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int photoCellPin = A3;
int photoCellReading = 0;
int ledPin = D3;
int ledBrightness = 0;


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

}

void loop() {
    
    photoCellReading = analogRead(photoCellPin);
    
    ledBrightness = map(photoCellReading, 0, 4095, 0, 255);
    analogWrite(ledPin, ledBrightness);
    delay(100);
    

}
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