Arduino based DC Voltmeter (0-50 volts)

In this post, we are going to make digital voltmeter using arduino uno. It's a DC voltmeter and it's range is 0 to 50 volt. As we know, arduino is an open source hardware prototyping platform used worldwide by the hobbyists, educators and students across the globe.
This is a handy voltmeter.

Stuff required:

1. Arduino uno
2. 16*2 lcd
3. 10k pot
4. voltage source

Objective of the project: To make a digital voltmeter, which can measure voltage from 0 to 50 volt DC and thereafter it can display on 16*2 LCD.

Connections:

Make the connections as given in the figure below:

Arduino based voltmeter

Once the connection is made, upload the source code.

/* Source code */

const int volt=A0;

float val=0.0;

#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  lcd.begin(16, 2);
  lcd.print("VOLTMETER");
}

void loop() {
  val=analogRead(volt);
  val=val*4.887;     // convert digital count into millivolt
  val=val/1000;      // convert millivolt into volts
  val=val*10.0;
  lcd.setCursor(0, 1);
  lcd.print(val);
}

/* End of source code */

Check out the video:

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Thanks for reading the post.