Pikul Servo Powered Falling Dominoes Pushing a Cube

Domino Row Goes With The Flow

May 30, 2022 by Michael Shaub 1 Comment

Around here, we’re always excited about a new actuator design. Linear actuators are particularly hard to make cheap, fast, and good, so it’s even better when something new that we can build ourselves slides onto the scene.

Researchers at U Penn’s Pikul Research Group took inspiration from the cascade of falling dominoes for an innovative take on linear motion. This article on IEEE Spectrum describes the similarity of the sequential tipping-over with the peristaltic motion of biological systems, including you, swallowing right now.

The motion propagation in falling dominoes, called a Soliton Wave, can be harnessed to push an object at the front of the wave, just like a surfer. See the videos after the break for examples of simple setups that any of us could recreate with laser-cut or 3D printed parts. Maybe you won’t be using them to help a robot swallow (a terrifying idea that the article suggests), but you might need a conveyor or a novel way to help a device crawl like a shrimp. The paper is behind a paywall on IEEE, though you readers likely see enough in the videos to get started, and we can’t wait to see where your dominoes will lead us next.

Silicon Carbide Chips Can Go To Hell

May 3, 2021 by Al Williams 75 Comments

IEEE Spectrum had an interesting read about circuits using silicon carbide as a substrate. [Alan Mantooth] and colleagues say that circuits based on this or some other rugged technology will be necessary for missions to Venus, which they liken to hell. That might seem like hyperbole, but at about 460C with an atmosphere full of sulphuric acid, maybe it isn’t such a stretch. When the Soviets sent Venera 13 to Venus, it was able to send data for just over two hours before it was gone. You’d hope 40 years later we could do better.

Silicon carbide is a semiconductor made with an even mix of silicon and carbon. The resulting components can operate for at least a year at 500C. This high-temperature operation has earned them a place in solar energy and other demanding applications. [Alan], with the University of Arkansas along with colleagues from the KTH Royal Insitute of Technology in Stockholm are building test circuits aimed at developing high-temperature radios for use in environments like the one found on Venus.

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World Standard Organizations To Release Entirely Reworked Standards

April 1, 2016 by Gerrit Coetzee 28 Comments

After months of cross-disciplinary meetings, some of the largest professional associations just announced their plans to submit an entire standard set for engineers with egos too fragile to accept design criticism. The Special Snowflake Standard or S2 (in compliance with Godwin’s law) ensures compromised mechanical and electrical integrity by ignoring proper design methodologies for more fluid definitions of success. The Special Snowflake Standard allows the modern engineer greater flexibility in avoiding self-improvement in their field while maintaining an advanced level of apparent competency.

The Standard follows an ingenious randomly generated naming scheme to hinder cross-checking and look-up. The honesty being the only change from the current system. It took us a while to navigate the websites built to serve the standards, as they themselves were built to the W3C.S2.01.d.f4r.7 Special Snowflake Standard For Geriatric Exclusion From The Study of Modern Web Development and therefore were only accessible through the Gopher protocol running specifically on SPARC workstations.

Nonetheless, after working through multiple W3C.S2.u.r.f4.u17 Probably PEBKAC Self Exclusion Of Responsibility Standard errors, we found a few standards we’re really excited about. Let’s take a look at a the highlights:

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Why IoT Will Fail (and How To Save It)

September 3, 2015 by Al Williams 76 Comments

Buzzword technology has two possible fates: they fail and disappear or they succeed and disappear. Remember at one time “multimedia” and “networking” were buzzwords. They succeeded and now they’ve vanished into ubiquity. Of course, there are plenty of failed buzzwords (like telecosm) that you probably don’t even remember. They just vanished into obscurity.

Unless you’ve been living under the CNC mill in your local hackerspace, you’ve probably heard or read about the “Internet of Things” (IoT). Companies big and small have realized that getting in early on The Next Big Thing is good for share prices and, right now, IoT is where everyone is trying to make a play.

There’s two things I’d observe, though: First, IoT is far from new. Connecting embedded systems to the Internet is old hat (I even wrote a book called Embedded Internet Design way back in 2003). Second, the way it is going, IoT–in its current incarnation–is doomed.

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Foldable Quadrotor Is Origamilicious

May 26, 2015 by Elliot Williams 13 Comments

A team at the École Polytechnique Fédéral de Lausanne has developed and built a quadcopter with arms that unfold just before takeoff. The idea is that you can fold the device back up when you’re done with it, making it possible to store a bunch more of the quads in your backpack for instance.

The unfolding mechanism relies on the torque of the rotors spinning up to swing the arms into place. Once fully extended, a spring-loaded flap folds up, catches on some magnets, and forms an L-shaped structure that won’t re-fold without human intervention.

Under normal flying conditions, quads have a two left-handed propellers and two right-handed ones and the motors spin in opposite directions. In order to do the unfolding, two of the motors need to run essentially in reverse until the frame has clicked into place. They use a sensor (Hall effect?) to detect the arm locking, and then the rotors quickly switch back to their normal rotation before the quad hits the floor. In the video, they demonstrate that they’ve got this so well tuned that they can throw it up into the air to launch. Wow.

