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Today I tried making a "Nanino" printed circuit board, by using my 2.5w homebrew laser engraver to cut away spray paint on a standard copper-clad board to create an etching mask, then etch away the exposed copper with "poor man's etch", a mixture of Vinegar, Peroxide, and Salt that can be put together at most grocery stores.
I'm quite pleased with the results.. please like the video and subscribe to my channel if you enjoy it!