Archive for the ‘electronics’ Category

3d printer finished

Wednesday, March 3rd, 2010

More details soon.

3-d printer nearing completion

Friday, February 19th, 2010

Andrew2.0 and I have been working on building our own RepStrap for the last three or four weekends, and last night we had a very successful first run (without the extruder installed). Above, you can see a video of it in action. (Thanks for the FlipHD, Dad!). We made some initial measurements of its alignment and were pleasantly surprised to find that the X and Y axes are just about perfectly square to each other, and even with our hardware-store threaded rod we seem to be getting accuracy to about 0.02mm(!)

We’re assembling and mounting the extruder head tonight, so by early next week we should be printing in ABS for real. It’s pretty addictive building these, partially because it’s awesome to build something that is so much more accurate than a person can be.

Steak Filter v0

Saturday, November 21st, 2009

While I was working on House In Bali in Berkeley, I had the thought that it would be a good idea to run some video signal through a steak. It was mostly the drawing I had made of the signal flow, and the name (“Steak Filter”) that I thought were so simple and adorably right. I am hard to dissuade when I insist something is right, even if I am clearly wrong; you might already know this. I got excited about it, and ended up not talking about much else for a day or so. I think I was pretty insufferable about it being a good thing to try.

Just last week, I finally got it together enough to just do a dry run, and I’m glad I did—somehow I never remember how easy it is to just throw something together, or how little I ever regret spending an hour or an evening to throw together a little test that will leave me with some digital or physical records to work with.

I meant to tell you about this sooner, because I liked the result. The actual mechanics of the filter worked really well, better than I thought, and it made for a nice contemplative couple hours, watching the steak (it was a roast, actually) cooking. Almost as soon as I put it up on Vimeo, I got an email from an editor at a food blog called “Eat Me Daily.” Not, if you ask me, a great name for a blog, but they had some cool work there. Raphael, the editor, asked me “exactly what’s going on here.”

This was exciting, because it was a chance to put an actual artwork into the world with a statement accompanying it. I’m glad I thought a bit ahead, though, and asked him to hold off publishing for a day or so while I got my website updated and generally cleaned house and prepared for visitors. Using Google Wave, Harlo and I co-edited the text of the statement and sent it off. Here’s the statement:

Hi Raphael, thanks for your patience – there’s now a (hopefully) more coherent web representation of the project online.

I think the >init< video is perhaps the most explanatory: http://vimeo.com/7491585 , although the green-and-red video you referenced does look a little nicer (both are from the same performance event). Quite literally, I am plugging composite video into a big steak, which is then cooked. The video signal going through the steak is the image of the steak cooking. Gradually, the steak loses moisture and signal can no longer pass.

With this performance I'm trying to get at the reflexivity of live video - the taut line between the space and the image that results. It's possible to think of almost anything that mediates as a filter of some kind...sort of a "the-map-is-not-the-territory" territory.

In this system, the filtered image is recursively processed in a feedback loop, allowing minute perturbations to ripple and echo across the screen long after the original impulse has ended.

Part of my interest in video lies in its exploded body; the signal is a ghost that resonates and deforms, trapped in our waveguides: when the system powers down the image fades into incoherence, leaving no corpse behind. Steak Filter gives body to this infinite recursion, making it real; incarnate. With this corporeality comes mortality: as the meat sputters and pops, we watch the cascade of images until finally, the steak is done.

This piece was a study for a performance series I might be doing at the Harvard Museum of Natural History this spring. I'd love to hear any thought/feedback/reactions, etc you might have - thanks!

After I sent that off, Raphael wrote back with some questions, which I’ll post verbatim:

Hi Raphael, thanks for your questions! I’ll do my best to answer these well but please feel free to push me for clarification or more details…

    You write “the signal is a ghost” — is part of what you’re capturing the last remaining life of the animal, right before its consumption? Its “last gasp” so to speak. Is the meat itself a ghost?

It’s not particularly about the life/soul of the animal – meat is meat. For me, the ghost I mention is the fissure between the physical and virtual realms involved in the performance – a real space is abstracted, ghosted, into a temporal phenomenon (the video signal) that we see as a series of transient images onscreen. There’s no way to “catch” this live signal, but you can see its traces.

    Was there a reason to use beef over other meats?

It was very important for this project not to be wasteful, both out of respect for the medium and due to financial limitations – I asked a couple butchers for spoiled/unwanted steaks, but nobody would provide any. Often, a title is one of the first elements I’ll start with when making a piece, and “Steak Filter” has a compelling ring to it. Also, I don’t really eat pork, and I was worried chicken or fish would not present an easily-readable image onscreen.