Everything’s still in prototype phase, and one of the next goals is “strengthening the arms so they can withstand crashes”, so don’t expect to see these in your local hobby store too soon. In the mean time, you’ll be able to see them in the flesh if you head up to the IEEE International Conference on Robotics and Automation in Seattle that started today and runs through Friday. If anyone goes, take more video and post in the comments?

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CES: Building Booths And Simulating Reality

January 7, 2015 by Mike Szczys 15 Comments

My first day on the ground at CES started with a somewhat amusing wait at the Taxi Stand of the McCarran International Airport. Actually I’m getting ahead of myself… it started with a surprisingly efficient badge-pickup booth in the baggage claim of the airport. Wait in line for about three minutes, and show them the QR code emailed to you from online registration and you’re ready to move to the 1/4 mile-long, six-switchback deep line for cabs. Yeah, there’s a lot of people here for this conference.

It’s striking just how huge this thing is. Every hotel on the strip is crawling with badge-wearing CES attendees. Many of the conference halls in the hotels are filled with booths, meaning the thing is spread out over a huge geographic area. We bought three-day monorail passes and headed to the convention center to get started.

Building the Booths

Emotive Insights headsets

Slot-car “brain racing” with scoreboard

[Sophi] knows [Ben Unsworth] who put his heart and soul into this year’s IEEE booth. His company, Globacore, builds booths for conferences and this one sounds like it was an exceptional amount of fun to work on. He was part of a tiny team that built a mind-controlled drag strip based on Emotive Insight brainwave measuring hardware shipped directly from the first factory production run. This ties in with the display screens above the track to form a leader board. We’ll have a keen eye out for hacks this week, but the story behind building these booths may be the best hack to be found.

Oculus

Oculus Gear VX uses a Galaxy Note 4 as the display

Sophi Kravitz trying out Oculus Gear VR

[Ben] told us hands-down the thing to see is the new Oculus hardware called Crescent Bay. He emphatically mentioned The Holodeck which is a comparison we don’t throw around lightly. Seems like a lot of people feel that way because the line to try it out is wicked long. We downloaded their app which allows you to schedule a demo but all appointments are already taken. Hopefully our Twitter plea will be seen by their crew.

In the meantime we tried out the Oculus Gear VR. It uses a Galaxy Note 4 as the screen along with lenses and a variety of motion tracking and user controls. The demo was a Zelda-like game where you view the scene from overhead. This used a handheld controller to command the in-game character with the headset’s motion tracking used to look around the playing area. It was a neat demo, I’m not quite sold on long gaming sessions with the hardware but maybe I just need to get used full-immersion first.

Window to another Dimension

The midways close at six o’clock and we made our way to the Occipital booth just as they were winding done. I’ve been 3D scanned a few times before but those systems used turntables and depth cameras on motorized tracks to do the work. This uses a depth-camera add-on for an iPad which they call Structure Sensor.

It is striking how quickly the rig can capture a model. This high-speed performance is parlayed into other uses, like creating a virtual world inside the iPad which the user navigates by using the screen as if it were a magic window into another dimension. Their demo was something along the lines of the game Portal and has us thinking that the Wii U controller has the right idea for entertainment, but it needs the performance that Occipital offers. I liked this experience more than the Oculus demo because you are not shut off from the real world as you make your way through the virtual.

We shot some video of the hardware and plan to post more about it as soon as we get the time to edit the footage.

Find Us or Follow Us

We’re wearing our Hackaday shirts and that stopped [Josh] in his tracks. He’s here on business with his company Evermind, but like any good hacker he is carrying around one of his passion projects in his pocket. What he’s showing off are a couple of prototypes for a CANbus sniffer and interface device that he’s build.

We’ll be at CES all week. You can follow our progress through the following Twitter accounts: @Hackaday, @HackadayPrize, @Szczys, and @SophiKravitz. If you’re here in person you can Tweet us to find where we are. We’re also planning a 9am Thursday Breakfast meetup at SambaLatte in the Monte Carlo. We hope you’ll stop by and say hi. Don’t forget to bring your own hardware!

Best Robot Demos From ICRA 2013

June 18, 2013 by Mike Szczys 17 Comments

best-robots-from-2013-ICRA

The 2013 IEEE International Conference of Robotics and Automation was held early in May. Here’s a video montage of several robots shown off at the event. Looks like it would have been a blast to attend, but at least you can draw some inspiration from such a wide range of examples.

We grabbed a half-dozen screenshots that caught our eye. Moving from the top left in clockwise fashion we have a segmented worm bot that uses rollers for locomotion. There’s an interesting game of catch going on in the lobby with this sphere-footed self balancer. Who would have thought about using wire beaters as wheels? Probably the team that developed the tripod in the upper right. Just below there’s one of the many flying entries, a robot with what looks like a pair of propellers at its center. The rover in the middle is showing off the 3D topography map it creates to find its way. And finally, someone set up a pool of water for this snake to swim around in.

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