const int ledPin = 11;

void setup() {
  // put your setup code here, to run once:
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  int value = analogRead(A0);
  Serial.print("original value: ");
  Serial.print(value);
  Serial.println();

  int voltage;
  voltage = map(value, 0, 1023, 0, 5000);
  analogWrite(ledPin, value);

  Serial.print("Voltage: ");
  Serial.println(voltage);
  delay(200);
}