Dual RGB Cameras Get Depth Sensing Powerup

June 19, 2025 by 17 Comments

It’s sometimes useful for a system to not just have a flat 2D camera view of things, but to have an understanding of the depth of a scene. Dual RGB cameras can be used to sense depth by contrasting the two slightly different views, in much the same way that our own eyes work. It’s considered an economical but limited method of depth sensing, or at least it was before FoundationStereo came along and blew previous results out of the water. That link has a load of interactive comparisons to play with and see for yourself, so check it out.

A box of disordered tools at close range is understood very well, and these results are typical for the system.

The FoundationStereo paper explains how researchers leveraged machine learning to create a system that can not only outperform existing dual RGB camera setups, but even active depth-sensing cameras such as the Intel RealSense.

FoundationStereo is specifically designed for strong zero-shot performance, meaning it delivers useful general results with no additional training needed to handle any particular scene or environment. The framework and models are available from the project’s GitHub repository.

While products like Microsoft’s Kinect have struggled to keep the consumer’s attention, depth sensing remains an enabling technology that opens possibilities and gives rise to interesting projects, like a headset that allows one to see the world through the eyes of a depth sensor.

The ability to easily and quickly gain an understanding of the physical layout of a space is a powerful tool, and if a system like this one can deliver such fantastic results with nothing more than two RGB cameras, that’s a great sign. Watch it in action in the video below.

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Hacker Tactic: ESD Diodes

June 19, 2025 by 24 Comments

A hacker’s view on ESD protection can tell you a lot about them. I’ve seen a good few categories of hackers neglecting ESD protection – there’s the yet-inexperienced ones, ones with a devil-may-care attitude, or simply those of us lucky to live in a reasonably humid climate. But until we’re able to control the global weather, your best bet is to befriend some ESD diodes before you get stuck having to replace a microcontroller board firmly soldered into your PCB with help of 40 through-hole pin headers.

Humans are pretty good at generating electric shocks, and oftentimes, you’ll shock your hardware without even feeling the shock yourself. Your GPIOs will feel it, though, and it can propagate beyond just the input/output pins inside your chip. ESD events can be a cause of “weird malfunctions”, sudden hardware latchups, chips dying out of nowhere mid-work – nothing to wish for.

Worry not, though. Want to build hardware that survives? Take a look at ESD diodes, where and how to add them, where to avoid them, and the parameters you want to keep in mind. Oh and, I’ll also talk about all the fancy ways you can mis-use ESD diodes, for good and bad alike!

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Game Boy? NES? Why Not Both!

June 19, 2025 by 4 Comments

If you’re a retro Nintendo fan you can of course carry a NES and a Game Boy around with you, but the former isn’t very portable. Never fear though, because here’s [Chad Burrow], who’s created a neat handheld console that emulates both.

It’s called the Acolyte Handheld, and it sports the slightly unusual choice for these parts of a PIC32 as its main processor. Unexpectedly it can use Sega Genesis controllers, but it has the usual buttons on board for portable use. It can drive either its own LCD or an external VGA monitor, and in a particularly nice touch, it switches between the two seamlessly. The NES emulator is his own work, while Game Boy support comes courtesy of Peanut-GB.

We like the design of the case, and particularly that of the buttons. Could it have been made smaller by forgoing some of the through-hole parts in favour of SMD ones? Quite likely, but though it’s chunky it’s certainly not outsized.

Portable Nintendo-inspired hardware is popular around here, as you can see with this previous handheld NES

Space-Based Datacenters Take The Cloud Into Orbit

June 19, 2025 by 41 Comments

Where’s the best place for a datacenter? It’s an increasing problem as the AI buildup continues seemingly without pause. It’s not just a problem of NIMBYism; earthly power grids are having trouble coping, to say nothing of the demand for cooling water. Regulators and environmental groups alike are raising alarms about the impact that powering and cooling these massive AI datacenters will have on our planet.

While Sam Altman fantasizes about fusion power, one obvious response to those who say “think about the planet!” is to ask, “Well, what if we don’t put them on the planet?” Just as Gerard O’Neill asked over 50 years ago when our technology was merely industrial, the question remains:

“Is the surface of a planet really the right place for expanding technological civilization?”

O’Neill’s answer was a resounding “No.” The answer has not changed, even though our technology has. Generative AI is the latest and greatest technology on offer, but it turns out it may be the first one to make the productive jump to Earth Orbit. Indeed, it already has, but more on that later, because you’re probably scoffing at such a pie-in-the-sky idea.

