diff --git a/modules/white-noise/white-noise.ino b/modules/white-noise/white-noise.ino new file mode 100644 index 0000000..c30b386 --- /dev/null +++ b/modules/white-noise/white-noise.ino @@ -0,0 +1,25 @@ +/* + * + * White Noise Generator (simple) + * + */ +long randNumber; //variable to store random number +int pwmPin = 11; //define output pin, Meergranen output pin is 11 + +void setup() { + // if analog input pin 5 is unconnected, random analog + // noise will cause the call to randomSeed() to generate + // different seed numbers each time the sketch runs. + // randomSeed() will then shuffle the random function. + randomSeed(analogRead(5)); + + pinMode(pwmPin,OUTPUT); //set pwmPin to output mode (otherwise the built-in pulldown resistor sets it as input, aka you wont hear anything) +} + +void loop() { + randNumber = random(10, 100); //generate random number between 10 and 100 + digitalWrite(pwmPin, LOW); //set output pin to LOW (0v) + delayMicroseconds(randNumber);//wait for randomNumber (10-100 Mircroseconds (0.00001-0.0001 seconds)) + digitalWrite(pwmPin, HIGH); //set output pin to HIGH (5v) + delayMicroseconds(randNumber); //wait for randomNumber (10-100 Mircroseconds (0.00001-0.0001 seconds)) +}