#define LIGHT_SENS 6
#include <Servo.h>
Servo myservo; 

int pos = 0;  

// LDR Characteristics
const float GAMMA = 0.7;
const float RL10 = 50;


void setup() {
  Serial.begin(9600);
   pinMode(LIGHT_SENS, INPUT);
  
   myservo.attach(6);


}

void loop() {

  int analogValue = analogRead(LIGHT_SENS);
  float voltage = analogValue / 1024. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

 Serial.println(lux);


if (lux < 400)  { pos=0;}
if (lux > 400 && lux < 2000)  { pos=70;}
if (lux > 2000 && lux < 10000)  { pos=120;}
if (lux > 10000)  { pos=180;}

 myservo.write(pos);           
    delay(150);     



}