Hacked Hoverboards Become Potent RC Tank

Hoverboards were the darling, or perhaps the scourge, of the last few years, Banned by vigilant airlines, they’re a great way to break an ankle or set your house on fire. However, they’re also a treasure trove of valuable parts for hacking, as [Aaron] ably demonstrates with his RC tank build.

[Aaron’s] build utilizes not only the hoverboard’s torquey hub motors but also the original control hardware, too. This is a cinch to repurpose, thanks to the custom firmware for the original controller developed by [Niklas Fauth], whose work we have featured before.

The hacked parts are crammed into a chassis built with aluminum extrusion, and the final result is a nimble and robust tank with one motor per wheel. This enables some exciting driving dynamics. Additionally, with all the torque available, [Aaron] is even able to ride the tank like an electric skateboard.

It’s a fun build that shows off the raw power available from the hoverboard hardware. We fully expect to see these parts remain popular in the hacking scene in the coming years. Video after the break.

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Hackaday Links: August 11, 2019

By the time this goes to press, DEFCON 27 will pretty much be history. But badgelife continues, and it’d be nice to have a way of keeping track of all the badges offered. Martin Lebel stepped up to the challenge with a DEF CON 27 badgelife tracker. He’s been tracking the scene since March, and there are currently more than 170 badges, tokens, and shitty add-ons listed. Gotta catch ’em all!

Nice tease, Reuters. We spotted this story about the FAA signing off on beyond-visual-line-of-sight, or BVLOS, operation of a UAV. The article was accompanied by the familiar smiling Amazon logo, leading readers to believe that fleets of Amazon Prime Air drones would surely soon darken the skies with cargoes of Huggies and Tide Pods across the US. It turns out that the test reported was conducted by the University of Alaska Fairbanks along an oil pipeline in the Last Frontier state, and was intended to explore medical deliveries and pipeline surveillance for the oil industry. The only mention of Amazon was that the company reported they’d start drone deliveries in the US “in months.” Yep.

Ever wonder what it takes to get your widget into the market? Between all the testing and compliance requirements, it can be a real chore. Nathaniel tipped us off to a handy guide written by his friend Skippy that goes through the alphabet soup of agencies and regulations needed to get a product to market – CE, RoHS, WEEE, LVD, RED, CE for EMC. Take care of all that paperwork and you’ll eventually get a DoC and be A-OK.

A French daredevil inventor made the first crossing of the English Channel on a hoverboard on Sunday. Yes, we know it’s not an “actual” hoverboard, but it’s as close as we’re going to get with the physics we have access to right now, and being a stand-upon jet engine powered by a backpack full of fuel, it qualifies as pretty awesome. The report says it took him a mere 20 minutes to make the 22-mile (35-km) crossing.

We had a grand time last week around the Hackaday writing crew’s secret underground lair with this delightful Hackaday-Dilbert mashup-inator. Scroll down to the second item on the page and you’ll see what appears to be a standard three-panel Dilbert strip; closer inspection reveals that the text has been replaced by random phrases scraped from a single Hackaday article. It looks just like a Dilbert strip, and sometimes the text even makes sense with what’s going on in the art. We’d love to see the code behind this little gem. The strip updates at each page load, so have fun.

And of course, the aforementioned secret headquarters is exactly what you’d picture – a dark room with rows of monitors scrolling green text, each with a black hoodie-wearing writer furiously documenting the black arts of hacking. OpenIDEO, the “open innovation practice” of global design company IDEO, has issued a challenge to “reimagine a more compelling and relatable visual language for cybersecurity.” In other words, no more scrolling random code and no more hoodies. Do you have kinder, gentler visual metaphors for cybersecurity? You might win some pretty decent prizes for your effort to “represent different terms and ideas in the cybersecurity space in an accessible and compelling way.”

Hoverboard Circles Bastille Day

According to reports, a turbine-powered flying board buzzed around Bastille Day celebrations carrying its inventor [Franky Zapata] toting a rifle to promote the military applications of the Flyboard Air. You can see the video record, below.

We’ve heard the board costs a cool $250,000 so you may want to start saving now. There are several versions including one that qualifies in the United States as an ultralight. The board Zapata used can reach speeds of 190 km/h and can run for up to 10 minutes, although the website claims 200 km/h is possible and the company also claims to routinely reach 140 km/h. and 6 minute flight times.

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Turning That Old Hoverboard Into A Learning Platform

[Isabelle Simova] is building Hoverbot, a flexible robotics platform using Ikea plastic trays, JavaScript running on a Raspberry Pi and parts scavenged from commonly available hoverboards.

Self-balancing scooters a.k.a. Hoverboards are a great source of parts for such a project. Their high torque, direct drive brushless motors can drive loads of 100 kg or more. In addition, you also get a matching motor controller board, a rechargeable battery and its charging circuit. Most hoverboard controllers use the STM32F103, so flashing them with your own firmware becomes easy using a ST-link V2 programmer.

