void setup(){
  Serial.begin(9600);
  pinMode(A0, INPUT);
  pinMode(A5, OUTPUT);
}

bool state = false;
void loop(){
  uint16_t adc_val = analogRead(A0);
  //analogWrite(A8, adc_val);
  digitalWrite(A5, HIGH);
  Serial.println(adc_val);
  //delay(1000);
  //digitalWrite(A8, LOW);

  delay(10);
}