An Arduino random smoke generator

microfogger-random-smoke.ino

#define SMOKE_PIN A0
#define MIN_SMOKE_TIME 1000
#define MAX_SMOKE_TIME 5000

void setup() {
  // configure the output pin to control the smoke generator
  pinMode(SMOKE_PIN, OUTPUT);
  // Enable the Arduino device's onboard LED
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
  // turn the smoke machine on
  digitalWrite(SMOKE_PIN, HIGH);
  digitalWrite(LED_BUILTIN, HIGH);
  // leave it on for a random time between MIN_SMOKE_TIME
  // and MAX_SMOKE_TIME (in milliseconds)
  delay((int)random(MIN_SMOKE_TIME, MAX_SMOKE_TIME));

  // turn the smoke machine off
  digitalWrite(SMOKE_PIN, LOW);
  digitalWrite(LED_BUILTIN, LOW);
  // Wait for another random amount of time
  delay((int)random(MIN_SMOKE_TIME, MAX_SMOKE_TIME));
  // Go back and do it again
}