#creative physics

After a few test i have seen that the Serial Monitor of the Arduino was sometime wrong and just had wrong data.

Like you can see here:

To kill that for a fluetly installation, i updated the code and inserted a filter. Here is the updated code for the Arduino with comments:

#define trigPin 12 #define echoPin 13

float looper,zwischenspeicher; //global cache & Looper (for init the programm with zero at startup)

void setup() {  Serial.begin (115200 );  pinMode(trigPin, OUTPUT);  pinMode(echoPin, INPUT);  looper=0; //Init with zero  zwischenspeicher=0; //Init cache with zero }

void loop() {  float duration, distance;

 digitalWrite(trigPin, LOW);  delayMicroseconds(2);

 digitalWrite(trigPin, HIGH);  delayMicroseconds(10);  digitalWrite(trigPin, LOW);

 duration = pulseIn(echoPin, HIGH);

 if (looper == 0){  zwischenspeicher = (duration / 2) * 0.0344;  }// save first messure into the cahe

 else {    zwischenspeicher = (zwischenspeicher +( (duration / 2) * 0.0344))/2;  } // addition of the actuall messuringpoint to the chache and divide by two

 looper++; // Looper is going up 1 step

 if (looper >= 100){ //if 100 times messured    distance = zwischenspeicher; //cache is distance  looper=0; // reset looper  zwischenspeicher=0; // reset cache  Serial.println(distance); // output  }

 delay(5); // delay shorter for for output }

Now it looks more like this:

The idea is inpired by the movie „39,90“ (or 99F in the original title). In the beging of the film the maincharacter is looking into a mirror. His face is changing in diefferent parts, while he is looking into the mirror. His nose, his eyebrows and his chin are changing to parts of another person. I want to recreate this experience in a different way. For that i am photographing eight different persons (man and woman). The pictures will show the same neutral mien with the same light and the same crop. The face will change in different parts in the installation. These parts will be: mouth/chin, eyes/nose and form of the head/hair/ears. Size of the room will be 1.30 meter width and 3.50 meter length. The walls will be painted black to bring the focus to the Screen placed at the end of the room. To change the size of the room, i will use panels. The first face you will see will allways be the same. A ultrasonicsenor used by a arduino will detect the location of the person in the room. It begins to react with a length of three meters and begins with that distance to change the face in parts. If you take a step back the face will change backwords. In the whole distance the face will change seven times. These changes will need one second and will blend the different pieces together. The Screen will be controlled by a raspberry pi.

By Jason Efstathiou

My project is a little “magic box” with a hole that you can stick your finger in - and when you do, music starts playing. The cool thing? The music syncs itself to your heartbeat.

When you move your hand into the box, a motion sensor detects it and triggers the “presence LED” and immediately afterwards sends a MIDI START signal to a connected PC running Ableton. The project starts playing - dynamically generated. Afterwards, the heartrate sensor gets activated and tries to find your pulse; once it did, it starts sending TAP signals to Ableton via MIDI. This leads to the project tempo being in sync with your heartrate after a few seconds. Because the music is not simply an audio file, but actually synths and effects playing in real time, there is no distortion or similar artifacts. In addition to playing the music, the box also has exposed connectors for lamps that blink in harmony with the beat.

Behind the scenes, three Arduinos are at work - one that reads the motion signals and communicates the presence of a hand, another one that controls the lights, and a third one that reads the heartrate and sends the MIDI signals to the Ableton instance running on a PC connected via USB. The Arduinos communicate with each other using a simple I2C network. The MIDI signals are sent as Serial signals over USB and interpreted on the PC using an open source software called MIDI-hairlessserial, which converts the Serial strings to MIDI and routs them into Ableton.

The prototype, schematic, exposed and built into a wooden box.

During the course, I finished a prototype in a very beautifully handcrafted wooden box. My “dream” for the project however includes a larger and more polished exhibition setup, with a much better heartrate sensor and lights that get controlled via a DMX dimmer, allowing smooth fades and a much nicer atmosphere. For this, I would also create a slightly rhythmic ambient song that represents life, yada yada, making the whole thing a very atmospheric and unique experience.

TEST

Hi, This is a test using phosphorescent paint. 

The video is accelerated because the time every image takes to disappear is almost 2 minutes. 

I discovered that is important to expose the paint just for a second and then cover the projector lens for at least 2 minutes while the image disappear.

URBANSCREEN at its best!