Arduino-Capacitance-Meter kaynak dosyası

#include <LiquidCrystal.h>
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);
int32_t Htime;                  
int32_t Ltime;
float Ttime;
float frequency;
float capacitance;
void setup()
{
    pinMode(8,INPUT);            //pin 8 as signal input
    lcd.begin(16, 2);
    lcd.setCursor(0,0);
    lcd.print("capacitance =");
}
void loop()
{
    for (int i=0;i<5;i++)        //measure time duration five times
    {
        Ltime=(pulseIn(8,HIGH)+Ltime)/2;        //get average for each cycle
        Htime=(pulseIn(8,LOW)+Htime)/2;
    }
    Ttime = Htime+Ltime;
    frequency=1000000/Ttime;
   
    capacitance = (1.44*1000000000)/(20800*frequency);   //calculating the Capacitance in nF
    lcd.setCursor(0,1);
    lcd.print(capacitance);
    lcd.print(" nF   ");
    delay(500);
}