1.	/*
2.	DC Voltmeter 
3.	Arduino DVM based on A-D voltage divider
4.	ZS6KMD
5.	*/
6.	#include <LiquidCrystal.h>
7.	LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
8.	int analogInput = 0;
9.	float vout = 0.0;
10.	float vin = 0.0;
11.	float R1 = 100000.0; // resistance of R1 (100K) NOTE -see text!
12.	float R2 = 10000.0; // resistance of R2 (10K) NOTE - see text!
13.	int value = 0;
14.	void setup(){
15.	   pinMode(analogInput, INPUT);
16.	   lcd.begin(16, 2);
17.	   lcd.print("DC VOLTMETER");
18.	}
19.	void loop(){
20.	   // read the value at analog input
21.	   value = analogRead(analogInput);
22.	   vout = (value * 5.0) / 1024.0; // NOTE - see text
23.	   vin = vout / (R2/(R1+R2)); 
24.	   if (vin<0.09) {
25.	   vin=0.0;//statement to limit any undesired reading
26.	} 
27.	lcd.setCursor(0, 1);
28.	lcd.print("INPUT V= ");
29.	lcd.print(vin);
30.	delay(500);
31.	}