Imagine this: you’ve got a blank piece of metal, plain and unremarkable. Then, with a flash of light, intricate patterns ...

But what about a laser engraver without the laser? Can that be of any use? Apparently, the answer is yes, if you can harness the power of the sun. That’s what [Lucas] did with his solar-tracking ...

Sure, it’s possible to use a CNC router to mill out a PCB, and ditto for a fiber laser. But neither tool is perfect; the router creates a lot of dust and the fiberglass eats a lot of tools ...