Posts Tagged ‘arduino’

afterimage – session 1 “a homage to la jetée”

Wednesday, February 24th, 2010

time and light are keyconcepts for our perception of the world we are living in. when we look at the stars in the nightly sky we seem them glooming bright and alive. but most of the stars we see have already died aeons ago. light, compared to the size of the universe, is slow and needs a long time to travel the far distances from the rims of the universe to our small solar system. what we see is an afterimage of the stars frozen into the firmament. when starring into a bright light source a similiar effect happens. our receptors in the eyes are lamed and cannot receive new input for a short time. so when facing the sun for a certain amount of time and then look away we can still see the bright disc dancing in front of our visual perception. it’s like going backwards into time.

not only light is slow, also our consciouness walks behind reality. when we decide to move an arm, take a step, form a word or just look at something, our subconscious awareness has already made this decision for us. therefore one can say that we live in an afterimage of our subconsciousness. what if anyone is aware of this afterimage, though perceiving the world through the channel of the subconsciousnes. he would be a timetraveller to his
surrounding being one step ahead of our time and space continuum.

the installation is placed in a completly dark room. at one wall a screen is attached that shows altered frames from the movie “La Jetée”, by Chris Marker from 1962. the pictures are not visual on the screen all the time, but flashed onto the retina of the observer. according to the pictures, dialogue lines taken
from the movie sound in the room. the installation tells its own story and though let the movie appear in a new form. because of the fact that the visual part appears different on the retina for every observer a personal interpretation of the story will be given for the visitor.

for more images look here

afterimage 3 – getting close

Wednesday, January 20th, 2010

after some fooling around with methods on how to get done with the technical realization of the project it’s now narrowed down. the installation will use the screen part of an 14” tft monitor, which makes it easy to apply the pictures directly from a pc. furthermore the tft has build in audio speakers which will be used for the sound.

to flash the pictures from the screen onto the retina i’ll be using a photoflash. for the flash to be executed at the right time i am using puredata, which will play the image sequence and sound and is also sending a trigger at the right time to a duemilanove arduino board with an 328 microcontroller chip, which is wired with the photoflash. the script on the arduino is short circuiting the flash to trigger it whenever i say so. by using an optoisolator i’ll be on the safe side not to overload my precious arduino board. thx to riblbem for this wonderfull tutorial!

using pd gives me two advantages. first i can sync the flash with the pictures pretty easy and second i can synchronise the sound to, but still leaving every component discrete though beeing possible to alter them afterwards.

as you can see the setup is pretty simple and so are the scripts, what’s now left to do is to build a decent frame for the tft screen and think about how to attach the flash to it. i also have to find a way how to spread the light of the flash over the whole screen, which maybe works by just putting a sheet of thin paper between the two, but that’s just testing. the tougher part will be now to write the storyline, but that will be the task for next week!

tarantella or i hear fibonacci when i sleep

Sunday, November 8th, 2009

in cooperation with andre wakko

fibo_03

a three steps project assignment by the name “power of 2″, was the starting point for the realization of this piece of work. first step was to produce 32 lines of program code in a language of our choice. by having a keen interest in chaotic and mathematical processes we put our focus on programming a plotter to produce complex shapes seemingly chaotic in the first place but based on the lagged fibonacci generator.

fibo_01

the second step was to use 16 pieces of electronic modules. by using the popular arduino boards and solenoids we developed little objects for producing sequenced rythms by letting the solenoids hitting different objects.

fibo_02

putting it all together in step three, we build up 8 boxes with measurements based on the golden cut. the outcome so far is now a sound installation with the concept of putting a different form of understanding to complex mathematical systems, so letting the listener experience a more subtle type of understanding.

“A little boy closed his eyes before he went to sleep. He thought about his lunch in the school, how the leafs are green and if u look it really close u can see some small veins, like the ones in the neck. He started to count how many of them he can see. 1, 2,1,3 … the numbers start flowting away, dancing in the black sky of his brain, changing colors, going up side down and suddently….one of them starts to make a cintilante sound, like a bell made of a fine glass. The other number got excited and try to imitate or follow the first one. They got lost, and back again, and a strange symphony was making the boy go deeper and deeper in his blackness. He hears Fibonacci when he sleeps.”

she[hypothesis]

Sunday, November 8th, 2009

in cooperation with michael kalivoda and alfred lenz

the installation consists of 6 identical build objects. each one features an arduino board, 2 servo motors and 2 magnetic field sensors. the kinetic energy of the motors produces discontinuous electro magnetic fields, which are registered by the sensors. these captured values serve as control signals for the motors. therefore each element is a closed system and acts without external influence.
one of the servo motors of each object is connected by a system of strings to another element, though controlling the horizontal position of the object by lifting and lowering. the second motor is also attached to another element controlling the vertical position of the object. a form of physical communication develops itself.
the title was generated with speech-to-text software that tracked the sound of the moving servo motors and interpreted it as language. a model of handing human decisions to digital systems.
the work featured at the “essence09”, the yearly exhibition of the university of applied arts in vienna.