Digital Ohmmeter Circuit Design

by aybikeavci07 in Circuits > Arduino

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Digital Ohmmeter Circuit Design

Ohmmeter_Project_image.pdf.jpg

Measuring resistance accurately is a crucial task in various electronics and engineering applications. In this project, we designed and implemented a digital ohmmeter using an Arduino Nano and an LCD display to measure the resistance of unknown resistors.

This ohmmeter leverages the simplicity and reliability of a voltage divider circuit. By connecting an unknown resistor in series with a reference resistor, the circuit measures the voltage drop across the unknown resistor. The Arduino processes the data and displays the resistance value in real time on an LCD screen, making the system user-friendly and efficient.

You can see (and I hope you like :D ) the video of the circuit on YouTube: https://youtu.be/8y6ASUdMpxs


Supplies

Ardunio NANO

LCD Screen (16x2)

Cable

2.2 kohm resistor for LCD screen contrast

1 kohm for reference resistor

1 unknown resistor

Tinkercad Design

Ohmmeter_tinkercad.jpg

Tinkercad Pre Design

Schematic of Circuit

Schematic.jpg

Here, connections are shown in detail.

Ardunio Code

Original Code

Ardunio Revised Code

Revised code

Project Report