Eckstein komponente KS0530 - Page 97

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(7) Extension Practice：
Let’s observe the status of LED if we change the delay value.
/*
keyestudio sun_follower
lesson 2.2
PWM
http://www.keyestudio.com
*/
#define LED 3 //define the pin of LED as D10
int value;
void setup()
{
pinMode(LED, OUTPUT);// initialize digital pin LED as an output.
}
void loop () {
for (value = 0; value < 255; value = value + 1) {
analogWrite (LED, value); // LED lights gradually light up
delay (20); // delay 20MS
}