# Arduino Thermometer, LCD Display, Thermistor

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## Introduction: Arduino Thermometer, LCD Display, Thermistor

*** This project is no longer supported, the arduino code is outdated and no longer works, my arduino broke so I can't fix it, if you have a fix feel free to PM me! ***

Its an arduino project, creating a temperature measurer, with a thermistor, and outputs to an lcd display

Plug the thermistor in A0 through 5v
and follow the schematic, to hook up the lcd...

Parts list:
1,  2X16 white on black LCD
1, 10k Thermistor
1, Variable Resistor
1, Breadboard
1, 10k resistor
1, Arduino ( I use UNO)
1, 9v battery (Optional)
1, DC plug adaptor for 9v battery (Optional)

Here's the code

#include
#include
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

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

return Temp;
}

void setup() {

lcd.begin(16,2);
lcd.clear();

Serial.begin(115200);
}

void loop() {
Serial.println(int(Thermister(analogRead(0)))); // display Fahrenheit

lcd.print(int(Thermister(analogRead(0))));

lcd.print(" degress C");

delay(100);

lcd.clear(); Participated in the
I Made It Photo Contest Participated in the
MakerBot Challenge

## 14 Comments

Hi! I am making a project on temperature measurements with arduino uno and thermistor. I am using the voltage divider method to determine the resistance of the thermistor, and the steinhart model for temperature calculations. However, when I tested it on a boiling water the resistance obtained by the setup where not the same on the multimeter readings, so that, instead of obtaining a temperature of 100 deg Celsius I obtained higher than that ranging from 101 deg Celsius-116 deg Celsius. Do you have any suggestions on how can I fix that?