Digital Thermometer [For Beginners!]

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}

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}