Uno (12, 11, 5, 4, 3, 2) PWM
LCD- (4, 6, 11, 12,13,14) so pin 12 to pin 4 etc.
From Uno: 5v pin2, gnd pins 1,5
backlight : eg from external PSU : 4V to pin 15 via 220 ohm resistor, and 0V to pin 16.
LCD contrast pin3, a 3.6k ohm to gnd
10k thermistor with 10k resistor divider, 5v to gnd; sig to pin A0
CODE:
#include <LiquidCrystal.h>
int ThermistorPin = 0;
int Vo;
float R1 = 9900;
float logR2, R2, T;
float c1 = 1.009249522e-03, c2 = 2.378405444e-04, c3 = 2.019202697e-07;
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void setup() {
Serial.begin(9600);
}
void loop() {
Vo = analogRead(ThermistorPin);
R2 = R1 * (1023.0 / (float)Vo - 1.0);
logR2 = log(R2);
T = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2));
T = T - 273.15;
T = (T * 9.0)/ 5.0 + 32.0;
//conv C
T = (T - 32) / 1.8;
lcd.print("Temp = ");
lcd.print(T);
lcd.print(" C");
delay(5000);
lcd.clear();
}
