code_microphone_light.txt

Example 3
Microphone & RGB LED

Adopted idea with wiring and original code:
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1277468653/

**************************************************************
Arduino code (only)
**************************************************************


int MicPin = 0;          // pin that the mic is attached to

int redPin = 9;          // pins that the cathodes of LED are attached to  
int greenPin = 10;
int bluePin = 11;

int MicValue = 0;        // the Microphone value
int t=60;                // mic sensitivity - 50-90 seems optimal

void setup() {
  //Serial.begin(9600);  //for test the input value initialize serial
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);

  analogWrite(redPin, 255);       //turn off all LEDs
  analogWrite(greenPin, 255);
  analogWrite(bluePin, 255);
}

void loop() {

  MicValue = analogRead(MicPin);  //read the value of the microphone

  //Serial.println(MicValue);     //for test the input value

  if (MicValue > 530+t) {     //adjust this value to the desired sensitivity
    analogWrite(bluePin,0); //lights up blue
    delay(15);              //small delay for quick response at low noise levels
    }
  
  if (MicValue > 540+t) {       //adjust this value to the desired sensitivity
    analogWrite(bluePin,255); //lights up green and turn off blue
    analogWrite(greenPin, 0);
    delay(60);               //mid delay for response at mid noise levels
    }
  
  if (MicValue > 550+t) {        //adjust this value to the desired sensitivity
    analogWrite(greenPin,255); //lights up red and turn off green
    analogWrite(redPin, 0);
    delay(140);                //high delay for response at high noise levels
    }

analogWrite(greenPin, 255);    //Turn off all LEDs
analogWrite(redPin, 255);
analogWrite(bluePin,255);  

} 

analogWrite(greenPin, 255);    //Turn off all LEDs
analogWrite(redPin, 255);
analogWrite(bluePin,255);  

}