int DC = 0, AC = 0;
float voltsDC, voltsAC;

void setup() 
{
  Serial.begin(9600);  
}

void loop() 
{
  DC = analogRead(A0);  
  voltsDC = DC * 12.0 / 1023.0 ; //por relacion de resistencias
  Serial.println(voltsDC);
  
}

void readAC()
{
  AC = analogRead(A1);
  voltsAC = map(AC, 1023, 0, 0, 127);
  Serial.println(voltsAC);
  delayMicroseconds(294);
}