Retrotechtacular: Singing Bird Automata

August 6, 2013 by Mike Szczys 16 Comments

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Our cats were both sleeping near the computer and these videos were driving them nuts. To our ears these birdsongs sound pretty good. They didn’t trick the cats into stalking mode, but they did spark an audible complaint. So the predators aren’t drooling but the mechanical engineers reading this should be. These automata combine the precision of a mechanical clock with a bellows and specialized whistle to recreate birdsong.

You’ve got to hear it for yourself to appreciate the variety produced by the mechanisms. The first video shows off the device seen on the left. This particular model is from the 1890’s and the demo gives a good look at the arms that open and block a passageway to alter the sound. After seeing that link — which was sent in by [Stefan] — we started searching around for more info on the devices. The one pictured to the right turned up. It’s from YouTube user [Singing Bird Boxes] who has many videos showcasing these types of devices. We picked this one because he tried to explain how each part of the mechanism works. These are still being made today, but there’s something magical about seeing one built during the steam age.

We’d like to make Retrotechtacular a weekly feature every Tuesday. Help us out by sending in links to projects that highlight old technology, instructional videos of yore, tours of museums or similar relics.

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Have You Failed Hard Enough To Be On Hackaday?

August 5, 2013 by Mike Szczys 46 Comments

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There’s so much more to be discovered when your projects just don’t want to work. Grinding out the bugs, getting past roadblocks, and discovering gotchas is where real hacking know-how comes from. But most people aren’t motivated to document their failures. We want to change that.

We want to roll out a new weekly feature that showcases failure… well documented failure. But we need YOU to give up the goods. Write about your failed experience on your blog, post it to our project forums with [FAIL] in the title, or you can just write everything in an email and send it to us. Which ever way you choose, you’ll need to tip us off that you’d like to make it to the front page (come on, it’s not bragging since it didn’t even work!). If you already know of well documented project fails send in those links too even if they’re not your projects.

Make sure you include at least one descriptive image — snapshots, diagrams, schematics, screencaps, anything that tells the story is fair game. To show you what we’re after here’s a few of our favorite failed projects:

We’d like to point out that all of these projects are interesting ideas that show off missteps along the way. We will not be trashing on your skills as a hacker, but instead celebrating the lessons learned and hearlding the sharing of ideas from otherwise doomed projects.

Hackaday Links: Sunday, August 4th, 2013

August 4, 2013 by Mike Szczys 13 Comments

[Craig Turner] shows that simplicity can be surprisingly interesting. He connected up different colors of blinking LEDs in a grid. There’s no controller, but the startup voltage differences between colors make for some neat patterns with zero effort.

Remember the 3D printed gun? How about a 3D printed rifle! [Thanks Anonymous via Reason]

While we’re on the topic of 3D printing, here’s a design to straighten out your filament.

It takes four really big propellers to get an ostrich off the ground. This quadcopter’s a bit too feathery for us, but we still couldn’t stop laughing.

This Kinect sign language translator looks pretty amazing. It puts the Kinect on a motorized gimbal so that it can better follow the signer. We just had a bit of trouble with translation since the sound and text are both in Hebrew. This probably should have been a standalone feature otherwise.

Work smarter, not harder with this internal combustion wheelbarrow. [via Adafruit]

Ask Hackaday: Can You Steal A Car With A Mini Tesla Coil?

June 9, 2013 by Brian Benchoff 85 Comments

Last week we caught wind of a piece from the Today Show that shows very technically minded thieves stealing cars with a small device. Cops don’t know how they’re doing it, and of course the Today show (and the Hackaday comments) were full of speculation. The top three theories for how these thieves are unlocking car doors are jamming a keyless entry’s ‘lock signal’, a radio transmitter to send an ‘unlock’ code, or a small EMP device touched to the passenger side door to make it unlock.

That last theory – using a small EMP device to unlock a car’s door – got the attention of someone who builds mini EMP devices and has used them to get credits on slot machines. He emailed us under a condition of anonymity, but he says it’s highly unlikely a mini EMP device would be able to activate the solenoid on a car door.

This anonymous electromagnetic wizard would like to open up a challenge to Hackaday readers, though: demonstrate a miniature EMP device able to unlock an unmodified car door, and you’ll earn the respect of high voltage tinkerers the world over. If you’re successful you could always sell your device to a few criminal interests, but let’s keep things above board here.

Ask Hackaday: What Are We Going To Do With The New Kinect?

May 22, 2013 by Brian Benchoff 60 Comments

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Yesterday Microsoft announced their new cable box, the Xbox One. Included in the announcement is a vastly improved Kinect sensor. It won’t be available until next Christmas, but now the question is what are we going to do with it?

From what initial specs that can be found, the new version of the Kinect will output RGB 1080p video over a USB 3.0 connection to the new Xbox. The IR depth camera of the original Kinect has been replaced with a time of flight camera – a camera that is able to send out a pulse of light and time how long it takes for photons to be reflected back to the camera. While there have been some inroads into making low-cost ToF cameras – namely Intel and Creative’s Interactive Gesture Camera Development Kit and the $250 DepthSense 325 from SoftKinetic – the Kinect 2.0 will be the first time of flight camera you’ll be able to buy for a few hundred bucks at any Walmart.

We’ve seen a ton of awesome Kinect hacks over the years. Everything from a ‘holographic display’ that turns any TV into a 3D display, computer vision for robots, and a 3D scanner among others. A new Kinect sensor with better 3D resolution can only improve existing projects and the time of flight sensor – like the one found in Google’s driverless car – opens up the door for a whole bunch of new projects.

So, readers of Hackaday, assuming someone can write a driver in a few days like the Kinect 1.0, what are we going to do with it?

While we’re at it, keep in mind we made a call for Wii U controller hacks. If somebody can crack that nut, it’ll be an awesome remote for robots and FPV airplanes and drones.

The 10 Best Hacking Videos

April 25, 2013 by Caleb Kraft 41 Comments

Say goodbye to the rest of your day. Here are the top 10 best videos about real hacking. We’ve already covered the absolute worst that hollywood has to offer, twice. Then, we did the best that hollywood could pull off. Now we’re enjoying the real thing. Feast your eyes on hacking as it actually happens. In this list are all kinds of hacking, from slapping things together out of scrap to lock picking. From creating computers in your garage to social engineering.

Most of these are even available, in full, on youtube!

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What Are The Best Hacking Documentaries?

April 23, 2013 by Caleb Kraft 103 Comments

Continuing with our series of best and worst portrayals of hacking, we’re gathering our resources to bring you the top 10 Hacking Documentaries. Again, we feel the strongest resource is the hacking community, so lets hear what you think should qualify. While it would be fantastic to only have documentaries, if there is a hollywood movie that you feel fits, go ahead and let us know. If you’re up for a challenge, find us something dealing with hardware hacking instead of computers/phones!

Just for reference, here were the top 10 worst portrayals of hacking in movies as well as part 2. What you see above were the top 10 best, though admittedly I screwed up #4.