Roboticist Grant Imahara Of Mythbusters Fame Dies Of Aneurysm At Age 49

July 14, 2020 by 45 Comments

We awake this morning to sad news of the premature passing of Grant Imahara at the age of 49 due to a brain aneurysm. Grant was best known for his role on the wildly popular Mythbusters television show on which he starred and built test apparatus for seasons three through twelve. He landed this role because he was a badass hardware hacker as much as he was an on-camera personality.

Grant received his degree in electrical engineering from USC in 1993 and landed a job with Lucasfilm, finding his way onto the Industrial Light and Magic team to work on blockbuster films like the Star Wars prequels (R2-D2 among other practical effects) and sequels to Terminator and The Matrix. Joining the Mythbusters team in 2005 was something of a move to rapid prototyping. Each of the 22-minute episodes operated on a 10-day build and a film cycle in which Grant was often tasked with designing and fabricating test rigs for repeatable testing with tightly controlled parameters.

After leaving the show, Grant pursued several acting opportunities, including the Kickstarter funded web series Star Trek Continues which we reported on back in 2013. But he did return to the myth busting genre with one season of The White Rabbit Project on Netflix. One of the most genuinely geeky appearances Grant made was on an early season of Battlebots where his robot ‘Deadblow’ sported a wicked spiked hammer. Video of his appearance in the quarter-finals is like a time-capsule in hacker history and guaranteed to bring a smile to your face.

Grant Imahara’s legacy is his advocacy of science and engineering. He was a role model who week after week proved that questioning how things work, and testing a hypothesis to find answers is both possible and awesome. At times he did so by celebrating destructive force in the machines and apparatus he built. But it was always done with observance of safety precautions and with a purpose in mind (well, perhaps with the exception of the Battlebots). His message was that robots and engineering are cool, that being a geek means you know what the heck you’re doing, and that we can entertain ourselves through creating. His message lives on through countless kids who have grown up to join engineering teams throughout the world.

Grant was the headliner at the first Hackaday Superconference in San Francisco back in 2015. I’ve embedded the fireside chat below where you can hear in his own words what inspired Grant, along with numerous stories from throughout his life.

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SoftBank Robots Pinch Hit For Baseball Cheerleaders

July 13, 2020 by 11 Comments

Grand venues of spectacle to entertain audiences has long been a part of history, but such tradition is highly problematic at the moment in the light of the pandemic. Some sports leagues are testing the waters with a soft restart by playing only to a broadcast audience, leaving the stadium empty. Many experiments are in progress trying to liven up an empty stadium and this is where SoftBank saw an opportunity: as a multinational conglomerate that has both a baseball team and a robotics division, they called a team of robots to cheer-leading duty.

Some clips of the cheerleading squad in action have started circulating. A few people may greet the sight with an indifferent shrug, but most tend to fall to an extreme: either finding them hilarious or react with horror. It is only natural to have a strong reaction to such a jarring sight.

Spot was only available for sale recently, and we admit this was not the type of task that came to our minds. Pepper has a longer track record and this is not Pepper’s first baseball game. The humanoid robot has been around long enough to raise questions about a robot’s role in society from unionization to sex work. We haven’t made much progress answering those questions, and now we have even more questions that the lightweight SoftBank Robotics press release (in Japanese) didn’t try to answer.

When people fret about “robots taking our jobs” the conversation doesn’t usually involve sports team cheerleaders, yet here we are. Welcome to the future.

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Maybe One Of The Most Adorable Obstacle Avoiding Robots You’ve Seen

July 12, 2020 by 2 Comments

We’re all pretty well-acquainted with the obstacle avoiding robot. These little inventions use a proximity sensor to detect an object in front of the robot, then circumvent the object accordingly. Brown Dog Gadgets’ little robot really caught our eye, mostly because it’s kind of cute.

This little robot combines a few LEGO pieces, Arduino, and Brown Dog Gadgets’ own in-house invention, Crazy Circuits. The LEGO pieces make up the body of the robot, craftily enclosing a small portable battery pack used to power the bot. Brown Dog Gadgets uses another home-grown design, their robotics controller board, breaking out a few GPIO pins of an Arduino-compatible microcontroller into LEGO-compatible connections. This makes it easy to interface two of our favorite DIY STEM tools using a solderless connection.

Add a few LEGO wheels and a caster for pivoting and you’ve got a pretty simple, little robot. Fortunately, Brown Dog Gadgets was very thorough in their write-up, so head on over to their Instructable for all the details.

In the meantime, we’ve got a rich history of obstacle-avoiding robots here on Hackaday. Take a look around.

Robotic Cornhole Board Does The Electric Slide

July 9, 2020 by 9 Comments

There’s a reason why bowling lanes have bumpers and golf games have mulligans. Whether you’re learning a new game or sport, or have known for years how to play but still stink at it, everyone can use some help chasing that win. You’ve heard of the can’t-miss dart board and no-brick basketball goal. Well, here comes the robot-assisted game for the rest of us: cornhole.

