Example Code for Arduino-Voltage Detection

Wiring Diagram

Sample Code

void setup()
{
  Serial.begin(9600);
}
void loop()
{
      int val;
      float temp;
      val=analogRead(0);//This divider module will divide the measured voltage by 5, the maximum voltage it can measure is 25V.
      temp=val/40.92; //
      val=(int)temp;//
      Serial.println(val);
      delay(100);
}