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Re:The laser and microphone atop Mars 2020, NASA's next rover by MertsA on Tuesday February 11, 2020 @08:19AM (#22298214)
You'd be interested in Ben Krasnow's DiY attempt. It's still understandable but he tries to explain why it's built the way it is and give you a good basis of the theory of operation.

https://www.youtube.com/watch?v=nIKhUizkXxA

Re:The laser and microphone atop Mars 2020, NASA's next rover by dmix on Tuesday February 11, 2020 @12:11PM (#22300132)
That's awesome, it does a good job of explaining it in layman terms which I needed, thank you.