The game itself deceptively simple-looking — just underhand throw a square wrist rest into a hole near the top of a slightly angled box. You even get a point for landing anywhere on the box! Three points if you make it in the cornhole. In practice, the game not that easy, though, especially if you’ve been drinking (and drinking is encouraged). But hey, it’s safer than horseshoes or lawn darts.

[Michael Rechtin] loves the game but isn’t all that great at it, so he built a robotic version that tracks the incoming bag and moves the hole to help catch it. A web cam mounted just behind the hole takes a ton of pictures and analyzes the frames for changes.

The web cam sends the bag positions it sees along with its predictions to an Arduino, which decides how it will move a pair of motors in response. Down in the cornhole there’s a pair of drawer sliders that act as the lid’s x/y gantry.

We love how low-tech this is compared to some of the other ways it could be done, even though it occasionally messes up. That’s okay — it makes the game more interesting that way. We think you should get 2 points if it lands halfway in the hole. Aim past the break to check out the build video.

Seems like there’s a robotic-assisted piece of sporting equipment for everything these days. If cornhole ain’t your thing, how’d you like to take a couple strokes off your golf game?

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DIY Baby MIT Cheetah Robot

July 5, 2020 by 7 Comments

3D printers have become a staple in most makerspaces these days, enabling hackers to rapidly produce simple mechanical prototypes without the need for a dedicated machine shop. We’ve seen many creative 3D designs here on Hackaday and [jegatheesan.soundarapandian’s] Baby MIT Cheetah Robot is no exception. You’ve undoubtedly seen MIT’s cheetah robot. Well, [jegatheesan’s] hack takes a personal spin on the cheetah robot and his results are pretty cool.

The body of the robot is 3D printed making it easy to customize the design and replace broken parts as you go. The legs are designed in a five-bar linkage with two servo motors controlling each of the four legs. An additional servo motor is used to rotate an HC-SR04, a popular ultrasonic distance sensor, used in the autonomous mode’s obstacle avoidance mechanism. The robot can also be controlled over Bluetooth using an app [jegatheesan] developed in MIT App Inventor.

Overall, the mechanics could use a bit of work — [jegatheesan’s] baby cheetah probably won’t outpace MIT’s robot any time soon — but it’s a cool hack and we’re looking forward to a version 3. Maybe the cheetah would make a cool companion bot?

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The Open Source Mars Rover, One Year Later

July 2, 2020 by 18 Comments

As the name implies, here at Hackaday we strive to bring you interesting projects every single day. But that doesn’t necessarily mean a project only gets one day to grace these storied pages. Quite the opposite, in fact. We’re always happy to revisit a project and find out how far it’s evolved since we last crossed paths with it, especially when the creators themselves reach out to give us an update.

Which is exactly what happened when [Jakob Krantz] recently wrote in to get us up to speed on this incredible open source rover project. We first saw this 3D printed Curiosity inspired robot a little less than a year ago, and at that point it was essentially just a big box with the distinctive NASA rocker-bogie suspension bolted on. Now it not only looks a lot closer to the Martian rovers that inspired it, but it’s also learned a number of new tricks that really take this project to the next level.

The articulated head and grabber arm don’t just help sell the Curiosity look, they’re actually functional. [Jakob] notes that he doesn’t have kinematics integrated yet, so moving the arm around is more for show than practical application, but in the future it should be able to reach out and grab objects. With the new cameras in the head, he’ll even be able to get a first person view of what he’s picking up.

Last year [Jakob] was using a standard RC transmitter to drive the rover around, but he’s since put together a custom controller that’s truly a thing of beauty. It uses an ESP32 and LoRa module to communicate with matching hardware inside the rover, as well as a smartphone clipped onto the top that’s displaying telemetry and video over WiFi. The controller is actually its own separate project, so even if you aren’t in the market for a scaled down Mars rover, its controller could come in handy for your next robotics project.

Presumably the multi-mission radioisotope thermoelectric generator (MMRTG) on the back of the rover is just pretend….but with this guy, we’re not so sure. Give him another year, and who knows.

Tracked Robot Makes Sand Drawings

June 24, 2020 by 6 Comments

[Ivan] seems to enjoy making 3D printed vehicles with tracks. His latest one uses 50 servo motors to draw patterns in the sand at the beach. You can see it work in the video below. Well, more accurately you can see it not work and then work as the first iteration didn’t go exactly as planned.

An Arduino Mega 2560 provides the brains and the whole unit weighs in at almost 31 pounds, including the batteries. We didn’t see Ivan’s design files, although it wouldn’t be hard to do your own take on the robot.

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