void setup() {
  Serial.begin(115200);
  pinMode(A0, OUTPUT);
}

void loop() {
  int sensorValur;
  sensorValur=analogRead(A0);
  Serial.println(sensorValur);
  float voltage;
  voltage=sensorValur*(5.0/1023.0);
  Serial.println(voltage);
  delay(1000);
  analogWrite(A0,map(sensorValur,0,1023,0,255));

}