#define MAX_AV_LEVEL 600
#define MIN_AV_LEVEL 300
#define MAX_INTENSITY 10
#define MIN_INTENSITY 1
// 300 / 14 = 21
const uint16_t INTENSITY_STEP = round((MAX_AV_LEVEL - MIN_AV_LEVEL) / (MAX_INTENSITY - MIN_INTENSITY));

#define LDR_PIN A0

const float GAMMA = 0.7;
const float RL10 = 50;

void setup() {
  pinMode(A0, INPUT);
  Serial.begin(9600);
  Serial.println(INTENSITY_STEP);
}

void loop() {
  uint16_t analogValue = analogRead(A0);
  Serial.print(analogValue);
  Serial.print(" => ");

  if (analogValue < MIN_AV_LEVEL) {
    analogValue = MIN_AV_LEVEL;
  }
  if (analogValue > MAX_AV_LEVEL) {
    analogValue = MAX_AV_LEVEL;
  }
  Serial.print(analogValue);

  uint8_t intensityLevel = MAX_INTENSITY - round((analogValue - MIN_AV_LEVEL) / INTENSITY_STEP);
  Serial.print(" / ");
  Serial.print(INTENSITY_STEP);
  Serial.print(" = ");
  Serial.println(intensityLevel);

  delay(400);
}