Arduino

80 min

If you want to measure the voltage between two points in a circuit or measure the voltage of a battery, you must use the voltage sensor module, which can measure voltage from 0 to 25 volts.

Project Video

Overview

In this tutorial, we will learn to interface the 0-25V DC voltage sensor module with Arduino and program it for voltage measurement and we will display the voltage on your computer.

Getting the Items

Arduino Uno R3 (Voltaat Version)

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Voltage Detection Module

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Energizer MAX 9V1 Battery

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9V battery adapter

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Jumper Wires – Male to Female (40 Pack)

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Steps

Wiring it Up

Connect the wires between the voltage sensor module and the Arduino, as shown in the image below.

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Connections from the voltage sensor module to arduino :

• + (vcc) → Arduino 5V pin

• - (GND) → Arduino GND pin

• S (signal) → Arduino pin A0

Coding

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/*
Voltaat learn (http://learn.voltaat.com)
Link for full tutorial: put the link of the tutorial here

Tutorial: measure dc voltage with arduino!

The function of this sketch is to obtain the value of voltage from the voltage sensor module and display it on your computer.

Connections from the voltage sensor module to arduino :

• + (vcc) → Arduino 5V pin

• - (GND) → Arduino GND pin

• S (signal) → Arduino pin A0

*/
int offset =20;// set the correction offset value

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

void loop() {

int volt = analogRead(A0);// read the input
double voltage = map(volt,0,1023, 0, 2500) + offset;// map 0-1023 to 0-2500 and add correction offset

voltage /=100;// divide by 100 to get the decimal values
Serial.print("Voltage: ");
Serial.print(voltage);//print the voltge
Serial.println("V");

delay(500);

}