Help with code, Hdd Pov Clock

Projects General Guidance
2

I think it would work if you synchronized the LED loop with the interrupt. By re-starting the LED timer with each interrupt you should be able to keep the blinking locked to the position of the platter. Something like this:

int leds=8; //Led strip on pin 8, connect to 12v from ATX trough ULN2003

unsigned long tiempoAnterior = 0;
volatile unsigned long tiempoLeds = 0;
unsigned long tiempoVuelta=0;
volatile  unsigned long vueltas=0;
int ledState=LOW;

void setup()
{
  attachInterrupt(0, rpm_fun, FALLING); //interrupt 0 -> pin 2
}

void loop()
{
  unsigned long tiempoActual = micros();
  if(vueltas>=20)
  {
    tiempoVuelta = (tiempoActual-tiempoAnterior) / vueltas; //Each turn takes aproximately 8310 uS
    tiempoAnterior = tiempoActual;  
    vueltas=0;   
  }

  if(tiempoActual-tiempoLeds >= (tiempoVuelta/4))           //tiempoVuelta/4 -> Split each revolution time into 4
  {                                                     
    tiempoLeds=tiempoActual;   //Last time Leds blinked
    ledState = !ledState;
    digitalWrite(leds, ledState);
  }
}

void rpm_fun()
{
  vueltas++;
  tiempoLeds = micros();
}