void setup() { // initialize digital pin LED_BUILTIN as an output. pinMode(13, OUTPUT); Serial.begin(9600);//enable serial monitor

}

// the loop function runs over and over again forever void loop() { int pwm = analogRead(A0);//read analog value and put in to the variable pwm = map(pwm, 0, 1023, 0, 4000);// 0-1023 to 0-255 Serial.println(pwm);//print serial monitor digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level) delay(1600); // wait for a second digitalWrite(13, LOW); // turn the LED off by making the voltage LOW delay(800); // wait for a second }