Controls the flashing speed of an analog RGB led strip. The on duration is 10%. For use with a zoetrope

zoetrope_flasher_test.ino

#define LOWER_READ 143
#define UPPER_READ 940

#define INTERVAL_PIN A0
#define REDPIN 5
#define GREENPIN 6
#define BLUEPIN 9

#define ON_PERCENTAGE .1

long lastIntervalStart;
bool on;

void setup() {
  Serial.begin(9600);
  //Serial.println(frameDuration);
  pinMode(INTERVAL_PIN, INPUT);
  pinMode(REDPIN, OUTPUT);
  pinMode(BLUEPIN, OUTPUT);
  pinMode(GREENPIN, OUTPUT);
  lastIntervalStart = millis();
  on = false;

  setColor(255, 255, 255);
}

void setColor(int r, int g, int b) {
  analogWrite(REDPIN, r);
  analogWrite(BLUEPIN, b);
  analogWrite(GREENPIN, g);
}


void loop() {
  float intervalDuration = constrain(map(analogRead(INTERVAL_PIN), LOWER_READ, UPPER_READ, 0.0, 200.0), 0, 200.0);
  float onDuration = intervalDuration * ON_PERCENTAGE;
  float intervalElapsedTime = millis() - lastIntervalStart;

  if (on && intervalElapsedTime > onDuration) {
    on = false;
    setColor(0, 0, 0);
  }

  if (intervalElapsedTime > intervalDuration) {
    lastIntervalStart = millis();
    Serial.println(intervalDuration);
    on = true;
    setColor(255, 255, 255);
  }
}