///checking for voltage value at each second
//float voltage_val = 256;
int led_pin = 11;
void setup() {
  Serial.begin(9600);
  pinMode(led_pin, OUTPUT);
}
void loop() {
  for (int i = 0; i < 510; i++) {
    int val = i * (1-i/256) + (255-i%255) * (i/256);

    float voltage = float (val)*5/255;
    Serial.print(i);
    Serial.print(" > ");
    Serial.println(voltage);

    analogWrite(led_pin, val);
    delay(10);
  }

  // Serial.print("voltage_val = ");
  // Serial.println(voltage_val);
  // for (int i = 0; i < 256; i++) {
  //   int voltage = i*5/255.0;
  //   analogWrite(led_pin, i++);
  //   delay(100);
  // }
}