From Printer To Vinyl Cutter

July 2, 2021 by 14 Comments

Some might look at a cheap inkjet printer and see a clunky device that costs more to replace the ink than to buy a new one. [Abhishek Verma] saw an old inkjet printer and instead saw a smooth gantry and feed mechanism, the perfect platform to build his own DIY vinyl cutter.

The printer was carefully disassembled. The feed mechanism was reworked to be driven by a stepper motor with some 3D printed adapter plates. A solenoid-based push/pull mechanism for the cutting blade was added with a 3D printed housing along with a relay module. An Arduino Uno takes in commands from a computer with the help of a CNC GRBL shield.

What we love about this build is the ingenuity and reuse of parts inside the old printer. For example, the old PCB was cut and connectors were re-used. From the outside, it’s hard to believe that HP didn’t manufacture this as a vinyl cutter.

If you don’t have a printer on hand, you can always use your CNC as a vinyl cutter. But if you don’t have a CNC, [Abhishek] shares all the STL files for his cutter as well as the schematic. Video after the break.

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An OSHW IR Remote Control Powered By The ATtiny13A

July 2, 2021 by 15 Comments

The new hotness in consumer electronics might be RF remotes based on protocols like Bluetooth Low Energy, but there’s still plenty of life left in the classic infrared remote. Especially with projects like TinyRemoteXL from [Stefan Wagner], which let you build and program an IR “clicker” of your own. Whether you want to spin up your own custom universal remote or create a beefed up version of the TV-B-Gone, this open source effort is a great place to start.

The original TinyRemote.

As you might have guessed from the name, this project is actually a larger version of the TinyRemote that [Stefan] put together previously. The documentation for that project goes a bit more into the nuts and bolts of talking IR, and is definitely worth a read if you’re into the low level stuff. For the original five button TinyRemote, the hardware consists of little more than a ATtiny13A microcontroller, a pair of IR LEDs, and the transistors to drive them.

But on the XL, things are a bit trickier as there are now twelve buttons for the ATtiny13A to read. Obviously there aren’t enough pins to read so many buttons directly, but with a combination of BAS16TW diode arrays and resistors, [Stefan] is able to detect what button was pressed using the chip’s interrupt pin and ADC. Certainly a handy trick to have in the back of your mind, and the open source nature of this project gives you a great chance to see how it’s implemented.

Between this project and the impressive development board [Djordje Mandic] released recently, it seems we’re looking at something of an infrared hacking revival. Earlier this year we even saw the commercial release of an IR-equipped ESP8266 board.

Throne Of Dev: An Endgame Office Chair

July 2, 2021 by 21 Comments

They say you shouldn’t cheap out on anything that comes between you and the ground. Typically, that list includes shoes, tires, and mattresses. But it’s 2021, and it’s high time to add ‘office chair’ to that list. Take it from someone who bought a handful of hundred-dollar office chairs and finally invested in an Aeron. Your throne makes a difference.

We’re not sure if there is conclusive evidence of this phenomenon, but it seems that for many people, the fastest way to get those creative juices flowing is to lean back and put your feet up. Now it’s one thing to lean back in an office chair and hold yourself there, but it’s quite another to sit in, say, a recliner that keeps the position for you. What if there was an office chair that could switch between the two? [Peter van der Walt] has been working from home for a decade now and will soon be moving to a new base of operations. The new space has a little office next to the main area, so it’s the perfect opportunity to build the dream chair — a day-to-night endgame throne for working, gaming, and everything in between.

[Peter] is working with some cyborg additions to his body and doesn’t care for the standard office chair fare. Currently, he splits his sits between a plastic chair like you’d find outside a coffee house (hey, whatever works best) and a cushy recliner. The idea is to find comfort and focus, and build something comfortable enough to accommodate the occasional afternoon siesta. It will be completely CNC-machineable from 18 mm plywood, and will probably have some upholstery eventually. Your ideas for feature creep are welcome below, or better yet, in the discussion area of the project page.

Some of us like to stand once in a while, but don’t want to go all in on a robotic desk. There are budget-friendly ways around that problem too, of course.

