Código para capacimetro caseiro

//creditos ao canal WR Kits

#include <LiquidCrystal.h>

#define charge 12

#define discharge 11

#define resistor 2150.0F

#define capLoad A0

LiquidCrystal disp(8,

9,

4,

5,

6,

7);

unsigned long Time01;

unsigned long Time02;

float microFarads;

float nanoFarads;

void setup()

{

pinMode(charge, OUTPUT);

digitalWrite(charge, LOW);

disp.begin(16, 2);

disp.setCursor(2,0);

disp.print("Capacimetro");

}

void loop()

{

digitalWrite(charge, HIGH);

Time01 = millis();

while(analogRead(capLoad) < 648){ }

Time02 = millis() - Time01;

microFarads = ((float)Time02 / resistor) * 1000;

if (microFarads > 1)

{

disp.setCursor(5,1);

disp.print((long)microFarads);

disp.print(" uF");

}

else

{

nanoFarads = microFarads * 1000.0;

disp.setCursor(5,1);

disp.print((long)nanoFarads);

disp.print(" nF");

}

digitalWrite(charge, LOW);

pinMode(discharge, OUTPUT);

digitalWrite(discharge, LOW);

while(analogRead(capLoad) > 0){ }

pinMode(discharge, INPUT);

delay(300);

}