THERMISTOR WITH ARDUINO UNO R3

A thermistor is a type of resistor whose resistance varies significantly with temperature.

Step 1: COMPONENTS REQUIRED

- Arduino Uno board * 1

- USB cable * 1

- Thermistor * 1

-Resistor (10k) * 1

- Breadboard * 1

- Jumper wires

Step 2: Principle

The resistance of the thermistor varies significantly with ambient temperature. It can detect surrounding temperature changes in real time. Send the temperature data to analog I/O port of SunFounder. Next we only need to convert sensor output to Celsius temperature by simple programming and display it on the serial port

Step 3: Schematic Diagram

Step 4: Procedures

Step1:

Build the circuit.

Step 2:

Download the code from https://github.com/primerobotics/Arduino

Step 3:

Upload the sketch to the Arduino Uno board

Click the Upload icon to upload the code to the control board.

If "Done uploading" appears at the bottom of the window, it means the sketch has been successfully uploaded.

Now, you can see current temperature displayed on the serial monitor.

Step 5: Code

/************************************
 *
name:thermistor
 * function:you
can see current temperature displayed on the serial monitor.
 **************************************
/Email: [e-mail]
//Website: www.primerobotics.in
#define analogPin 
A0 //the thermistor attach to 
#define beta 3950 //the beta of the thermistor
#define resistance 10 //the value of the pull-down
resistor
void setup()
{
 
Serial.begin(9600);
}
void loop()
{
  //read
thermistor value 
  long a =
analogRead(analogPin);
  //the
calculating formula of temperature
  float tempC =
beta /(log((1025.0 * 10 / a - 10) / 10) + beta / 298.0) - 273.0;
  //float tempF
= 1.8*tempC + 32.0;//convert centigrade to Fahrenheit
 
Serial.print("TempC: 
");//print" TempC: "
 
Serial.print(tempC);//print Celsius temperature
 
Serial.print("  C");//print
the unit
 
Serial.println();
 
//Serial.print("TempF: 
");
 //
Serial.print(tempF);
 //
Serial.print("  F");
  delay(200);
//wait for 200 milliseconds
}