Build A ROBONOVA-I


On the latest episode of Systm, they talk to [David Calkins], founder of the RoboGames competition, about humanoid robotics. The robots featured in the episode are Hitec’s ROBONOVA-I. The ROBONOVA is about a foot high and has 16 servos with support for up to 24, all connected to an Atmel controller. The episode is quite long: At around 15 minutes, they demonstrate the programming enviroment. You can program it traditionally or pose the bot to work out the motions. At 30 minutes, [David] mentions that next year’s competition will allow airsoft weapons to be attached, but bots have to be controlled from a first person perspective. If you’re interested in one of these kits, they have a ROBONOVA special of $900 or as low as $500 for educational institutions (that’s us, right?). Now is the perfect time to get one since you’ll have nearly a full year to prepare for RoboGames.

Related: You’ll hear builder [Matt Bauer]’s name mentioned several times.

[via BotJunkie]

Fun With Radiohead’s Data From ‘House Of Cards’

Radiohead recently released the 3D data that was used to create the video for their song ‘House of Cards‘. [Micheal_z] sent in some of the results of his groups playtime with the data. The first effort involved some data translation. Then they created an atomizer of the head and put it up on their ungodly huge 8160×4000 pixel multi-touch display.

The video below was created by tracking the background image to orient and overlay the projection.

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Machine Embroidered LED Matrix


Our favorite electric textiles expert, [Leah Buechley], put together this machine embroidered LED matrix proof of concept. For the vertical rows, the top thread is conductive, while the thread on the underside (the bobbin) is not. For the horizontal rows, the the thread is swapped and the fabric acts as an insulator between the two layers of wiring. You can see a small brown bunch of thread next to each LED: this is the via to wiring on the backside of the fabric. The matrix is being controlled by a LilyPad Arduino. This is an interesting idea and has the potential to make prototyping wearable projects much faster. Here are two more pictures of the project.

Radiohead Releases Laser Music Video With Data


Radiohead has released their music video for “House Of Cards.” We’ve already covered some of the tech involved. If making an entire video without cameras wasn’t edgy enough, they’ve released all the point data for people to play with and remix. The band is encouraging people to post their creations to their YouTube group.

Head over to their Google Code page to watch a making of video as well as view some of the datasets in 3D. There is a link to the entire dataset for download as well.

Subwoofer Makes Cornstarch Dance


People tend not to think about the non-Newtonian properties of foodstuffs, but we’re glad at least one person did. When it comes to cornstarch, it’s indeterminate viscosity when mixed with water made it the perfect solution for a pretty neat trick: making a liquid move in reaction to a subwoofer. The unique motion can be attributed to the physical properties of the solution: when enough force is applied quickly, it acts as a solid. Otherwise, it flows like a liquid. The erratic bouncing of the sound waves combined with a little tactile manipulation create varying degrees and speeds of applied pressure, which in turn create a mass of flowing shapes that almost appear to be alive.

We’ve covered weird fluids before, but this is perhaps most similar to SnOil, a game that uses ferrofluids to achieve a similar result. SnOil, however, does not depend of vibrations to create shapes in the fluid, it uses small electromagnets and magnetically charges liquid instead. We love the ordered appearance of the SnOil unit, but the chaotic motion of the cornstarch and it’s non-Newtonian properties make it appear almost otherworldly. We wonder how ferrofluids would react in a situation similar to the cornstarch above, since it would respond to both the vibration and the voice coil’s magnetic field.

[via Neatorama]

Tangible Sequencer Interface With Skittles


Using a webcam, some cardboard, and a bag of Skittles, [Kyle McDonald] created this tangible interface for a beat sequencer. The Skittles are dropped onto the rows which correspond to a drum channel and each Skittle represents an 1/8th note. For such cheap components, the system seems to recognize the sequences pretty quick. This is probably due to some clever programming with the processing back-end. He claims his inspiration was the BallBearing sequencer, which uses the ball bearings as contact switches to determine the sequence rather than having a webcam analyze the surface.

It would be really nice to see this project expanded into a full blown instrument. the webcam could allow for dynamic surfaces and he could certainly add more control to the system with some knobs and/or sliders. He claims these features, and the source, will soon arrive.

Magnetic Movie


Magnetic field lines may be invisible to the naked eye, but they behave in ways that would amaze us if only we could see them. [Ruth Jarman] and [Joe Gerhardt] from Semiconductor wanted to make them visible for everyone, so they produced Magnetic Movie, a film that combines animations, theoretical models, and actual VLF recordings of the entire Earth’s magetic forces to create a film that shows magnetic fields moving and jumping through the air in living color.

The film is part art project and part scientific experiment, but we can enjoy it on both levels, as watching the path and motion of magnetic field lines is both beautiful and informative. Get a glimpse for yourself after the break.

Continue reading “Magnetic Movie”