FSR and visualization

Objective: I have hooked up my FSR to light up a LED and output a visualization graph using Processor. The graph makes higher lines according to amount of force on sensor and captures the time of force on the sensor as well. At the edge of the screen it will go back to the beginning. For my mechanical construction I constructed a hand that you push in order to apply force to the sensor. I thought it would be interesting to create an iconic symbol for my FSR.

 

Materials:

-FSR

-photocell

-led

-wires

-resistors

-breadboard

 

Software : Processor

 

//got hep from Arduino documentation

import processing.serial.*;

// Change this to the portname your Arduino board

String portname = "/dev/tty.usbmodemfd121"; // or "COM5"

Serial port;

 

int xPos = 1;

void setup(){

  size(600,600);

  frameRate(10);

  smooth();

  background(40,50,40);

  noStroke();

 

  port = new Serial(this, portname, 9600);

}

void draw() {

}

 

void serialEvent (Serial port) {

String inString = port.readStringUntil('\n');  //read serial until new line

 

if (inString != null) {

float fsr = float(inString);

fsr = map(fsr, 0, 1023, 0, height);  //map instring value

 

// draw the line:

 stroke(127,34,255);

 line(xPos, height, xPos, height - fsr);

 

 // at the edge of the screen, go back to the beginning:

 if (xPos >= width) {

 xPos = 0;

 background(0); 

 } 

 else {

 // increment the horizontal position:

 xPos++;

 }

 }

}