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The Trouble With Hubble: Payload Computer Glitch Stops Science At The Space Observatory

July 2, 2021 by 21 Comments

The Hubble Space Telescope’s remarkably long service life and its string of astonishing contributions to astronomy belie its troubled history. Long before its launch into low Earth orbit in 1990, Hubble suffered from design conflicts, funding and budgetary pressures, and even the death of seven astronauts. Long delayed, much modified, and mistakenly sent aloft with suboptimal optics, Hubble still managed to deliver results that have literally changed our view of the universe, and is perhaps responsible for more screensaver and desktop pictures than any other single source.

But all of that changed on June 13 of this year, when Hubble suffered a computer glitch that interrupted the flow of science data from the orbiting observatory. It’s not yet clear how the current issue with Hubble is going to pan out, and what it all means for the future of this nearly irreplaceable scientific asset. We all hope for the best, of course, but while we wait to see what happens, it’s worth taking the opportunity to dive inside Hubble for a look at its engineering and what exactly has gone wrong up there.

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Hackaday Podcast 125: Linux Users Talking Windows 11, Pop Bottle Filament, Old Phones With Modern Guts, And Eavesdropping In RF

July 2, 2021 by 4 Comments

Hackaday editors Mike Szczys and Elliot Williams look through the most interesting hacks of the week. We spent ample time in adulation of the automatons built by François Junod; wizard-level watchmaking wrapped in endless levels of artistic detail. A couple projects stuffed into old cellphones turned Elliot’s head. We got to see what happens if you spin a gear’s teeth on two axes to make a universal spherical gear. And we conclude the episode with a look at how Windows 11 may send a lot of good hardware to recycle center, and at how toothpaste tubes sometimes miss the recycling center completely.

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!

Direct download (55 MB or so.)

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Discarded Plastic Laser-Cut And Reassembled

July 2, 2021 by 15 Comments

The longevity of plastic is both a blessing and a curse. On the one hand, it’s extremely durable, inexpensive, and easy to work with, but it also doesn’t biodegrade and lasts indefinitely in the environment when not disposed of properly. While this can mean devastating impacts to various ecosystems, it can also be a benefit if you happen to pick this plastic up and also happen to have a laser cutter around.

After cleaning and sorting plastic that they had found from various places, including scraps from a 3D printing facility, the folks at [dinalab] set about turning waste plastic into something that would be usable once more. After sorting it they shredded it and then melted it into sheets. They found that a sandwich press yielded the best results, as it kept the plastic at a low enough temperature to keep it from burning. Once its off of the press and properly cooled, the flat sheets of plastic can be sent to the laser cutter to be made into whatever useful thing they happen to need.

Not only does this process reuse plastic that would otherwise end up in the landfill (or worse, the ocean), it can also reuse plastic from itself since the scraps can be re-melted back into sheets. Plastic does lose some of its favorable material properties with repeated heat cycles, but we’d have to imagine this is negligible for the types of things that [dinalab] is creating. Of course, you can always skip the heat cycles entirely and turn waste plastic directly into 3D printer filament instead.

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This Week In Security: Bad Signs From Microsoft, An Epyc VM Escape

July 2, 2021 by 14 Comments

Code signing is the silver bullet that will save us from malware, right? Not so much, particularly when vendors can be convinced to sign malicious code. Researchers at G DATA got a hit on a Windows kernel driver, indicating it might be malicious. That seemed strange, since the driver was properly signed by Microsoft. Upon further investigation, it became clear that this really was malware. The file was reported to Microsoft, the signature revoked, and the malware added to the Windows Defender definitions.

The official response from Microsoft is odd. They start off by assuring everyone that their driver signing process wasn’t actually compromised, like you would. The next part is weird. Talking about the people behind the malware: “The actor’s goal is to use the driver to spoof their geo-location to cheat the system and play from anywhere. The malware enables them to gain an advantage in games and possibly exploit other players by compromising their accounts through common tools like keyloggers.” This doesn’t seem to really match the observed behavior of the malware — it seemed to be decoding SSL connections and sending the data to the C&C server. We’ll update you if we hear anything more on this one.
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