// Reference https://docs.wokwi.com/parts/wokwi-ntc-temperature-sensor
#define sensorPin A0
#define BETA 3950
int ledArray[] = {4,5,6,7,8,9,10,11,12,13};
const int numLEDs = 10;
const float minTemp = -24.0;
const float maxTemp = 80.0;
void setup() {
// initialize LEDs and sensor pin
for (int i = 0; i < numLEDs; i++) {
pinMode(ledArray[i], OUTPUT);
}
}
void loop() {
// Read the sensor value , calculate the temperature, light up the leds
// Read the sensor value
int sensorValue = analogRead(sensorPin);
// Convert the analog reading to temperature in Celsius
float celsius = 1.0 / (log(1.0 * (1023.0 / sensorValue - 1.0)) / BETA + 1.0 / 298.15) - 273.15;
// Map the temperature to the range of 0 to 10
int ledLevel = map(celsius, minTemp, maxTemp, 0, numLEDs);
// Ensure the ledLevel is within bounds
ledLevel = constrain(ledLevel, 0, numLEDs);
// Light up the corresponding number of LEDs
for (int i = 0; i < numLEDs; i++) {
if (i < ledLevel) {
digitalWrite(ledArray[i],LOW );
} else {
digitalWrite(ledArray[i], HIGH);
}
}
delay(10); // this speeds up the simulation
}