Digital Thermometer [For Beginners!]

A digital thermometer which measures temperature in Celsius. Big thanks to Elegoo for their products and their electronic guide!

Mar 31, 2019

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34544 views

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10 respects

environmental sensing

displays & screens

Components and supplies

RGB Backlight LCD - 16x2

Solderless Breadboard Full Size

Rotary Potentiometer - Linear (10k ohm)

Thermistor [Tempature Sensor]

Jumper wires (generic)

Resistor 10k ohm

ELEGOO UNO R3 Board ATmega328P ATMEGA16U2 with USB Cable

Apps and platforms

Arduino Web Editor

Arduino IDE

Project description

Code

Arduino IDE

arduino

You just can copy & paste it later!

1//www.elegoo.com
2//2016.12.9
3
4#include <LiquidCrystal.h>
5int  tempPin = 0;
6//                BS  E  D4 D5  D6 D7
7LiquidCrystal lcd(7, 8,  9, 10, 11, 12);
8void setup()
9{
10  lcd.begin(16, 2);
11}
12void loop()
13{
14  int tempReading = analogRead(tempPin);
15  // This is OK
16  double tempK =  log(10000.0 * ((1024.0 / tempReading - 1)));
17  tempK = 1 / (0.001129148 + (0.000234125  + (0.0000000876741 * tempK * tempK )) * tempK );       //  Temp Kelvin
18  float  tempC = tempK - 273.15;            // Convert Kelvin to Celcius
19  float tempF  = (tempC * 9.0)/ 5.0 + 32.0; // Convert Celcius to Fahrenheit
20  /*  replaced
21    float tempVolts = tempReading * 5.0 / 1024.0;
22    float tempC = (tempVolts  - 0.5) * 10.0;
23    float tempF = tempC * 9.0 / 5.0 + 32.0;
24  */
25  // Display  Temperature in C
26  lcd.setCursor(0, 0);
27  lcd.print("Temp         C  ");
28  // Display Temperature in F
29  //lcd.print("Temp         F  ");
30  lcd.setCursor(6,  0);
31  // Display Temperature in C
32  lcd.print(tempC);
33  // Display Temperature  in F
34  //lcd.print(tempF);
35  delay(500);
36}

//www.elegoo.com
//2016.12.9

#include <LiquidCrystal.h>
int  tempPin = 0;
//                BS  E  D4 D5  D6 D7
LiquidCrystal lcd(7, 8,  9, 10, 11, 12);
void setup()
{
  lcd.begin(16, 2);
}
void loop()
{
  int tempReading = analogRead(tempPin);
  // This is OK
  double tempK =  log(10000.0 * ((1024.0 / tempReading - 1)));
  tempK = 1 / (0.001129148 + (0.000234125  + (0.0000000876741 * tempK * tempK )) * tempK );       //  Temp Kelvin
  float  tempC = tempK - 273.15;            // Convert Kelvin to Celcius
  float tempF  = (tempC * 9.0)/ 5.0 + 32.0; // Convert Celcius to Fahrenheit
  /*  replaced
    float tempVolts = tempReading * 5.0 / 1024.0;
    float tempC = (tempVolts  - 0.5) * 10.0;
    float tempF = tempC * 9.0 / 5.0 + 32.0;
  */
  // Display  Temperature in C
  lcd.setCursor(0, 0);
  lcd.print("Temp         C  ");
  // Display Temperature in F
  //lcd.print("Temp         F  ");
  lcd.setCursor(6,  0);
  // Display Temperature in C
  lcd.print(tempC);
  // Display Temperature  in F
  //lcd.print(tempF);
  delay(500);
}

Arduino IDE

arduino

You just can copy & paste it later!

1//www.elegoo.com
2//2016.12.9
3
4#include <LiquidCrystal.h>
5int
6  tempPin = 0;
7//                BS  E  D4 D5  D6 D7
8LiquidCrystal lcd(7, 8,
9  9, 10, 11, 12);
10void setup()
11{
12  lcd.begin(16, 2);
13}
14void loop()
15{
16
17  int tempReading = analogRead(tempPin);
18  // This is OK
19  double tempK =
20  log(10000.0 * ((1024.0 / tempReading - 1)));
21  tempK = 1 / (0.001129148 + (0.000234125
22  + (0.0000000876741 * tempK * tempK )) * tempK );       //  Temp Kelvin
23  float
24  tempC = tempK - 273.15;            // Convert Kelvin to Celcius
25  float tempF
26  = (tempC * 9.0)/ 5.0 + 32.0; // Convert Celcius to Fahrenheit
27  /*  replaced
28
29    float tempVolts = tempReading * 5.0 / 1024.0;
30    float tempC = (tempVolts
31  - 0.5) * 10.0;
32    float tempF = tempC * 9.0 / 5.0 + 32.0;
33  */
34  // Display
35  Temperature in C
36  lcd.setCursor(0, 0);
37  lcd.print("Temp         C  ");
38
39  // Display Temperature in F
40  //lcd.print("Temp         F  ");
41  lcd.setCursor(6,
42  0);
43  // Display Temperature in C
44  lcd.print(tempC);
45  // Display Temperature
46  in F
47  //lcd.print(tempF);
48  delay(500);
49}

//www.elegoo.com
//2016.12.9

#include <LiquidCrystal.h>
int
  tempPin = 0;
//                BS  E  D4 D5  D6 D7
LiquidCrystal lcd(7, 8,
  9, 10, 11, 12);
void setup()
{
  lcd.begin(16, 2);
}
void loop()
{

  int tempReading = analogRead(tempPin);
  // This is OK
  double tempK =
  log(10000.0 * ((1024.0 / tempReading - 1)));
  tempK = 1 / (0.001129148 + (0.000234125
  + (0.0000000876741 * tempK * tempK )) * tempK );       //  Temp Kelvin
  float
  tempC = tempK - 273.15;            // Convert Kelvin to Celcius
  float tempF
  = (tempC * 9.0)/ 5.0 + 32.0; // Convert Celcius to Fahrenheit
  /*  replaced

    float tempVolts = tempReading * 5.0 / 1024.0;
    float tempC = (tempVolts
  - 0.5) * 10.0;
    float tempF = tempC * 9.0 / 5.0 + 32.0;
  */
  // Display
  Temperature in C
  lcd.setCursor(0, 0);
  lcd.print("Temp         C  ");

  // Display Temperature in F
  //lcd.print("Temp         F  ");
  lcd.setCursor(6,
  0);
  // Display Temperature in C
  lcd.print(tempC);
  // Display Temperature
  in F
  //lcd.print(tempF);
  delay(500);
}

Downloadable files

This is the Wiring Diagram [It show how to connect the wires]

By just looking at it you can build the whole circuit!

This is the Wiring Diagram [It show how to connect the wires]

By just looking at it you can build the whole circuit!

This is the Wiring Diagram [It show how to connect the wires]

Documentation

Here is an image of the project!

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