The TAK Ecosystem: Military Coordination Goes Open Source

September 8, 2022 by Danie Conradie 38 Comments

In recent years you’ve probably seen a couple of photos of tablets and smartphones strapped to the armor of soldiers, especially US Special Forces. The primary app loaded on most of those devices is ATAK or Android Tactical Assault Kit. It allows the soldier to view and share geospatial information, like friendly and enemy positions, danger areas, casualties, etc. As a way of working with geospatial information, its civilian applications became apparent, such as firefighting and law-enforcement, so CivTAK/ATAK-Civ was created and open sourced in 2020. Since ATAK-Civ was intended for those not carrying military-issued weapons, the acronym magically become the Android Team Awareness Kit. This caught the attention of the open source community, so today we’ll dive into the growing TAK ecosystem, its quirks, and potential use cases.

Tracking firefighting aircraft in 3D space using ADS-B (Credit: The TAK Syndicate)

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Ask Hackaday: Stripping Wires With Lasers

September 8, 2022 by Al Williams 22 Comments

Most of us strip the insulation off wires using some form of metal blade or blades. You can get many tools that do that, but you can also get by with skillfully using a pair of cutters, a razor blade or — in a pinch — a steak knife. However, modern assembly lines have another option: laser stripping. Now that many people have reasonable laser cutters, we wonder if anyone is using laser strippers either from the surplus market or of the do-it-yourself variety?

We are always surprised that thermal strippers are so uncommon since they are decidedly low-tech. Two hot blades and a spring make up the heart of them. Sure, they are usually expensive new, but you can usually pick them up used for a song. The technology for lasers doesn’t seem very difficult, although using the blue lasers most people use in cutters may not be optimal for the purpose. This commercial product, for example, uses infrared, but if you have a CO₂ laser, that might be a possibility.

The technique has found use in large-scale production for a while. Of course, if you don’t care about potential mechanical damage, you can get automated stripping equipment with a big motor for a few hundred bucks.

We did find an old video about using a CO₂ laser to strip ribbon cable, but nothing lately. Of course, zapping insulation creates fumes, but so does lasering everything, so we don’t think that’s what’s stopping people from this approach.

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Linux Fu: Eavesdropping On Serial

September 7, 2022 by Al Williams 21 Comments

In the old days, if you wanted to snoop on a piece of serial gear, you probably had a serial monitor or, perhaps, an attachment for your scope or logic analyzer. Today, you can get cheap logic analyzers that can do the job, but what if you want a software-only solution? Recently, I needed to do a little debugging on a USB serial port and, of course, there isn’t really anywhere to easily tie in a monitor or a logic analyzer. So I started looking for an alternate solution.

If you recall, in a previous Linux Fu we talked about pseudoterminals which look like serial ports but actually talk to a piece of software. That might make you think: why not put a piece of monitor software between the serial port and a pty? Why not, indeed? That’s such a good idea that it has already been done. When it works, it works well. The only issue is, of course, that it doesn’t always work.

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Retrotechtacular: Oh Boy! We’re Radio Engineers!

September 6, 2022 by Al Williams 44 Comments

It is a shame that there are fewer and fewer “nerd stores” around. Fry’s is gone. Radio Shack is gone. But the best ones were always the places that had junk. Silicon valley was great for these places, but they were everywhere. Often, they made their money selling parts to the repair trade, but they had a section for people like us. There’s still one of these stores in the Houston, Texas area. One of the two original Electronic Parts Outlets, or EPO. Walking through there is like a museum of old gear and parts and I am not ashamed to confess I sometimes drive the hour from my house just to wander its aisles, needing to buy absolutely nothing. It was on one of those trips that I spied something I hadn’t noticed before. A Remco Caravelle transmitter/receiver.

The box was clearly old and the styling of the radio was decidedly retro. You can tell it wasn’t catering to the modern market because it mentions: “play ham radio operator” which would surely mystify most of today’s kids. The unit was an AM receiver and a transmitter, complete with a morse code key and microphone. You can see a contemporary commercial for a similar unit from Remco, in the video below.

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Lithium-Ion Batteries Are Your Friends

September 6, 2022 by Arya Voronova 56 Comments

Need some kind of battery for a project? You can always find a few Lithium-Ion (LiIon) batteries around! They’re in our phones, laptops, and a myriad other battery-powered things of all forms – as hackers, we will find ourselves working with them more and more. Lithium-Ion batteries are unmatched when it comes to energy capacity, ease of charging, and all the shapes and sizes you can get one in.

There’s also misconceptions about these batteries – bad advice floating around, fearmongering videos of devices ablaze, as well as mundane lack of understanding. Today, I’d like to provide a general overview of how to treat your LiIon batteries properly, making sure they serve you well long-term.

What’s A Battery? A Malleable Pile Of Cells

Lithium-Ion batteries are our friends. Now, there can’t be a proper friendship if you two don’t understand each other. Lithium-Ion batteries are tailored for human needs by the factory that produced them. As for us hackers, we’ll want to learn some things.

First thing to learn – a single LiIon “unit” is called a cell. An average laptop contains three or six Li-Ion cells, a phone will have one, a tablet will have from one to three. What we refer to as “battery” is typically one or multiple cells, together with protection circuitry, casing and a separate connector – most of the time all three of these, but not always. The typical voltage is 3.6 V or 3.7 V, with maximum voltage being 4.2 V – these are chemistry-defined, the same for most kinds of cells and almost always written on the cell. Continue reading “Lithium-Ion Batteries Are Your Friends” →

2022 Hackaday Prize: Save The World Wildcard Challenge Begins Now

September 6, 2022 by Kristina Panos 13 Comments

Continuing the concept of saving planet Earth with gnarly, repeatable hacks, the fifth and final challenge of the 2022 Hackaday Prize is all about making the world better with smart and sustainable hardware. While the focus is still on saving the planet, this time, anything goes. Does your project not fit within the confines of a previous challenge? Here is your last chance to enter the 2022 Hackaday Prize: Start your entry today!

Go Wild!

We’ve already run contest rounds that focused on green power generation, recycling, hacking tech out of the landfills, and just finished up making our world more climate-resistant and connected. How else do you want to use your hacking powers to make the world a better place? Well, that’s up to you. This is the wildcard round, after all. If your project helps to keep this planet running for future generations, you can enter it here.

The Save the World Wildcard challenge starts right now and runs until October 16th. As with previous rounds, we’ll award one of ten $500 prizes to each finalist, and the best projects will have a chance at the overall 2022 Hackaday Prize. So get hacking!

Hackaday Links: September 4, 2022

September 4, 2022 by Dan Maloney 19 Comments

Say what you will about Tesla, but there’s little doubt that the electric vehicle maker inspires a certain degree of fanaticism in owners. We’re used to the ones who can’t stop going on about neck-snapping acceleration and a sci-fi interior. But the ones we didn’t see coming are those who feel their cars are so bad that they need to stage a hunger strike to get the attention of Tesla. The strike is being organized by a group of Tesla owners in Norway, who on their website enumerate a long list of grievances, including design defects, manufacturing issues, quality control problems, and customer service complaints. It’s not clear how many people are in the group, although we assume at least 18, as that’s the number of Tesla cars they used to spell out “HELP” in a parking lot. It’s also not clear how or even if the group is really off their feed, or if this is just a stunt to get the attention of Tesla honcho and notorious social media gadfly Elon Musk.

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