3D Printer Turned into Air Hockey Robot: It Prints, It Scores!

A few years ago we found out about mighty Roombas that were moonlighting as sumo wrestlers. Jose Julio’s RepRap 3D printer also has a sporting spirit. The robotics enthusiast unlocked his gadget’s potential and turned it into an air hockey player.

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The robot has three motors: two for moving its mallet across the y-axis and one for movement along the x-axis. Jose Julio wrote the drivers for the motors in Arduino. He then color-coded the mallet and the puck, installed a PlayStation Eye camera and wrote a program in C to make his robot see. Finally he wrote another Arduino program that predicts where the puck will go so that its motors can react appropriately.

Another neat thing about Jose Julio’s setup is that the table uses two old PC fans to create a cushion for the puck to slide on.

Jose Julio knows that his robot still needs a lot of practice – and programming – before it’s ready for primetime. For instance, it doesn’t know where the goal is, though as you saw in the video it can already score even with that handicap. But Jose Julio says he can easily imagine RepRap enthusiasts making air hockey robots of their own, improving and refining its programming so that robots could have different difficulty levels and even different strategies.

Insert a token in your browser and head to Jose Julio’s blog for more on his project.

[via The Next Web]

Ototo Musical Invention Kit Scales with Your Imagination

It may not look like much, but Dentaku’s tiny board lets you follow in the footsteps of Leo Fender, Antonio Stradivari, Ikutaro Kakehashi and other musical instrument makers. It’s called the Ototo, and it’s a small synthesizer that can be activated by any conductive material and tweaked by a variety of inputs.

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The Ototo is a lot like the MaKey MaKey, except it specializes in making music. It has 12 capacitive touch keys that you can activate with your fingers or any other conductive material. It also has four inputs for its sensors. One input modifies the volume, one changes the pitch and the other two sensors tweak the “texture” of the synth. At launch, Dentaku will offer seven types of sensors. There’s a knob, a slider, a joystick, a force-sensitive button, a touch-sensitive strip, a light sensor and a breath sensor.

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Augmenting the synth with one or more sensors lets you make a variety of instruments, from a cardboard saxophone to a drum made of human heads. I mean live human heads. I mean living human drums. With their heads still attached – you know what I mean. Don’t kill people.

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Ototo is powered by two AA batteries or via micro-USB. Speaking of which, you can also use the synthesizer as a MIDI controller over USB.

Jam with your browser and head to Kickstarter for more info on Ototo. A pledge of at least £45 (~$73 USD) gets you an Ototo board.

Wall-E Toy Robot Mod Adds Voice Recognition & Proximity Sensors

Adriá García of DIYMakers augmented a Wall-E toy by making it work with voice commands and giving it the means to move on its own and avoid obstacles. It doesn’t compact garbage or collect curios, but at least it can dance.

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Adriá used an Arduino Uno as Wall-E’s new brain. Two infrared proximity sensors help the toy detect obstacles, actuators move its arms and head and two continuous servo motors power its tracks. Adriá used the EasyVR module for voice recognition.

AUTO, navigate to DIYMakers for more details on Adriá’s mod.

[via BonjourLife]

Street-legal Cozy Coupe Doesn’t Look too Cozy

When my son was really small I probably pushed him 1000 miles in his red and yellow Little Tykes Cozy Coupe. I also flopped over the top of that little car a few times when the front wheels randomly stopped working at speed. If you have fond memories of these little toy cars, you might want to check out the street-legal version you can ride in now that you are grown up.

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The car was made by a guy named John Bitmead. The builder says that he spent 1000 hours and about £4,000 (~$6m500 USD) on the project. The car started out as a Daewoo Matiz, has an 800cc engine inside of it and is street legal. It has a top speed of 70mph.

I don’t see how this thing can actually be street legal. I wouldn’t want to be in an accident in this thing, even though it has airbags. Check out the videos to see the car in action.

[via Daily Mail and Geekologie]

Settlers of Catan Globe: Catanosphere

Instructables settler PenfoldPlant traded Settlers of Catan’s flat board game for a globe. A modified truncated icosahedron, to be exact. The result is a multipurpose piece that can serve as decoration, a container for game pieces and yes, a playing surface, albeit one that’s not as convenient as the original.

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PenfoldPlant calls his creation the Catanosphere. If it looks like a lot of work, that’s because it is. You’ll need lots of glue, nearly 500 small magnets and a steady hand for this project.

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Also, as you may have noticed some of the Catanosphere’s spaces for the tiles are pentagonal, but the game’s tiles are all hexagonal. So you’ll have to make or print pentagon-shaped copies of the tiles as well.

