//Simple Stroboscope by Hari Wiguna

byte ledPin = 13; // Digital Pin 13
byte potPin = 0; // Analog Pin 0

void setup() {
  pinMode(potPin, INPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
 // This controls the frequency of the flashing, smaller delayValue = faster flash.
  int potValue = analogRead(potPin);
  int delayValue = potValue/4;

  digitalWrite(ledPin,HIGH);
  delay(2); // How long should the strobe be on.  Larger is brighter, but will blur the effect.

  digitalWrite(ledPin,LOW);
  delay(delayValue); // How long should the strobe be off. 
}