    How will your upcoming performance series incorporate this study?

I’m not entirely sure yet, but I will probably be doing this performance, cooking a steak filter, while the audience explores the rest of the works on display. The smell, and the amplified sound of the sputtering of the meat, will provide an interesting ambient counterpoint to the museum’s usual fare of sterile, long-dead, never-changing objects. (There is no sound in some of the videos this time because I did not have the proper mic setup)

    How did it taste?

It was delicious. I might experiment with different marinades, though, to see their effect on the image and palette. There is something special, though, to the simplicity of the current setup.

    Have you worked with food before?

I have done a few poorly-documented projects in the past, like signing my name using a pen that dispenses a rapidly-solidifying “gummi” mix. I am working on a piece now that involves custom-molded chocolate circuitry, although it is too soon to tell if that idea will bear
fruit.

    also, please confirm: the official name of the piece is “Steak Filter v0″ and should be credited to Noah Feehan / AKA MEDIA SYSTEM

Thanks for asking! This is version 0 of the “Steak Filter” series, so “Steak Filter (v0)” or “Steak Filter, v0″ would be fine. I’m Noah
Feehan / AKA. AKA MEDIA SYSTEM is a term I use to include any collaborators and/or participants, but this piece is pretty much solo.

I just couldn’t be more pleased with Raphael’s write-up here. I was a little worried when I saw the “is this about the animal’s soul” part, as it looked a little like a leading question, but it turned out fine—I think that by providing a strong set of responses and a clearly-written statement, it became easier to tell my story than to do the usual conjecture/opinion that often accompanies reblogged web art.

Raphael’s piece really took off after a few hours, which was super-exciting. First it was on kottke, then Gizmodo, then Lady Ada’s blog, then Today and Tomorrow. Overall, I got 14400 views in about 3 days. And this was a test shot, done on Friday night, more or less because I had nothing better to do.

The thing I learned is, this is the better thing that I have to do. The more I spend a couple hours doing a lil thing like this, or making Mylar Mountains, or making little chocolate circuitboards, the more something good is likely to happen.

Artist talk: Jessica Rylan

Thursday, September 18th, 2008

I saw Jessica Rylan’s talk at the MIT Center for Advanced Visual Studies a few months ago, and it was an interesting experience. It’s been awhile since I went to one of these things, and I think my break has given me a bit of healthy perspective. Here are some things I wrote down or thought about during the talk—per usual, my mind wanders during events of this nature.

Jessica’s talk had some very interesting AV components. At one point, she played a great series of audio samples with accompanying waveplots. I was a little underwhelmed by her engagement with the technical side of her work—maybe she was nervous, but it seemed at times as though she was deliberately trying to sound “technical,” something that makes me immediately suspicious.

Much of Jessica’s talk was about the change in technology from the 1960’s to the present: transistors are smaller, memory is bigger, and the like. It didn’t relate much to anything else, except that it was an interest of hers, which I suppose we did all show up to listen to…at a couple points she used the strange example of cars to compare to the progress that computers have made: cars still do the same thing, cost about the same, run on gas, etc. More than a few people in the (mostly MIT-student) audience looked as confused as I that we were making this comparison.

I’m aware that I’m not saying much that’s positive about Jessica, even though I admire what she’s doing and how she got here. I’m a little puzzled myself as to why I’m dwelling on the negative aspects, and I think the distinction is dawning on me: Jessica Rylan is a good maker of things, and is firmly interested in the dialog surrounding her work. She has a rich relationship to the equipment she uses and the sound she makes (her website is very well-spoken), and is admirably open and involved in helping others have the same experience. Of course, the other side of all of this is that I really don’t care for her actual music—it appears as though she has taken to describing herself as a “noise band” because of the current cachet surrounding this genre, since her music rarely shares the qualities of other groups in that genre.

Altogether, the presentation didn’t go very well. Ms. Rylan’s prepared notes weren’t thorough or focused, and her remarks didn’t really get at the ideas behind her process and her music. Perhaps the entire audience would have been better served if he had made a clear decision either to discuss her artistic intent and motivation or to delve into the technical aspects of her hardware fabrication and setup, rather than paying lip-service to both. I’ve seen from this talk how someone who is otherwise in control of her direction and practice can make the mistake of showing work that is either poorly contextualized or, worse, attempting to capitalize on an audience’s lack of understanding rather than add to such an understanding.

