Temperature Control with Thermistor

Temperature Control with Thermistor

Introduction

This experiment demonstrates how to use a thermistor to measure temperature and control a system, such as a fan, based on temperature readings.

Thermistor

Components Needed

Circuit Setup

  1. Connect one end of the thermistor to the 5V pin on the Arduino.
  2. Connect the other end of the thermistor to an analog input pin (e.g., A0) and also to a 10kΩ resistor that is connected to GND.

Ensure the thermistor is correctly placed for accurate temperature readings.

Thermistor Circuit Setup

Code for Temperature Control

Upload the following code to your Arduino to read the thermistor and control a device like a fan:


const int thermistorPin = A0;
int thermistorValue = 0;
float temperature = 0.0;

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

void loop() {
  thermistorValue = analogRead(thermistorPin);
  temperature = (thermistorValue / 1024.0) * 500.0; // Convert to temperature
  
  if (temperature > 30.0) {
    // Code to turn on a fan or activate cooling system
  }

  Serial.print("Temperature: ");
  Serial.println(temperature);
  delay(500);
}

Explanation

The code reads the analog value from the thermistor, converts it to a temperature, and can control a system based on the temperature reading.

Troubleshooting