The next set of parts you need to build your robot is sensors. Some are cheap and easily available, such as microphones, contact switches or LDRs, while others such as ultrasonic distance sensors or LiDAR’s may cost a lot more. One source of cheap sensors are car parking assist transducers. An aftermarket parking sensor kit usually consists of four transducers, a control box, cables and display. Using a logic analyzer, [Isabelle] shows how you can poke around the output port of the control box to reverse engineer the data stream and decipher the sensor data. Once the data structure is decoded, you can then use some SPI bit-banging and voltage translation to interface it with the Raspberry Pi. Using the Pi makes it easy to add a cheap web camera, microphone and speakers to the Hoverbot.

Ikea is a hackers favourite, and offers a wide variety of hacker friendly devices and supplies. Their catalog offers a wide selection of fine, Swedish engineered products which can be used as enclosures for building robots. [Isabelle] zeroed in on a deep, circular plastic tray from a storage table set, stiffened with some plywood reinforcement. The tray offers ample space to mount the two motors, two castor wheels, battery and the rest of the electronics. Most of the original hardware from the hoverboard comes handy while putting it all together.

The software glue that holds all this together is JavaScript. The event-driven architecture of Node.js makes it a very suitable framework to use for Hoverbot. [Isabelle] has built a basic application allowing remote control of the robot. It includes a dashboard which shows live video and audio streams from the robot, buttons for movement control, an input box for converting text to speech, ultrasonic sensor visualization, LED lighting control, message log and status display for the motors. This makes the dashboard a useful debugging tool and a starting point for building more interesting applications. Check the build log for all the juicy details. Which other products from the Ikea catalog can be used to build the Hoverbot? How about a robotic Chair?

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Step The Halbach From My Magnets

[Klaus Halbach] gets his name attached to these clever arrangements of permanent magnets but the effect was discovered by [John C. Mallinson]. Mallinson array sounds good too, but what’s in a name? A Halbach array consists of permanent magnets with their poles rotated relative to each other. Depending on how they’re rotated, you can create some useful patterns in the overall magnetic field.

Over at the K&J Magnetics blog, they dig into the effects and power of these arrays in the linear form and the circular form. The Halbach effect may not be a common topic over dinner, but the arrays are appearing in some of the best tech including maglev trains, hoverboards (that don’t ride on rubber wheels), and the particle accelerators they were designed for.

Once aligned, these arrays sculpt a magnetic field. The field can be one-sided, neutralized at one point, and metal filings are used to demonstrate the shape of these fields in a quick video. In the video after the break, a powerful magnetic field is built but when a rare earth magnet is placed in the center, rather than blasting into one of the nearby magnets, it wobbles lazily.

Be careful when working with powerful magnets, they can pinch and crush, but go ahead and build your own levitating flyer or if you came for hoverboards, check out this hoverboard built with gardening tools.


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Here’s Why Hoverboard Motors Might Belong In Robots

[madcowswe] starts by pointing out that the entire premise of ODrive (an open-source brushless motor driver board) is to make use of inexpensive brushless motors in industrial-type applications. This usually means using hobby electric aircraft motors, but robotic applications sometimes need more torque than those motors can provide. Adding a gearbox is one option, but there is another: so-called “hoverboard” motors are common and offer a frankly outstanding torque-to-price ratio.

A teardown showed that the necessary mechanical and electrical interfacing look to be worth a try, so prototyping has begun. These motors are really designed for spinning a tire on the ground instead of driving other loads, but [madcowswe] believes that by adding an encoder and the right fixtures, these motors could form the basis of an excellent robot arm. The ODrive project was a contender for the 2016 Hackaday Prize and we can’t wait to see where this ends up.

Boxes, Form An Orderly Queue Behind The Armchair!

If you have ever been to a hacker camp, you’ll know the problem of transporting all your stuff to your hackerspace village, or to wherever you’ll be basing yourself for the duration. The car park is always too far away, whatever trolley you’ve brought along is never big enough, and the terrain you have to drag everything over feels more like the Chilkoot Trail than a city sidewalk.

[Jan Henrik] and [Niklas Fauth] have an effective solution to all your hacker camp transport woes, in the form of a motorized platform designed to carry a storage box. Underneath the platform are a pair of hoverboard motors and their controller board reflashed with a custom firmware.

You might be now looking at it and thinking “So what?”, for a single platform is handy but hardly a comprehensive transport solution. What makes this one impressive though is that it’s not a single board, instead there is a swarm of them for which they appear to have implemented some form of optical following system which is teased through the video we’ve placed below the break and with this Tweet, but not in detail yet in the wiki page. A neat train of platforms follows the lead one, transporting everything with minimum fuss. What can we say, except “We want one too!”. There is some code to be found in a GitHub repository, should you be interested in having a go for yourself.

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