Dc Voltage Measurement Using Arduino

In this project i will show you how to measure Dc voltage up to 50v by using arduino and and display on OLED display module

part need

arduino UNO

oled display

10k ohm resistor

1k ohm resistor

jumper cable

arduino can measure maximum 5V DC so by voltage divider rule we can measure higher voltage

for design purpose i select 50 V maximum voltage so Vin = 50 , Vout = 5 (arduino max voltage) ,R1=10k ohm and by calculate as equation we get value of R2 = 1k ohm

connect oled display to arduino

Vcc => 5v

GND => GND

SCL => A5

SDA => A4

here

R1 = 10K ohm

R2 = 1K ohm

and connect cable as diagram

To control the OLED display you need the adafruit_SSD1306.h and the adafruit_GFX.h libraries.