Classically-named Argus Robot Is Terminator Meets Tumbleweed

June 1, 2026 by 3 Comments

If you were making a multi-limbed symmetric nightmare of a robot, where else would you look for a name but Greek Mythology? The team at Duke University that came up with this particular multi-limbed creature had two obvious choices: name it for one of the Hundred-Handed giants, the Hecatoncheires, or lean on the fact that each limb has its own sensor and go for many-eyed Argus. Argus sounds better to a funding committee, so Argus it is.

Hecatoncheries would be a bit of a reach anyway, considering Argus only has 20 limbs in its current incarnation. It uses what the researchers are calling its ‘dynamic symmetry’ to get around– extending and retracting its many limbs to exert forces in any direction, it can bounce about like a beach ball on a windy day.

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Making A Zippy FDM Printer Out Of Wood

May 31, 2026 by 6 Comments

Generally, the frame and other structural parts of an FDM printer use steel or similar, but could you use wood instead for that truly artisan look? As [Mitsu Makes] demonstrates after half a year of work, you absolutely can, and it looks about as amazing as you might imagine.

Naturally, you cannot make everything out of wood – such as the linear rails and lead screws – and there is a fair bit of FDM-printed black PLA in there too, but the wood is both structural and decorative. The stained look does really add something. For the FDM-specific parts, the Voron 0 was taken as the base, including the bed. The motion system isn’t CoreXY but Cartesian for ease of construction and driving the axes, while also providing more torque due to the additional motors.

Since it’s more or less a Voron FDM printer and even has automatic bed leveling, it works basically perfectly after assembly and input shaping. Even if it’s not the most practical way to make your own FDM printer from parts, it definitely makes it look unique and would be the focal point of any printing farm.

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Off-Grid OCR Server Powered By IPhone

May 31, 2026 by 3 Comments

Running an optical character recognition (OCR) server might sound like it would need some powerful hardware, like a rack-mounted, water-cooled machine, or at least a nice desktop or laptop. But if you have the time, anything could be used. [Hemant] has a long-running personal project that processes a lot of image data over a long time, and set up the OCR server on an iPhone 8 running entirely with solar power, rather than turn to more typical hardware.

Part of what makes this task feasible for low-powered hardware is Apple’s Vision framework, which uses machine learning to aid in things like character recognition (among other tasks). It will run on an iPhone just as easily as a Mac. The phone’s built-in battery already provides the first step of an off-grid setup. This build relies on a separate power bank to integrate the phone with the solar panel more easily. On the software side, [Hemant] reports that the true challenge wasn’t setting up the server as much as it was keeping the iPhone from sleeping or stopping his program from running full-time.

A system like this running off-grid, especially considering the costs of the solar panel and power bank, might seem counterproductive. But when comparing electricity costs for running the same software on his server, he estimates he saves about $10 per month with this setup, which has a payback of somewhere around 2-3 years. Not too bad for a phone that would have otherwise ended up in a landfill. Old phones can be surprisingly good choices for servers, too. It helps if they can run Linux, but plenty of phones will support server applications, even when running their native OS.

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Hackaday Links: May 31, 2026

May 31, 2026 by 6 Comments

If you’re located in the Northeast United States and thought you heard an explosion yesterday afternoon, it wasn’t just your imagination — multiple sources have now confirmed that a 1 meter (3 foot) meteor entered the Earth’s atmosphere and broke up in the air off the coast of Massachusetts, releasing the energy equivalent of 300 tons of TNT.

Well, maybe. The latest update from NASA says it might actually qualify as a meteorite, with radar data indicating that debris from the space rock may have fallen into Cape Cod Bay. For those unfamiliar, the difference between a meteor and a meteorite is whether or not any of the object survived its encounter with the atmosphere and made it down to the surface.

There’s an argument to be made that a larger asteroid would have likely set off some alarm bells as it approached the planet, but the fact that this deep space interloper showed up unannounced is a sobering reminder that our ability to detect incoming threats isn’t nearly as robust as we’d like. Fortunately, it looks like the event didn’t result in any serious damage or injury.

