read value from one analog input in Processing

import processing.serial.*;

Serial port;
float val;

void setup() {
size(800, 600);
String arduinoPort = Serial.list() [0];
port = new Serial(this, arduinoPort, 9600);
}

void draw() {
if (port.available() > 0) {
val = port.read();
// val = map(val, 0, 255, 0, height);
}

background(val);
}

read one analog input in Arduino

const int firstPin = A0; // sensor to control value on analog input 0


void setup()
{
Serial.begin(9600);
}

void loop()
{
Serial.print(analogRead(firstPin));
}

Rough Noise Sketch

float inc = 0.008;
int density = 4;
float znoise = 0.0;

void setup() {
 size(720, 480);
 noStroke();
}

void draw() {
 float xnoise = 0.0;
 float ynoise = 0.0;
 for (int y = 0; y < width; y += density) {
   for (int x = 0; x < height; x += density) {
     float n = noise(xnoise, ynoise, znoise) * 200;
     //noise(x, y, z);
     if (mouseX>360) {
       fill(n+mouseY); }
       else {
     fill(n); }
     rect(y, x, density, density);
     xnoise += inc;
   }
   xnoise = 0;
   ynoise += inc;
 }
   znoise +=inc;
 }

Sparkfun Electronics

http://www.sparkfun.com

Light Into Sound!

Alex and Matthew perform their custom-built Phototheremins...

Arduino Sketch, Phototheremin

//Example 07: Send to the computer the values read from
//analogue input 0
//Make sure you click on "Serial Monitor"
//after you upload

#define SENSOR 0 // select the input pin for the
// sensor resistor
const int numReadings = 10;

//int val = 0; //variable to store the value coming from the sensor
int readings[numReadings]; // the readings from the analog input
int index = 0; // the index of the current reading
int total = 0; // the running total
int average = 0; // the average

int inputPin = SENSOR;


void setup() {

Serial.begin(9600); // open the serial port to send data back to the computer
// at 9600 bits per second
for (int thisReading = 0; thisReading < numReadings; thisReading++)
readings[thisReading] = 0;

}

void loop() {

// subtract the last reading:
total= total - readings[index];
// read from the sensor:
readings[index] = analogRead(inputPin);
// add the reading to the total:
total= total + readings[index];
// advance to the next position in the array:
index = index + 1;

// if we're at the end of the array...
if (index >= numReadings)
// ...wrap around to the beginning:
index = 0;

// calculate the average:
average = total / numReadings;
// send it to the computer (as ASCII digits)

//val = analogRead(SENSOR); //read the value from the sensor

Serial.println(average, DEC); //print the value to the serial port

//delay (10); // wait 10 ms between each send
}

Max Patch Part 2, for Phototheremin

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