#include <math.h>

#define sensorPin A0
#define BETA 3950

int ledArray[] = {4,5,6,7,8,9,10,11,12,13};
const int numLeds = 10;

void setup() {
  pinMode(sensorPin, INPUT);
  for (int i = 0; i < numLeds; i++) {
    pinMode(ledArray[i], OUTPUT);
  }
}

void loop() {
  int analogValue = analogRead(sensorPin);
  float celsius = 1 / (log(1 / (1023.0 / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  int numLedsToLight = map((int)celsius, -24, 80, 0, numLeds);
  
  for (int i = 0; i < numLeds; i++) {
    if (i < numLedsToLight) {
      digitalWrite(ledArray[i], HIGH);
    } else {
      digitalWrite(ledArray[i], LOW);
    }
  }
  delay(10);
}