flash led doesn't work with pulsein() function

Projects Programming
1

I need code to flashing LED by pulsein() function

I wrote the code but it doesn't work and the value of duration always is zero, why?

this is my code:

int LED = 10;
unsigned long duration;
unsigned long timeout=2000000;

void setup()
{
pinMode(LED, OUTPUT);
Serial.begin(9600);
}

void loop()
{
duration = pulseIn(LED, HIGH,timeout);
Serial.println(duration);
}

thank u

2

The pulseIn function reads an input. What is the signal that you are trying to read ?

3

thank u, now I understand it