Hackaday Links: January 20, 2019

January 20, 2019 by Brian Benchoff 18 Comments

Let’s say you’re an infosec company, and you want some free press. How would you do that? The answer is Fortnite. Yes, this is how you hack Fortnite. This is how to hack Fortnite. The phrase ‘how to hack Fortnite’ is a very popular search term, and simply by including that phrase into the opening paragraph of this post guarantees more views. This is how you SEO.

Lasers kill cameras. Someone at CES visited the AEye booth, snapped a picture of an autonomous car at AEye’s booth, and the LIDAR killed the sensor. Every subsequent picture had a purple spot in the same place. While we know lasers can kill camera sensors, and this is a great example of that, this does open the door to a few questions: if autonomous cars have LIDAR and are covered in cameras, what’s going to happen to the cameras in an autonomous car driving beside another autonomous car? Has anyone ever seen more than one Cruise or Waymo car in the same place at the same time? As an aside, AEye’s company website’s URL is aeye.ai, nearly beating penisland.net (they sell pens on Pen Island) as the worst company URL ever.

This is something I’ve been saying for years, but now there’s finally a study backing me up. Lego is a viable investment strategy. An economist at Russia’s Higher School of Economics published a study, collecting the initial sale price of Lego sets from 1987 to 2015. These were then compared to sales of full sets on the secondary market. Returns were anywhere between 10 and 20% per year, which is crazy. Smaller sets (up to about 100 pieces) had higher returns than larger sets. This goes against my previous belief that a Hogwarts Castle, Saturn V, and UCS Falcon-heavy portfolio would outperform a portfolio made of cheap Lego sets. However, this observation could be tied to the fact that smaller sets included minifig-only packaging, and we all know the Lego minifig market is a completely different ball of wax. The Darth Revan minifig, sold as an exclusive for $3.99 just a few years ago, now fetches $35 on Bricklink. Further study is needed, specifically to separate the minifig market from the complete set market, but the evidence is coming in: Lego is a viable investment strategy, even when you include the 1-2% yearly cost of storing the sets.

Relativity Space got a launchpad. Relativity Space is an aerospace startup that’s building a rocket capable of lobbing my car into Low Earth Orbit with a methalox engine. They’re doing it with 3D printing. [Bryce Salmi], one of the hardware engineers at Relativity Space, recently gave a talk at the Hackaday Superconference about printing an entire rocket. The design is ambitious, but if there’s one device that’s perfectly suited for 3D printing, it’s a rocket engine. There are a lot of nonmachinable tubes going everywhere in those things.

Inventors Chasing Their Dreams; What It’s Like To Quit Your Job And Hack

January 18, 2019 by Tom Nardi 13 Comments

The phrase “Hindsight is 20/20” is one of those things that we all say from time to time, but rarely have a chance to truly appreciate to the fullest. Taken in the most literal context, it means that once you know the end result of a particular scenario, you can look back and clearly see the progression towards that now inescapable endgame. For example, if you’re stuck on the couch with a bad case of food poisoning, you might employ the phrase “Hindsight is 20/20” to describe the decision a few days prior to eat that food truck sushi.

Then again, it’s usually not that hard to identify a questionable decision, with or without the benefit of foreknowledge. But what about the good ones? How can one tell if a seemingly unimportant choice can end up putting you on track for a lifetime of success and opportunity? If there’s one thing Michael Rigsby hopes you’ll take away from the fascinating retrospective of his life that he presented at the 2018 Hackaday Superconference, it’s that you should grab hold of every opportunity and run with it. Some of your ideas and projects will be little more than dim memory when you look back on them 50 years later, but others might just end up changing your life.

Of course, it also helps if you’re the sort of person who was able to build an electric car at the age of nineteen, using technology which to modern eyes seems not very far ahead of stone knives and bear skins. The life story Michael tells the audience, complete with newspaper cuttings and images from local news broadcasts, is one that we could all be so lucky to look back on in the Autumn of our years. It’s a story of a person who, through either incredible good luck or extraordinary intuition, was able to be on the forefront of some of the technology we take for granted today before most people even knew what to call it.

From controlling his TRS-80 with his voice to building a robotic vacuum cleaner years before the Roomba was a twinkle in the eye of even the most forward thinking technofetishist, Michael was there. But he doesn’t hold a grudge towards the companies who ended up building billion dollar industries around these ideas. That was never what it was about for him. He simply loves technology, and wanted to show his experiments to others. Decades before “open source” was even a term, he was sharing his designs and ideas with anyone who’d care to take a look.

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Hackaday Podcast 002: Curious Gadgets And The FPGA Brain Trust

January 18, 2019 by Mike Szczys 8 Comments

In this week’s podcast, editors Elliot Williams and Mike Szczys look back on favorite hacks and articles from the week. Highlights include a deep dive in barn-door telescope trackers, listening in on mains power, the backstory of a supercomputer inventor, and crazy test practices with new jet engine designs. We discuss some of our favorite circuit sculptures, and look at a new textile-based computer and an old server-based one.