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The globe’s shape and the presence of pentagonal tiles also affect the game somewhat, though PenfoldPlant believes that you can still play with the exact same rules as the original.

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Colonize Instructables to for his detailed instructions and notes on the Catanosphere.

Arcade Machine Accepts Bitcoins: Bitcoin-op

A growing number of establishments are accepting Bitcoin as payment. Now you can even use it to play arcade games. British company Liberty Games combined the cutting edge currency with the aging gaming platform to make a simple transaction hilariously complicated. The company used a Raspberry Pi and a PiFace add-on to make the payment interface.

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Liberty Games first tried their Bitcoin payment mod on a pool table. After receiving good feedback for that mod, the company decided to apply it on an arcade machine.

The great thing about their method is that it doesn’t mess with the machine’s software, which means it can be performed on pretty much any coin-operated arcade game. Not that you should.

[via Gamefreaks]

Guy Plays Tekken Using an Electric Piano

If you have ever wanted to incorporate a musical instrument into games other than Rock Band, Rocksmith or Guitar Hero, this guy is your new best friend. Vimeo member Mc Cool is seen here in this video using a modded electric piano as a controller to play Tekken.
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In this game, you get to kick ass and create your own theme music at the same time. If Schwarzenegger and Stallone could do that, we would have some really strange action movie soundtracks. While you ponder that, check out the video below:

[via Geekologie]

Making Prototypes with a 3D Printer & LEGO: faBrickation

3D printing can help you create prototypes or mockups quickly. Or should I say relatively quickly – it can take a 3D printer hours to print even moderately-sized objects. To speed things up, students from the Human-Computer Interaction Group at the Hasso Plattner Institute tested adding LEGO to their workflow.

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Researchers Stefanie Mueller, Tobias Mohr, Kerstin Guenther, Johannes Frohnhofen and Patrick Baudisch call their project faBrickation. The idea is to print just the crucial parts of a prototype, then build the rest out of LEGO. To do that, they wrote a program called faBrickator, where they can open 3D models…

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…and “Legofy” it at the press of a button.

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Then they just mark the parts of the model that will be printed…

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…and build the rest with LEGO using instructions generated by faBrickator.

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They can also use faBrickator to go back to a 3D model, modify it and then print only the parts that were changed, once again saving time.

The group claims that on average, faBrickation lets them make prototypes nearly two and a half times faster than using 3D printing alone. I wonder if they can make a reverse faBrickation scanner, so laypeople can start making a “3d model” out of LEGO instead of a modeling software, scan that LEGO model then run the resulting model through faBrickation.

[via Hasso Plattner Institute via PSFK]

Vectorscope Clock Mod: from Chroma to Chronon

Oscilloclock shop owner Aaron’s latest offering is based on a vectorscope, a special kind of oscilloscope used to analyze the quality of television or video signals. Like its brethren, the digital age has reduced the need for vectorscopes, but Aaron can make them useful again as clocks.

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Like his other oscilloclocks – one of which we featured last year – the VectorClock uses Aaron’s custom controller board, which draws shapes on the screen by drawing circles, with certain parts of the CRT screen blanked out depending on the desired shape or character. Aaron is proud of this particular build, which is based on a Tektronix 520A vectorscope, because he was able to use nearly all of its exisiting circuits, thus minimizing internal modifications.

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As you’ll see in the demo video below, the VectorClock can display the time and date in a variety of ways. It also has dimmable lighting and can even display words.

It looks like something you’ll find at the Darkwaters General Store. Contact Aaron if you want him to build you a VectorClock. He probably doesn’t accept bottle caps as payment.

[via Hack A Day]

 

RumbleRail Floppy Disk Jukebox: Diskman 8.0

I’m sure you’ve seen videos of floppy disk drives rigged to play music. Simon Schoar took the hack to the next level with RumbleRail, a modular floppy jukebox that plays MIDI files loaded to its SD card slot. It’s run by an ATMega microcontroller, has a 128 x 64 LCD display and two RGB LEDs for each drive that light up in sync with the music. All of its parts are neatly arranged on a machined aluminum rail.

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According to Simon, depending on the file extension of the selected MIDI files, RumbleRail will either map MIDI tracks to the drives, map MIDI channels to the drives or just play as many notes as possible at once. Here’s the RumbleRail playing the Pirates of the Caribbean theme song:

And here it is playing the Ghostbusters theme song in the dark, because it ain’t afraid of no ghost:

They sound like highly organized mosquitoes. Fire up Lynx and head to Simon’s website to find out how you can build your own RumbleRail.

[via DamnGeeky]