#include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27, 16, 2); #define artikutup A0 float vout = 0.0; float vin = 0.0; float R1 = 100000.0; // 100K ohm direnç float R2 = 10000.0; // 10K ohm direnç int value = 0; void setup() { pinMode(artikutup, INPUT); Serial.begin(9600); lcd.init(); lcd.setCursor(4, 0); lcd.print("VOLTMETRE"); delay(2500); lcd.clear(); } void loop() { value = analogRead(artikutup) / 14,46; Serial.println(value); vout = (value * 5.0) / 1024.0; vin = vout / (R2 / (R1 + R2)); if (vin < 0.09) { vin = 0.0; } lcd.setCursor(4, 0); lcd.print("-VOLTAJ-"); lcd.setCursor(6, 1); lcd.print(vin); lcd.print("V"); Serial.print("Voltaj:"); Serial.print(vin); Serial.println("V"); delay(500); }