10 LED bar graph code for Arduino uno.

10leds.ino

/*
  Little code for my 10 LED bar graph.
  This is just a basic outline for making all the segments light up at diff. intervals.
  looks OK but not super organized.
*/

int numPins = 10;
int ledPins[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
int ledStates[] = {LOW, LOW, LOW, LOW, LOW, LOW, LOW, LOW, LOW, LOW};

void setup() {
  // set the digital pin as output:
  int i = 0;
  for(i=0; i < numPins; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
}

long last[] = {0,0,0,0,0,0,0,0,0,0};
long interval[] = {100, 200, 300, 400, 500, 600, 700, 800, 900, 1000};

void loop(){
  /*** Get current time in milliseconds ***************/
  unsigned long currentMils = millis();

  /** Blink the first on every 100 ms **/
  int i = 0;
  for( i = 0; i < numPins; i++) {
       if(currentMils - last[i] > interval[i]) {
        // if the LED is off turn it on and vice-versa:
        if (ledStates[i] == LOW)
          ledStates[i]= HIGH;
        else
          ledStates[i] = LOW;
          
        // set the LED with the ledState of the variable:
        digitalWrite(ledPins[i], ledStates[i]);
        last[i] = currentMils;
      }
   }// end pin state for-loop
} // End main loop