I’ve held off on releasing this post for several months for a couple of reasons, and I’m glad to revisit it, especially since the project I’m working on now has put me in much the same situation: several times in the recent past, I’ve been compelled to “tech it up” when discussing my project with sponsors, press, or visitors. It’s amazing the kind of hyperbolic bullshit one can concoct when watching a sponsor’s interest in your professor’s opera flag before your eyes.

However, these experiences have only strengthened my resolve to be more open when discussing my own work, which hopefully will be soon (Sponsor Week is at the end of October, and I expect to have one or two projects of my own ready to show by then).

A nice break

Tuesday, January 22nd, 2008

In the last month I’ve gotten quite a bit done, and I have more on the horizon. It is a relief to have my time spoken for these days, and a delight that such exciting projects are on the roster. I will attempt to be brief.

The application
The application is in, and all necessary evaluators have responded. Hopefully, my application is as good as anyone else’s at this point. I am satisfied with my submission, and glad that it is out of my hands.

The Cameroon project
Delightfully, I met Andrew Sempere again recently and he has offered some insight on the chip problem I am having—the one I’m working with is proving difficult to debug. I’ve been working with Harlo on using this power source and looking at other chips that more easily facilitate pitchshifting. I’m considering just gutting this helmet and using it for a cheap pitchshift effect (I assume it can be hacked to change pitches).

The Syncwalk Digital Composition Interface
I’m chomping at the bit to get to the hardware/software part of this but I have committed to do the Cameroon project first. It’s nice, though, to continue to try to refine the operational flow as a background task while walking. I have a pretty complete model in mind now, and it can be implemented in several stages, which will help focus development work along the way.

South Africa Documentary
I’m heading down to New York to finalize the scored parts of Thenji Nkosi’s documentary at the end of the month—there’s also a new song called “Primary Loyalty” that you can hear here:
Primary Loyalty

Screen printing
Harlo and started screen printing this past weekend and had some modest successes.

A Bell
I received a very lovely bell for Christmas and it makes a wonderful sound. I will link to it soon.

O VHS!

Monday, December 10th, 2007

I finally, finally found the VHS of an old performance I did with Teresa Marrin Nakra last week, and have now safely converted it to a .mov.

The music itself isn’t the most awesome thing in the world, but I certainly am glad that proof of this exists…I really need something from this to put in my portfolio! As I try to write more thoughtfully about this project, it becomes clearer how much this served as an introduction to the world of physical computing and, in a sense, the process involved in working with emerging technology.

The carpet itself was very cool but a bit buggy. Factors like heat and prior use would seriously impact the consistency of the output, and it led to some frustrating but now-familiar debugging issues. Other things, like Teresa’s imminent pregnancy and my own unfamiliarity with the medium made this a frustrating project at the time. Thankfully, Tim Ledlie was around to handle the software side of the debugging and help me retain a sense of perspective.

We only had a week from start to finish to make our performances, and the title of mine (DON’T WORRY ABOUT ME, I’LL BE FINE) comes from the sampleset I was using at the time. Snips from Disney’s version of “Peter and the Wolf” and R+H’s “South Pacific” combined with pretty abstract (and, upon later reflection, boring) drum and toneloops to make an endless, atmospheric performance that did not go very many places.

I think the best thing about this project was finally getting to just play the damn carpet. I spent many, many hypercaffeinated hours before that night pressing on the thing and listening for trouble, and even watching it reminds me of what fun it was to make sounds with something so malleable and strange.

SORRY I’M LATE I WAS BLOGGING

Monday, November 26th, 2007

I’m supposed to be somewhere right now but I’m posting this first—let me know what you think. It is, like most things these days, a rough unmastered/edited quickie recording done while working on “the woods”, a composition environment I’m working on in Max.
I’LL BE LATE

A much-needed respite, an overdue update

Monday, November 12th, 2007

Friend, I have been absent due to a disgusting illness.

