Project 1 - Interfacing a 16*2 LCD with Arduino using I2C protocol

int analogPin = 0;
int raw = 0;
int Vin = 5;
float Vout = 0;
float R1 = 1000;
float R2 = 0;
float buffer = 0;

void setup()

{
Serial.begin(9600);
}

void loop()

{
raw = analogRead(analogPin);
if(raw)

{
buffer = raw * Vin;
Vout = (buffer)/1024.0;
buffer = (Vin/Vout) - 1;
R2= R1 * buffer;
Serial.print("Vout: ");
Serial.println(Vout);
Serial.print("R2: ");
Serial.println(R2);
delay(1000);
}
}

Output :