Testing out Octocoupler (02 May 2014)

IMG_2483

Simple blinking LED code used for this experimentation. 1.5 volts IR LED and 5 volts LED are blinking respectively from the same arduino code, however both of them are powered from different power sources. Two circuits separated with an octocoupler.

Arduino Code is down below:

///////////////////////////////////////////////////
// Blinking Test for UV and IR LEDs //
// IR is 1.5 Volts, however UV 5 Volts //
// So Octotoupler used for two different cicuits //
///////////////////////////////////////////////////
//LTV4N35 used/////////////////////
//Arduino - Octocoupler //
/* PIN 10 = PIN 1 */
/* GND = PIN 2 */
/* -LED = PIN 5 */
/* -1.5 V = PIN 6 */
int led_IR= 10;
int led_UV = 9;
void setup() { 
 pinMode(led_IR, OUTPUT); 
 pinMode(led_UV, OUTPUT); 
}
// the loop routine runs over and over again forever:
void loop() {
 digitalWrite(led_IR, HIGH); // turn the Infrared LED on 
 digitalWrite(led_UV, LOW); // turn the Ultraviolet LED off
 delay(750); // wait for a second
 digitalWrite(led_UV, HIGH); // turn the Ultraviolet LED on 
 digitalWrite(led_IR, LOW); // turn the Infrared LED off 
 delay(750); // wait for a second

}

Making of complement surface

IMG_2491

To be able to put different materials on the glass, and provide a tactile input to the spectator, a complement surface had been made by using Tinkerman method. Complement surface consists of a waterproof silicon, which was applied to a plastic film by using a soft foam roller. Yet, this process creates a texture very similar to human skin and responsive to the FTIR surface.

Digital Media – Final Prototype

DIAGRAM

 Prototype the Structure

Several custom built hardwares and advanced computing techniques had been used to build the interface of this project. The physical structure consists of two basic modules which are, FTIR interface and Cymascope. Each module has almost the same body and when combined together, they create the entire installment. Additionally an Arduino microcontroller located inside of the FTIR module that controls most of the events happening inside the prototype.

The top surface of the FTIR module consists of 35 by 25 centimeter piece of 10mm thick acrylic glass. Also, the frame that holds the glass in place is covered with a custom made array of Infrared LED’s. These special LED’s emits only infrared light which is not visible to the human eye. A similar system could be built with normal LED’s however, it would cause serious problems such as, being affected by natural or ambient light, as I experienced in my previous prototypes.

To be able to put different materials on the glass, and provide a tactile input to the spectator, a complement surface had been made by using Tinkerman method. Complement surface consists of a waterproof silicon, which was applied to a plastic film by using a soft foam roller. Yet, this process creates a texture very similar to human skin and responsive to the FTIR surface.

The materials that create a texture on the FTIR surface are, mat (represents the distortion effect), bubble wrap (noise effect), soft towel (ambient echo), and table cloth made of synthetic cotton (delay effect). Pressure that spectators finger will apply on these materials, going to measured by a touch sensor located below the frame and going to set the effect level. As the spectator touches on the materials, relative effects will be triggered and applied on the ambient sound.

FTIR surface video can be found on this link: https://www.youtube.com/watch?v=D26N-rHWL_s

An Arduino microcontroller used to operate components of the prototype such as, LED’s and pressure sensor. Basically, it has three tasks to do. First of all, controlling the IR LED’s condition, whether they are switched on or off, to decrease power consumption. Since IR LED’s are 1.5 volts, an octocoupler used to separate two circuits that are working with different voltages. Secondly, controls the color of RGB LED’s to create unique color mixture on the liquid holder. Finally, gets data from pressure sensor which is placed under the acrylic frame.

Cymascope module of the installment consists of a black acrylic liquid holder, a speaker, sound transmitter tube, membrane and RGB LED’s. The final solution to transfer sound waves from the speaker to liquid is created by the influence of tonoscope. One end of the tube glued to the speaker and the other end enclosed by a flexible membrane. Thus, any interaction between the air inside and outside of the tube had been blocked. As a result, the motion created by up and down movement of the speaker can directly be transferred to the liquid holder. Ultimately, according to the vibration frequency different patterns can emerge on the liquid surface. Liquid holder has chosen to be black, in order to reduce reflections coming from other sources rather than LED’s. The reason why the RGB light sources located on the sides of the liquid holder is to make colorful patterns visible from all sides.

Cymascope video can be found on this link: https://www.youtube.com/watch?v=fs0oehisD8U

 

Colorful Cymatic Patterns

Sound level creates different color variations, also speaker placed under liquid holder creates emerging patterns on the water. Sounds of “city traces/soundscape city diary” (https://www.youtube.com/watch?v=tS3JNgok5n8) from youtube was used as a sound source.

https://www.youtube.com/watch?v=fs0oehisD8U

 

FTIR Interface – Blog Tracking and Sound Manipulation

https://www.youtube.com/watch?v=D26N-rHWL_s&feature=youtu.be

Prototype Graphical Illustration

DIAGRAM

Making of FTIR 03-05-2013 (Testing out the whole setup)

1609956_10203196121842464_4321477423783972456_n

Day6

Everything was ready and tested out. The result was satisfying…

Making of FTIR 02-05-2013 (Electronics Assemblage)

IMG_2475

Day 5

All pieces was ready to put together, and electronics that I need had been arrived. At this stage, I designed a holder to keep all electronics in order, hence I will not be struggling to find which wore goes to where.

The holder is made of cardboard and keeps all materials in order. Besides, all materials are demountable, so if anything goes wrong it would be very easy to replace.

Making of FTIR 30-04-2013 (main body)

IMG_2467

Day 3

After the frame and sub-frame pieces glued together and dried, I started to built main body of the installment. Dimensions are, Width:300mm, Depth 400mm, Height: 450mm. The height was decided after testing out the view angle of the camera. The structure consists of plywood which is then covered with cardboard for fully enclosure.

Making of FTIR 01-05-2013 (frame electronics)

IMG_2437

Day 4

Once the frame and sub-frame ready, I started to asseble IR LED s and solder them in a way that, creating an LED strip. This process took a long time, since there was 60 LED s to be soldered.

All the LED s soldered together and fits into the holes drilled on the frame.

Later on, the led s tested whether they are working or not and when proved, placed into frame,then each strip soldered together and covered with silicone in order to protect them from external factors. Finally, acrylic strips placed into the hole carved before for maximum protection and to create smooth end.