into your commits or embed in your code. Have fun!