25 VDC Voltage Sensor

• Output interface:
  “+” connected to 5 / 3.3 V
  “–” connected to GND
  “s” connected to an analogue pin of an Arduino or another microcontroller

int analogInput = A1;
float vout = 0.0;
float vin = 0.0;
float R1 = 30000.0;
float R2 = 7500.0;
int value = 0;
void setup(){
pinMode(analogInput, INPUT);
Serial.begin(9600);
Serial.print(“DC VOLTMETER”);
}
void loop(){
// read the value at analog input
value = analogRead(analogInput);
vout = (value * 5.0) / 1024.0;
vin = vout / (R2/(R1+R2));

Serial.print(“INPUT V= “);
Serial.println(vin,2);
delay(500);
}