It’s that time of year again here in Germany. The mulled wine flows all night long at the Christmas markets, the Krampus runs wild in the streets, and hackers are perched frantically behind their keyboards and soldering irons, trying to get their last minute projects “finished” for the 36th annual Chaos Communication Congress (36C3) in Leipzig.
We’ll have an assembly for all fans and friends of the Jolly Wrencher, so if you’re coming to Congress, you can come join us or at least stop by and say hi. [Elliot] and [Sven] and a number of Hackaday.io luminaries will be on hand. (Ask us about secret stickers and an as-yet unannounced upcoming Hackaday conference.)
Even if you’re not able to make it, you should keep your eyes on Hackaday from the 27th to the 30th, because we’ll be reporting on the best of Congress. But you don’t have to take our word for it: the Chaos Computer Club makes all of the talks available on livestream during the event, many with simultaneous translation, and final edited versions often appearing just a few hours afterwards.
We’ve looked through the schedule, and it’s going to be a hum-dinger! Gather ’round the glowing box with your friends at your own local hackerspace, or call in sick from work and make yourself some popcorn. This is must-see nerd TV.
Whether you’ve been naughty or nice, swing by our assembly if you’re going to be in Leipzig for the last few days of 2019. See you there!
Easy access to reliable electrical power is something a lot of us take for granted, but in developing countries or after natural disaster, it can be a rare commodity. [Daniel Connelly] has been working hard to develop infrastructure people can build themselves, and his latest project is a 200 W water turbine (video after the break) that can be built for about $50.
The core of the system is a wheel and motor from a hoverboard. What looks like 110 mm PVC tubing is connected together in a U-shape that can be mounted over the wall of a man-made channel. The inlet side is shorter than the outlet, and the system must be filled with water to allow the flow to start, like a siphon. The first two versions had the impeller sitting on the end of the outlet tube. V1 used a scrap plastic radial impeller of unknown origin, and did not work at all. V2 had a 3D printed impeller that worked pretty well, but the rotation speed wasn’t high enough to produce the voltage that [Daniel] wanted.
V3 used a large computer fan that was mounted in the short horizontal piece of section of tubing at the top of the system. It worked spectacularly well, producing about 55 V AC over a single phase of the motor, which should hopefully end up producing about 90 V DC and 200-500 W after rectifying the 3-phase motor output. This only however indicative, we would really like to see it tested with different loads connected. The output will also be dependent on the flow rate and head pressure of a particular stream/channel/river, and [Daniel] admits that they had pretty much ideal conditions for their tests. If hoverboard motors are hard to come by, a motorcycle alternator should also work well.
[Daniel] is still working out the kinks of the system, but as with his other designs on OpenSourceLowTech he will release the full open source design and tutorials as soon as he is ready. We are looking forward to seeing the system implemented out in the wild. For off-grid power, home built and 3D printed wind generators are another popular topic around here, if you don’t have a handy channel nearby.
When [DonHo] sang about tiny bubbles, he probably wasn’t thinking of them embedded in glycerine. But that’s where the bubbles in [ShinodaY]’s clock reside. The viscous fluid holds the bubbles better allowing the time to be read more easily. You can watch the relaxing display in the video below.
The theory of operation is simple and reminds us somehow of a reverse Tetris game. Solenoid valves at the base release air bubbles to form a row of the display. The bubbles rising makes room for the next row. The display has as many columns as there are air outlets at the bottom. Spacing the bubble pixels is as simple as adjusting the timing between air bubbles.
After a decade in development, the Boeing CST-100 “Starliner” lifted off from pad SLC-41 at the Cape Canaveral Air Force Station a little before dawn this morning on its first ever flight. Officially referred to as the Boeing Orbital Flight Test (Boe-OFT), this uncrewed mission was intended to verify the spacecraft’s ability to navigate in orbit and safely return to Earth. It was also planned to be a rehearsal of the autonomous rendezvous and docking procedures that will ultimately be used to deliver astronauts to the International Space Station; a capability NASA has lacked since the 2011 retirement of the Space Shuttle.
Unfortunately, some of those goals are now unobtainable. Due to a failure that occurred just 30 minutes into the flight, the CST-100 is now unable to reach the ISS. While the craft remains fully functional and in a stable orbit, Boeing and NASA have agreed that under the circumstances the planned eight day mission should be cut short. While there’s still some hope that the CST-100 will have the opportunity to demonstrate its orbital maneuverability during the now truncated flight, the primary focus has switched to the deorbit and landing procedures which have tentatively been moved up to the morning of December 22nd.
While official statements from all involved parties have remained predictably positive, the situation is a crushing blow to both Boeing and NASA. Just days after announcing that production of their troubled 737 MAX airliner would be suspended, the last thing that Boeing needed right now was another high-profile failure. For NASA, it’s yet another in a long line of setbacks that have made some question if private industry is really up to the task of ferrying humans to space. This isn’t the first time a CST-100 has faltered during a test, and back in August, a SpaceX Crew Dragon was obliterated while its advanced launch escape system was being evaluated.
We likely won’t have all the answers until the Starliner touches down at the White Sands Missile Range and Boeing engineers can get aboard, but ground controllers have already started piecing together an idea of what happened during those first critical moments of the flight. The big question now is, will NASA require Boeing to perform a second Orbital Flight Test before certifying the CST-100 to carry a human crew?
Let’s take a look at what happened during this morning’s launch.
The Numitron was a type of display popular in the 1970s, and often used in aircraft avionics and other high-end hardware. The display is a 7-segment type, but using filaments instead of LEDs. [sjm4306] was able to lay his hands on four of these devices, along with some bulbs to act as the digit seperator and AM/PM indicator. Due to being incandescent in nature, multiplexing wasn’t a practical option, with lower duty cycles drastically dimming the display. Instead, a 32-bit cascaded shift register was used to enable all the segments to be driven at the same time.
It’s a great build that uses some genuine original display hardware to create a clock with a compelling vintage aesthetic. This would make a great gift to a pilot from the era, or any hacker that likes the unusual display technologies of yesteryear. You can even build a Numitron watch, if you’re so inclined. Video after the break.
We’ve all seen the IoT device security trainwrecks: those gadgets that fail so spectacularly that the comment section lights up with calls of “were they even thinking about the most basic security?” No, they probably weren’t. Are you?
Hackaday Contributor and all around good guy Kerry Scharfglass thinks about basic security for a living, and his talk is pitched at the newcomer to device security. (Embedded below.) Of course “security” isn’t a one-size-fits-all proposition; you need to think about what threats you’re worried about, which you can ignore, and defend against what matters. But if you’ve never worked through such an exercise, you’re in for a treat here. You need to think like a maker, think like a breaker, and surprisingly, think like an accountant in defining what constitutes acceptable risks. Continue reading “Kerry Scharfglass Secures Your IoT Things”→
Macros are meant to make our lives easier, but they live up to this promise with mixed results. Generally speaking, a macro is a special combination of keys on the keyboard that execute a custom task — their goal is to speed up your productivity by getting away from mousing through menus. But once a macro requires more than two keys, they can get a bit cumbersome to input. I have personally found that repeated use of macros that require ctrl+shift can potentially cause problems. I don’t know about you (and your repetitive stress mileage may vary), but personal injury is the polar opposite of what I want from something that’s supposed to be convenient.
I love keyboard shortcuts, and not just because I prefer keyboard navigation in general. A lot of little things about writing for the web can be streamlined with shortcuts, like writing html tags and doing image manipulation. And I’m always looking for a better workflow to pin down my fleeting mental fragments, at least until that dark day that I can turn on Dropbox Thoughts™ and burn my brainwaves directly to disk.