Designed to work with all of the Arduino boards, this Analog Temperature Sensor is easy to incorporate into any project requiring only a 5V supply, ground, and an analog input to measure the sensors reading. It can be used to detect temperatures from -55°C - +125°C.

This thermistor-based analog temperature sensor can be used with an Arduino to return the ambient temperature value in Celsius. Uses a 10K Ohm resistor in series with a thermistor to give an analog output.

Test Code

void loop () {
Serial.print (Thermister (analogRead (0))); // display Fahrenheit
ARD2-2213Serial.println ("c");
ARD2-2213delay (500);
}

# Include <math.h>

double Thermister (int RawADC) {
double Temp;
Temp = log (((10240000/RawADC) - 10000));
Temp = 1 / (0.001129148 + (0.000234125 + (0.0000000876741 * Temp * Temp)) * Temp);
Temp = Temp - 273.15; / / Convert Kelvin to Celsius
return Temp;
}

void setup () {
Serial.begin (9600);
}