This week, a round table of who’s-who in the Open Source FPGA movement discusses what’s next in 2019. David Shah, Clifford Wolf, Piotr Esden-Tempski, and Tim Ansell spoke with Elliot at 35C3.

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 (60 MB or so.)

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Hack Your Gmail: A Quick Start For Google App Scripting

January 17, 2019 by Al Williams 18 Comments

For many people, Gmail is synonymous with e-mail. Some people like having cloud access to everything and some people hate having any personal data in the cloud. However you feel about it, one thing that was nice about having desktop software is that you could hack it relatively easily. If you didn’t like how your desktop mail client worked, you had a lot of options: use a different program, write your own, hack the executable of your current program, or in the case of open source just fork it and make any changes you are smart enough to make.

Google provides a lot of features with all of its products, but however you slice it, all the code runs on their servers out of your reach. Sort of. If you know JavaScript, you can use Google Apps Script to add features to many Google products including Gmail. If you’ve used Office scripting, the idea is the same, although obviously the implementation is very different.

With scripting you can make sophisticated filters that would be very hard to do otherwise. For example, monitor for suspicious messages like those with more than 4 attachments, or that appear to come from a contact between the hours of 2AM and 5AM.

For our example today, I’m going to show you something that is easy but also highly useful.

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Plastics: Acrylic

January 16, 2019 by Dan Maloney 32 Comments

If anything ends up on the beds of hobbyist-grade laser cutters more often than birch plywood, it’s probably sheets of acrylic. There’s something strangely satisfying about watching a laser beam trace over a sheet of the crystal-clear stuff, vaporizing a hairs-breadth line while it goes, and (hopefully) leaving a flame-polished cut in its wake.

Acrylic, more properly known as poly(methyl methacrylate) or PMMA, is a wonder material that helped win a war before being developed for peacetime use. It has some interesting chemistry and properties that position it well for use in the home shop as everything from simple enclosures to laser-cut parts like gears and sprockets.

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New Contest: 3D Printed Gears, Pulleys, And Cams

January 16, 2019 by Mike Szczys 40 Comments

One of the killer apps of 3D printers is the ability to make custom gears, transmissions, and mechanisms. But there’s a learning curve. If you haven’t 3D printed your own gearbox or automaton, here’s a great reason to take the plunge. This morning Hackaday launched the 3D Printed Gears, Pulleys, and Cams contest, a challenge to make stuff move using 3D-printed mechanisms.

Adding movement to a project brings it to life. Often times we see projects where moving parts are connected directly to a servo or other motor, but you can do a lot more interesting things by adding some mechanical advantage between the source of the work, and the moving parts. We don’t care if it’s motorized or hand cranked, water powered or driven by the wind, we just want to see what neat things you can accomplish by 3D printing some gears, pulleys, or cams!

No mechanism is too small — if you have never printed gears before and manage to get just two meshing with each other, we want to see it! (And of course no gear is literally too small either — who can print the smallest gearbox as their entry?) Automatons, toys, drive trains, string plotters, useless machines, clockworks, and baubles are all fair game. We want to be inspired by the story of how you design your entry, and what it took to get from filament to functional prototype.

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New Part Day: SMD Batteries

January 16, 2019 by Brian Benchoff 60 Comments

Here’s a tip for all you retrocomputing enthusiasts or even anyone with an old computer in the garage. Go remove the battery. Yes, that old mid-90s desktop has a battery inside for the real-time clock, and it’s a ticking time bomb. Batteries leak, and they’ll spew goo all over the circuit board, irreparably damaging your piece of electronic nostalgia. This goes for all electronics, too: that badge collection is going to be a pile of broken fiberglass in a decade. Remove your batteries now.

While lithium cells soldered to a motherboard will leak, now there might be a new technology that will allow our modern electronics to last for decades. It’s a solid state battery. The FDK Corporation is now handing out samples of a battery that looks like a large SMD cap. They come on tape and reel, and they’ll never leak.

Thanks to massive investments in battery research, batteries are getting more power-dense, and form factors are getting weird. Your AirPods need a battery somewhere, and manufacturers are figuring out the best way to put a battery into something that can be assembled by a pick and place machine. This battery is the answer to these problems, packing a 3.0 V, 140 μAh lithium cobalt pyrophosphate cell into a package that is just 4 mm by 2 mm by 2 mm. It’s a battery that looks a surface mount component, and it’s installed the same way: this is a pick-and-placeable battery.

While the capacity of this battery is tiny — a 1225 coin cell has a capacity of about 50 mAh, and this battery has a capacity of 140 μAh, three whole orders of magnitude smaller — sometimes that’s all you need. If you need a battery for a RTC, this SMD battery will work.