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26 lines
1007 B
Arduino

5 years ago
/*
*
* 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))
}