Laser engraved and etched circuit boards!
etch tank
Nowadays diode laser engravers are powerful enough to cut through a few millimeters of wood and you can get a fairly large one for under 200 euros.
Cutting wood into shapes always was a makerspace thing I loved to have in my home lab, but it didn't justify buying one.
A laser engraver can also make it easy to prepare bare circuit boards for etching at home though! I'll explain how I do this, and how it makes creating PCB's very easy if you have an etch tank in your lab.
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