Arduino UNO R3 + Potenciômetro + LED

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#define potPin 0

#define ledPin 9

int valPot = 0;

void setup() {

pinMode(ledPin,OUTPUT);

}

void loop() {

valPot =  analogRead(potPin);

valPot = map(valPot,0,1023,0,255);

analogWrite(ledPin,valPot );

}