ljusslinga

Jag har gjort en ljusslinga som går på när det blir mörkt.

int led1 = 9;

void setup()
{
pinMode(led1, OUTPUT);

}

void loop() {

int ldr = analogRead(A0);

if(ldr >= 450)
{
digitalWrite(led1, HIGH);

}

else
{
digitalWrite(led1, LOW);

}
}

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