Uploaded November 2019 | Updated September 2026, 2 weeks ago

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Teardown, evaluation, theory, and speculation about an odd little portable '100MHz', single channel oscilloscope. I saw it and had to grab one to peak under the hood. Spoiler alert: there is some strange stuff going on... I broke the vid up into 3 since it was stupidly long, but I wanted to shoehorn some theory in there, and add some speculation.

Here is DAAAAAAAAVE's vid about the same scope youtu.be/SIH48bIUU00

EDIT: cpassuel has pointed out in a comment that some clever people ARE INDEED working on getting this gizmo more workable. They are still in the initial stages, but you can check the progress here: eevblog.com/forum/projects/reverse-engineering-fnirsi-5012h

And if you end up being interested after watching all 3 vids...
FNIRSI 5012h Oscilloscope amzn.to/2XfwWI5

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