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\nBuild your own auto-ranging Ohmmeter! (with Arduino)\n

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\n\nPublisher:\n\nProgramming Electronics Academy\n\n\n
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\nCheck out this ohmmeter built and coded from scratch using an Arduino, 8 precision resistors, a multiplexer, and an OLED display! It can measure resistance from 0Ohm to 1Gohm with fairly high accuracy and it’s even auto-ranging!We’ve...\nCheck out this ohmmeter built and coded from scratch using an Arduino, 8 precision resistors, a multiplexer, and an OLED display! It can measure resistance from 0Ohm to 1Gohm with fairly high accuracy and it’s even auto-ranging!

We’ve provided all the code, a parts list, and a schematic diagram linked in the description – so you can easily build this on your own as well.

We have our own Steve Stefanidis, one of Programming Electronics Academy’s technical writers, to thank for designing this great project.

Check out this project build, and watch us test it against an off-the-shelf multimeter we got from amazon.

Arduino ohmmeter on breadboard
OHMMETER SCHEMATIC
Arduino ohmmeter schematic
PARTS LIST
The parts required for this project are:

Arduino Uno, Nano, Pro Mini, Pro Micro or equivalent
1% tolerance 1/4W resistors: 49.9, 100, 1K, 10K, 100K, 1M, 4.99M, 10M
MAX 4617CPE High-Speed Low-Voltage CMOS 8:1 Analog Multiplexer
SSD 1306 OLED SPI display (2-color: yellow and blue)
220uF 16V filtering electrolytic capacitor
Breadboard and wires

OHMMETER CODE\n
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Resource Details

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Educator Rating
Not yet Rated
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Media Length
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10:30
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Grade
Higher Ed
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Subjects
Science
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Media Type
Instructional Videos
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Source:
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\nProgramming Electronics Academy\n\n
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Date
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2021
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Language
English
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Audiences
For Teacher Use
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Usage Permissions
Fine Print: Educational Use
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Concepts

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resistors, resistance, voltage, electronics
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Additional Tags

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arduino, arduino(brand), arduino tutorial, arduino lesson, open source hardware group, learning arduino, microcontrollers, arduino ide, arduino sketch, c++, programming electronics academy, free trial, reference resistor, pretty cool, cheap multimeter, precision resistors, oled display, analog read, arduino meter, unknown resistance, meter, unknown, build, start, project, 200 ohms, gotta, measure, code, check, built, provided, description, videos, alright, ahead
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Classroom Considerations

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Best For: Explaining a topic
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