There are three things needed for a datacenter: power, cooling, and connectivity. The people at companies like Starcloud, Inc, formally Lumen Orbit, make a good, solid case that all of these can be more easily met in orbit– one that includes hard numbers.

Sure, there’s also more radiation on orbit than here on earth, but our electronics turn out to be a lot more resilient than was once thought, as all the cell-phone cubesats have proven. Starcloud budgets only 1 kg of sheilding per kW of compute power in their whitepaper, as an example. If we can provide power, cooling, and connectivity, the radiation environment won’t be a showstopper.

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Flopped Humane “AI Pin” Gets An Experimental SDK

June 19, 2025 by 11 Comments

The Humane AI Pin was ambitious, expensive, and failed to captivate people between its launch and shutdown shortly after. While the units do contain some interesting elements like the embedded projector, it’s all locked down tight, and the cloud services that tie it all together no longer exist. The devices technically still work, they just can’t do much of anything.

The Humane AI Pin had some bold ideas, like an embedded projector. (Image credit: Humane)

Since then, developers like [Adam Gastineau] have been hard at work turning the device into an experimental development platform: PenumbraOS, which provides a means to allow “untrusted” applications to perform privileged operations.

As announced earlier this month on social media, the experimental SDK lets developers treat the pin as a mostly normal Android device, with the addition of a modular, user-facing assistant app called MABL. [Adam] stresses that this is all highly experimental and has a way to go before it is useful in a user-facing sort of way, but there is absolutely a workable architecture.

When the Humane AI Pin launched, it aimed to compete with smartphones but failed to impress much of anyone. As a result, things folded in record time. Humane’s founders took jobs at HP and buyers were left with expensive paperweights due to the highly restrictive design.

Thankfully, a load of reverse engineering has laid the path to getting some new life out of these ambitious devices. The project could sure use help from anyone willing to pitch in, so if that’s up your alley be sure to join the project; you’ll be in good company.

Iron Nitride Permanent Magnets Made With DIY Ball Mill

June 19, 2025 by 10 Comments

Creating strong permanent magnets without using so-called rare earth elements is an ongoing topic of research. An interesting contestant here are iron nitride magnets (α”-Fe16N2), which have the potential to create permanents magnets on-par with with neodymium (Nd2Fe14B) magnets. The challenging aspect with Fe-N magnets is their manufacturing, with recently [Ben Krasnow] giving it a shot over at the [Applied Science] YouTube channel following the method in a 2016 scientific paper by [Yanfeng Jiang] et al. in Advanced Engineering Materials.

This approach uses a ball mill (like [Ben]’s planetary version) with ammonium nitrate (NH4NO3) as the nitrogen source along with iron. After many hours of milling a significant part of the material is expected to have taken on the α”-Fe16N2 phase, after which shock compaction is applied to create a bulk magnet. After the ball mill grinding, [Ben] used a kiln at 200°C for a day to fix the desired phase. Instead of shock compaction, casting in epoxy was used as alternative.

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Gas Burner Reuses Printer Nozzle For Metalwork

June 18, 2025 by 8 Comments

Even if you don’t cast or forge metal yourself, you’re probably aware that you need to get the material very, very hot to make that happen. While some smiths might still stoke coal fires, that’s a minority taste these days; most, like [mikeandmertle] use gas burners to generate the heat. Tired of expensive burners or finicky DIY options [mikeandmertle] built their own Better Burner out of easily-available parts. 

Everything you need to make this burner comes from the hardware store: threaded iron pipes of various sizes, hoses and adapters– except for one key piece: a 3D printer nozzle. The nozzle is used here as the all-important gas jet that introduces flammable gas into the burner’s mixing chamber. A demo video below shows it running with a 0.3mm nozzle, which looks like it is putting out some serious heat, but [mikeandmertle] found that could go out if the breather was opened too wide (allowing too much air in the mixture). Eventually he settled on a 0.4mm nozzle, at least for the LPG that is common down under. If one was to try this with propane, their mileage would differ.

That’s the great thing about using printer nozzles, though: with a tapped M6 hole on the cap of the gas pipe serving as intake, one can quickly and easily swap jets without worrying about re-boring. Printer nozzles are machined to reasonable accuracy and you can get a variety pack with all available sizes (including ones so small you’re probably better off using resin) very cheaply.

These sorts of use-what-you-have-on-hand hacks seem to be [mikeandmertle]’s specialty– we’ve seen their PVC thumb nut and their very simple mostly-wooden wood lathe here before. 

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