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354 Articles

Autonomous Helicopter Learns Autorotation

August 12, 2008 by 10 Comments


Stanford’s autonomous helicopter group has made some impressive advancements in the field of autonomous helicopter control, including inverted hovering and performing aerobatic stunts. The group uses reinforcement learning to teach its control system various maneuvers and has been very successful in doing so. One of their latest achievements was teaching the bot the emergency landing technique autorotation. Autorotation is used when a helicopter’s engine fails or is disengaged and works by changing the collective pitch to use the airflow from descent to rotate the blades. The group has more flight demonstrations on their YouTube channel.

[via BotJunkie]

Free Parking Garage Access

August 10, 2008 by 21 Comments

This hack is an interesting twist that will allow you to get in or out of some parking garages when the attendant isn’t looking. Using something metal to trip the parking lot’s proximity sensor that is meant to let cars out automatically you can get into the garage or vice-versa without opening your wallet. A magnet from a hard drive might work a bit better because it is able to trip multiple types of sensors, but for this hack any kind of metal will work. This proximity sensor is a high–frequency oscillation type, so anything that attenuates, varies the frequency or stops the oscillation trips the sensor. When you can’t find a place to park, this hack will certainly impress your friends more than this method, but your street credibility could quickly turn into never lived down stories, if you end up driving over tire strips and ruining your tires, get a huge parking or trespassing ticket, or worse yet get your vehicle towed!

Make: Television

August 4, 2008 by 2 Comments

Make Magazine, famous for the Maker Faire, among other things, has announced a new project called Make: television. The show will be coming to public television stations throughout the USA starting early 2009. The big news is that you can submit 2 minute long videos of your projects to be included in the show’s Maker Channel segment. The bigger news is that if your video is selected, they’ll send you a $50 gift certificate from the Maker Shed and a free year of Make Magazine.

Red Bull Flugtag Portland

August 2, 2008 by 9 Comments


Off all the competitions for poorly performing human powered flying machines, the Red Bull Flugtag is one of our favorites. Honestly, it’s the only one we can think of, but that doesn’t mean we’re any less enthusiastic about giving flight to half baked ideas. Today was the Portland round of the international event. Teams have to submit an application for their craft in advance. The vehicle can have a maximum wingspan of 30 feet and a weight with pilot of 450 pounds or less. Power is from muscle or simply gravity. The vehicle also has to be easily retreivable so they can get it out of the water. Judging isn’t just for distance, but for creativity, too.

Flickr users [pdx-kate] and [Jabin] have uploaded images and video from the day: The winner was Team Yakima’s big wheel that flew 62 feet. Second place went to Greased Lightning at 55 feet. Third was the FreeBallin sneaker which you can see in flight here. The People’s Choice award went to the Space Balls Winnebago, which we unfortunately can’t find a very good picture of. You can read more about each individual entry on the results page.

Embedded below is the video of the current US record holder: a banjo that went 155 feet in Nashville. The next US event will be September 6th in Chicago.

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Exposing Poorly Redacted PDFs

August 1, 2008 by 19 Comments


Privacy watchdog group, National Legal and Policy Center has released a PDF detailing Google founder Larry Page’s home (dowload PDF here). They used Google’s Maps and Street View to assemble all of the information. Google is currently involved in a lawsuit resulting from a Street View vehicle traveling and documenting a private road. This PDF was released in response to Google stating that “complete privacy does not exist”.

For some reason the PDF is redacted with black boxes. We threw together a simple screencast (click through for HiDef) to show how to easily bypass the boxes using free tools. You can simply cut and paste the hidden text and images can be copied as well-no need to break out Illustrator. This sort of redaction may seem trivial, but the US military has fallen victim to it in the past.

HOPE 2008: YouTomb, A Free Culture Hack

July 25, 2008 by 9 Comments


YouTomb is a research project designed by the MIT Free Culture group to track video take downs on YouTube. To succeed, the team needed to track every single video on YouTube… which is close to impossible. Instead, they built several “explorer” scripts to track what videos were interesting. One explorer tracks all of YouTube’s lists: recommended, featured, most active, and more. Another explorer picks up every video submitted to YouTube, and a third crawls Technorati.

The explorers just find the videos; a separate group of scanner scripts checks the current status of videos. It checks both the new videos and ones that have been killed to see if they return. YouTomb archives every video it finds. They display the thumbnail of the video under fair use, but they’re still determining whether they can display each video in full.

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Drill Powered Mini Bike

July 24, 2008 by 25 Comments


DPX Systems seems to deal exclusively in devices powered by handheld drills. In addition to the mini bike in the video above, they’ve made systems for wheelchairs, toolboxes, and hoists. The device costs $630, but we know most of you just need prompting that something is possible to be well on your way to building your own version. We’re still more fond of weed whacker machines.

[via Toolmonger]