Synesthetic Pitch Sensor
Description
Synesthesia is a neurological condition in which stimulation of one sensory/cognitive pathway leads to an involuntary experience in a secondary sensory/cognitive pathway. The Synesthetic pitch sensor was created to serve as a model for this concept, specifically color synesthesia relative to sound. A photocell is employed as an analog input to control the pitch from the output piezo speaker. RGB LEDs are then utilized to illustrate a certain color corresponding with what pitch is heard by the user.
Materials
3 RGB LEDs
1 Piezo speaker
1 photocell
Plastic Sheets
Styrofoam for LED diffuser
Arduino Code
/*
Color synesthesia pitch model
by Andrea Hsieh
created 4 Oct 2011
modification of
Pitch Follower
created 21 Jan 2010
Modified 4 Sep 2010
by Tom Igoe
This example code is in the public domain.
http://arduino.cc/en/Tutorial/Tone2
*/
//Analog pin setting
int sensorPin = A0;
//Digital pin settings
int greenPin = 10;
int redPin = 11;
int bluePin = 12;
int speakerPin = 9;
//Values
int val = 0;
void setup() {
// initialize serial communications (for debugging only):
pinMode(redPin, OUTPUT);
pinMode(greenPin, OUTPUT);
pinMode (bluePin, OUTPUT);
pinMode (speakerPin, OUTPUT);
Serial.begin(9600);
analogWrite(greenPin, 0);
analogWrite(redPin, 0);
analogWrite(bluePin, 0);
}
void loop() {
// read the sensor:
int sensorReading = analogRead(A0);
// print the sensor reading so you know its range
Serial.println(sensorReading);
// map the pitch to the range of the analog input.
// change the minimum and maximum input numbers below
// depending on the range your sensor's giving:
int thisPitch = map(sensorReading, 50, 400, 400, 50);
// play the pitch:
tone(9, thisPitch, 10);
// show color
val = analogRead(sensorPin); //read value from sensor
if(val > 350){
analogWrite(greenPin,255);
analogWrite(redPin,255);
analogWrite(bluePin,255);
//all
}
if(val <= 350){
analogWrite(greenPin, 255);
analogWrite(redPin, 0);
analogWrite(bluePin, 255);
//cyan
}
if(val <= 300){
analogWrite(greenPin, 127);
analogWrite(redPin, 0);
analogWrite(bluePin, 255);
}
if(val <= 250){
analogWrite(greenPin, 0);
analogWrite(redPin, 0);
analogWrite(bluePin, 255);
//blue
}
if(val <= 200){
analogWrite(greenPin, 0);
analogWrite(redPin, 127);
analogWrite(bluePin, 255);
//purple
}
if(val <= 150){
analogWrite(greenPin, 0);
analogWrite(redPin, 255);
analogWrite(bluePin, 255);
}
if(val <= 100){
analogWrite(greenPin, 0);
analogWrite(redPin, 255);
analogWrite(bluePin, 127);
}
if(val <= 75){
analogWrite(greenPin, 0);
analogWrite(redPin, 255);
analogWrite(bluePin, 0);
}
}
- Login to post comments