Nowdays I’m working on the following:

  • Cameroon Project—yesterday Harlo and I picked up some inexpensive crank-based power supplies from Ocean State Job Lot. Next step is dissecting them and seeing what can be modded to work with the toy. Last week while wheezing and expelling, I mocked up the voice chip’s demo circuit on a breadboard but had a strange problem: I can’t seem to make the mic work. When I press play I can hear that I’ve recorded the noise naturally made by the pins floating, but somewhere in the recording process the signal is either being lost or never being generated at all. Anyone had any experience with this chip? Google yields some good applications and examples but no users have had this issue (makes me think I’m really fucking something simple up here).
  • South Africa—Dear one, have I even told you about this? Or am I keeping you in the dark? My apologies!
    This project involves taking some samples of native South African instruments recorded by my friend Thenji (part of Curious AV) and muxing them into something usable for the score of her upcoming film. So far I’ve been in the cut-and-experiment phase of the project, but I’ve committed to have three or so working models of songs by December first. Here’s the first go at a tune, made with Ableton:
    Kalimba(draft)
    I’m taking this as an opportunity to further flesh out my max/msp interface, the woods, and add some useful features it’s been missing. It wouldn’t be fair to harp on about my own interface without crediting Keith Fullerton Whitman, whose presentation of his “H Mod” interface in 2003 at a Harvard Aritst Workshop was truly inspiring. You really should go give some time to the rest of his site (and, it goes without saying, his music). He is a good man, and he has a good brain. The wonderful part of this interface is that the main images on his screen (the four groovemodule waveforms in rad colors) are literally parts of his RAM – the mapping is that direct, and it allows you to easily see what’s interacting with what, what’s going to make your machine hang, etc. I’m not the fan of external VST modules that Keith is, but I can’t dispute the man’s sound, and that sound is gorgeous.
  • Grad School App—Well, shit. I’ve secured vacation time to get my online portfolio super-ready, I’ve tried to make friends with some of the awesome people in the Hyperinstrument group (although no luck getting a meeting with Tod, the Leader), but damn it if the professors I had hoped would write my recommendations are un-reachable. Jef Huang, my awesome Physical Computing prof, has always been a bit difficult to get in touch with, but I was really hoping I’d be able to secure something, anything from him. It’s truly unfortunate but in some ways telling that the professors I admired the most were destined never to become full-time Harvard staff; Jef’s in Switzerland at an institution that seems to have a far better handle on what new art is, Peggy Phelan is in sunny Stanford, and Elisabeth Subrin is working all along the East Coast. Dammit!
  • FLORA MORTIS – OPENING NIGHT

    Wednesday, October 31st, 2007



    DORKBOT HALLOWEEN07

    Originally uploaded by AKA MEDIA SYSTEM

    The opening tonight went well—many thanks to all who attended!

    Pictured here is the final product. I think the form turned out well, and I certainly learned many lessons in different media. The flower initially deployed flawlessly and worked for over an hour with no intervention from me. I’ll detail in a later update the means by which I ensured that the auto-destruct feature of previous flower incarnations was successfully deprecated.

    After I had been away from the flower for awhile, I came back and noticed it was stuck in the “on” position—not good for anyone! After twenty minutes of frustrating, in-public debugging I discovered that the 9v battery had more or less drained completely; tomorrow I’ll need to deliver a 9v AC power supply, and perhaps once I post the schematic and/or breadboard photos someone can point out the error in my circuit that causes the excessive drain.

    Watching strangers interact with the flower was pretty enlightening. I certainly regret that I had to compromise on the original interaction design in order to complete the schematic on time. In the final hours of Googling for an answer (peep my del.icio.us to see the link density/time relationship change as we approach opening night) I realized I should have had the circuit ready way sooner than the physical proto…so now I know.

    One significant upside to this project is that it’s eliminated the inertia that I felt was keeping me from making acceptable progress on the Cameroon project. The flower circuit is my first foray from hardware hacking into the realm of microcontroller/logic projects, and I feel much more comfortable delving into a non-555 project with this under my belt.

    Late night update

    Sunday, October 28th, 2007

    Well, the flower project hit a snag when the dragon skin I molded turned out to be too thick for the muscle wire to move—in the course of figuring this out, I think I may have damaged/overheated some of the wire segments.

    Most of the wire is undamaged, though, and it was easy to retrieve the other wires from the silicone.

    Now I’m using a much thinner and lighter strategy involving a plastic flower I got at a craft shop. The downside here is that now I’ve got a shot at making a flower that magically sets itself on fire.

    My new form factor also means there’s no inbuilt means to force the wire back into a bent position when it’s unactuated – I’ll have to work out something there once the silicone has cured. It won’t be pretty.

    The other bad part: so far, I have not got a circuit working – I initially ordered too few/the wrong parts. Now I’m using a relay from an old robotics project of my brother’s, but I’m concerned about the current drawn by each wire—to get them to react quickly you have to really juice them up, and I doubt my relay can handle the current drawn by 6 of these, not to mention where I’ll find a power source for all this.

    The circuit I’ll worry about tomorrow. Tonight I’m not sleeping until I’m confident at least the form factor is correct and workable.