arduino-super-annoyer.ino

arduino-super-annoyer.ino

/**
 * This little projects creates random sounds through the piezo speaker. The range 
 * (in Hz) can be defined at the top of the code (frequencyLowerBound, 
 * frequencyUpperBound). The interval/duration of each tone is determined by the 
 * current state of the potentiometer. As the potentiometer is turned open the tone 
 * slows done.
 *
 * Requirements:
 * - Arduino Nano/Uno
 * - Solderless breadboard
 * - Jumper wires
 * - 4x LED of your favorite color
 * - 4x 220 Ohm resistors
 * - 100 Ohm resistor
 * - Piezo speaker
 * - Potentiometer
 *
 * Sorry, I don't have the schematics for this one anymore :)
 */

int ledWhite = 10;
int ledRed = 11;
int ledYellow = 12;
int ledBlue = 13;

int piezoPin = 9;
int potPin = 2;

int interval = 0;
int frequencyLowerBound = 100;
int frequencyUpperBound = 400;

void setup() {
  pinMode(ledWhite, OUTPUT);
  pinMode(ledRed, OUTPUT);
  pinMode(ledYellow, OUTPUT);
  pinMode(ledBlue, OUTPUT);
}

void loop() {
  interval = analogRead(potPin);  
  
  if (interval > 1) {
    killLeds();
    tone(piezoPin, random(frequencyLowerBound, frequencyUpperBound), interval);
    digitalWrite(random(10,14), HIGH);
    delay(interval);
  } else {
    killLeds();
  }
}

void killLeds()
{
  digitalWrite(ledWhite, LOW);
  digitalWrite(ledRed, LOW);
  digitalWrite(ledYellow, LOW);
  digitalWrite(ledBlue, LOW);
}