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The original was posted on /r/reverseengineering by /u/BitBangingBytes on 2024-01-12 20:47:53+00:00.

Fuming nitric acid is hard to get, but great for decapping. This video shows how I made some then also built an OpenFlexure Delta Stage to view and move the silicon under my microscope.

Good for uncovering unknown IC’s with no datasheet.