OIC - A utility for measuring speaker impedance with an oscilloscope

I wrote this for personal use, but in case it's useful to anyone else, I have made it publicly available. It's a Windows* command-line utility that takes a CSV file from an oscilloscope of a frequency sweep across an unknown impedance and tuns it into a CSV of impedance vs. frequency so it can be turned into a chart.

* It's Windows-only due to the way it's been packaged. If you're willing to compile it from source then it should work on other OSes too.

You need a setup like this:

setup.png


setup.jpg


To capture a frequency sweep like this:


Picoscope Woofer-C.png


Which OIC can process so it can be turned into this (actually not from the same speaker as the above image, but you get the idea):

plot.png


It's available on GitHub here: https://github.com/cheese83/OIC. I've also attached both the executable and source code to this post.
 

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