You Can Find Military Radars On Publicly-Available Satellite Data

March 2, 2022 by Lewin Day 15 Comments

When it comes to hunting down military radar installations and associated hardware, we typically think of equipment that is firmly in the price bracket of nation states and their military forces. Whether it’s early warning radar, those used for air defence, or for naval purposes, you’d think it was relatively difficult to intercept or track these emissions.

However, a new tool built by geocomputation lecturer Ollie Ballinger shows this isn’t the case. In fact, openly-available data captured via satellite can be used to find all manner of military radar emitters. Let’s explore how!

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Human Power, Past And Future

March 1, 2022 by Al Williams 54 Comments

We will assume you’ve seen The Matrix — it was from 1999, after all. The surprise, at the end, was that humans were being used as human batteries to power a civilization of intelligent machines. But aside from just putting out some heat, the idea does have some precedent. After all, humans powered machines like mills, sewing machines, and pumps for centuries before there were good alternatives.

History

Galley ship — Reconstruction of a squadron of ancient Greek galley ships.

Early machines used hand cranks, treadwheels, treadles, and even pedal power to harness energy from humans. Consider, for example, an ancient galley ship with many oarsmen providing an engine. This wasn’t a great use of human power. An oarsman on a galley used his arms and back but didn’t much use his legs. The legs, though, have larger muscles and are often stronger. A pedal boat or racing shell would have been much more efficient, but without mass production of strong metal parts, it would have been difficult to build and maintain such machines in ancient times.

There was a time when pedals or treadles operated lots of machines from sewing machines to lathes. There were even old radios able to transmit and receive with no external power thanks to pedals as late as the 1940s.

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3D Printering: Giants

February 28, 2022 by Al Williams 17 Comments

Newton famously said, “If I see further than others, it is by standing upon the shoulders of giants.” For 3D printing, though, it might be the reverse. If a printer prints larger than others, it is probably using work developed for smaller printers. There are a variety of very large 3D printers out there now and you frequently see claims in the press of “world’s largest 3D printer.” Roboze, for example, makes that claim with a build volume of 1 meter on each axis.

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Logic Simulation Hack Chat With Al Williams

February 28, 2022 by Dan Maloney 3 Comments

Join us on Wednesday, March 2 at noon Pacific for the Logic Simulation Hack Chat with Al Williams!

Many of us probably remember — some fondly, some less so — our first encounter with a truth table. The little grid of ones and zeros seemed simple enough, but it held real power in its tabular representation of the output of a logic circuit for a given set of inputs. It’s what makes more complex logic circuits possible, but only up to a point — add enough gates, flip flops, and counters, and keeping track of what’s high and what’s low becomes problematic with just pencil and paper.

If you’ve reached the point where keeping your digital design in your head doesn’t work anymore, or if you never could keep your NANDs and NORs straight, then you’re ready for a digital logic simulator. Applications like Falstad and LogiSim let you build a design using everything from discrete logic gates to complete assemblies like adders, counters, and even arithmetic logic units. Add in some passives like capacitors and inductors, and a logic simulator may be the only tool you need to bring a design to life in the virtual world before ever touching a breadboard.

To help us figure out where logic simulators fit in our design processes, Hackaday Staff Writer Al Williams will hop onto the Hack Chat with us. Al ran a very successful FPGA Bootcamp series back in 2018, which included a review of digital logic using Falstad. He’ll expand on that in this Hack Chat, so come along with your questions and comments. You won’t want to miss this one!

Our Hack Chats are live community events in the Hackaday.io Hack Chat group messaging. This week we’ll be sitting down on Wednesday, March 2 at 12:00 PM Pacific time. If time zones have you tied up, we have a handy time zone converter.

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Hackaday Links: February 27, 2022

February 27, 2022 by Dan Maloney 15 Comments

If there’s one thing that can trigger people, it’s the printer racket. Printer manufacturers who put DRM-like features into their consumables are rightly viewed as Satan’s spawn, and while these monsters have been content so far to only put digital rights management features into their ink and toner cartridges, they appear to now have their rapacious gaze set on print media too. At least according to the good folks over at the Electronic Frontier Foundation, who claim that Dymo’s latest generation of label printers will have RFID tags in the label cartridges, apparently to prevent consumers from buying non-Dymo media. The company doesn’t bill it as a way to lock you into their exorbitantly priced consumables, of course; rather, this is an exciting new feature that’s called “Automatic Label Recognition,” which keeps track of what labels are installed and how many are left. Of course, this is just red meat to people like us, and we fully expect to see workarounds in the not-to-distant future.

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Classic Chat: Arko Takes Us Inside NASA’s Legendary JPL

February 25, 2022 by Tom Nardi 4 Comments

Started by graduate students from the California Institute of Technology in the late 1930s, the Jet Propulsion Laboratory (JPL) was instrumental in the development of early rocket technology in the United States. After being tasked by the Army to analyze the German V2 in 1943, the JPL team expanded from focusing purely on propulsion systems to study and improve upon the myriad of technologies required for spaceflight. Officially part of NASA since December of 1958, JPL’s cutting edge research continues to be integral to the human and robotic exploration of space.

For longtime friend of Hackaday Ara “Arko” Kourchians, getting a job JPL as a Robotics Electrical Engineer was a dream come true. Which probably explains why he applied more than a dozen times before finally getting the call to join the team. He stopped by the Hack Chat back in August of 2019 to talk about what it’s like to be part of such an iconic organization, reminisce about some of his favorite projects, and reflect on the lessons he’s learned along the way.

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Hackaday Podcast 157: Airtag Security, Warped 3D Printing, Suturing Grapes With A DIY Robot Arm, And The Wizard’s Calculator

February 25, 2022 by Tom Nardi No comments

This week Hackaday Editor-in-Chief Elliot Williams and Managing Editor Tom Nardi look at the week’s most interesting stories and projects, starting with the dystopian news that several people have had their bionic eye implants turn off without warning. We then pivot into an only slightly less depressing discussion about the poor security of Apple’s AirTags network and how it can be used to track individuals without their knowledge. But it’s not all doom and gloom. We’ll look at new projects designed to push the envelope of desktop 3D printing, and marvel at a DIY robotic arm build so accurate that it can put stitches in the skin of a grape. You’ll also hear about the surprisingly low cost of homebrew hydrophones, the uncomfortable chemistry behind wintergreen, and an early portable computer that looks like it came from Hogwarts School of Witchcraft and Wizardry.

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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