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A Camera Viewfinder Makes A Great TV

May 31, 2026 by No comments

When we think of CRT camera viewfinders, most of us probably imagine the tiny CRTs you’d find in a 1980s camcorder. They’re super cute and a load of fun to play with, but they’re very much a consumer device. Professional cameras of the type you’d find in a studio had their own viewfinders, which were a lot closer to a small TV. They’re about as high quality as it gets for a monochrome CRT, and [Evan Monsma] has done the conversion to a general-purpose monitor.

On one side, this is a very straightforward hack, simply a case of tracing wires to identify the power and video pins. Given a tool battery, the monitor fires up and gives a super-sharp picture. What we like about this is the wooden base he’s made for the thing, at the same time rough-and-ready, and professional-looking from the outside. It has a routed space for the cables, and once mounted flush with the monitor base and given a bit of wood stain, it looks almost as though it was manufactured that way.

It’s likely most of us won’t find a broadcast viewfinder in the trash, instead settling at best for a little Chinese portable TV. But it’s still interesting to see these unusual devices. Perhaps it might make a good cyberdeck.

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4-bit Relay Logic Counter Begs To Have Its Buttons Pushed

May 31, 2026 by 1 Comment

What’s one to do with some nice little relays of questionable pinout, and prototyping board? How about a quietly clicky 4-bit counter using relay logic with tons of buttons?

The register with LEDs and buttons is on the top board, the incrementer on the bottom board.

[Agatha Mallett] made the counter after finding herself in possession of a quantity of relays burdened by terrible documentation (the datasheet shockingly lacks a pinout, and doesn’t even mention the coil being unidirectional). But since the relays are also small and of decent quality, they were a good candidate for a small relay logic-based project.

The key to the build is implementing D-type flip-flops using relays. This is done by holding the coil voltage of each relay between its set and release voltage levels. A small voltage bump will energize the coil, closing the relay and leaving it closed. Conversely, a small negative spike releases the coil, leaving it open. This forms the basis of the counter, and [Agatha] has a separate write-up all about the details of using relays in this way.

Implementing this was rather less straightforward than it may sound because it relies on balancing the coils of many relays on a figurative knife-edge of voltage, but not every component is perfectly identical. A tweaked resistor or capacitor here and there was needed before things settled into reliability.

The end product has indicator LEDs, buttons to increment or clear the current count, and it even has buttons to set or clear individual bits. This is a project that begs to be interacted with, and there’s a short video on the project page so you can watch it go through its paces.

Thanks to [Jess] for the tip!

Loading Sega Genesis Games Off A Vinyl Record

May 31, 2026 by 13 Comments

Recently [Throaty Mumbo] took a poke at another daft idea, in the form of loading Sega Genesis games off vinyl records. Although a whacky idea, it’s made possible through the use of a Mega Everdrive Pro and its ability to load games via its USB port, a feature mostly intended for on-the-fly game development without swapping SD cards.

For a few decades in home computing, the loading of software from cassette tapes and similar media was very common. This was due to the low-cost nature of this ubiquitous technology compared to alternatives like cartridges and floppy disks. Even if it was famously unreliable and slow, this accessibility made it a very popular choice. This is where home game consoles were different, as they generally used very fast cartridges, but what if you merge these two worlds?

As demonstrated, a Pico 2 board with its RP2350 MCU is used to convert the audio signal containing the binary data into data for transmission via USB to the Everdrive cartridge. After confirming that it works with a tape drive, he drags in a plastic-y PO-80 5″ record cutter and player, where the mono audio limitation is not a problem.

Unfortunately, this PO-80 turns out to be exactly the kind of toy it looks like, with [Throaty Mumbo] unable to cut and play back a record that gets a clean enough signal to the Pico 2 board, though with a better player and likely record cutter it should work fine. After all, some magazines back in the day came with plastic ‘vinyl’ records that contained programs you could load from your record player.

Although technically a failure, it does demonstrate that if you are very patient, you can totally load Sega Genesis ROMs off a tape or record at a blistering couple of kB/s, tops.

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