This Lightweight Projector Is Cheaper Than Many 85-Inch TVs — and It Makes a Vibrant 4K Picture That's Twice as Big

I've been testing projectors for years, and the BenQ GP520 4K Projector has impressed me with its simple setup, lack of ...
Hackaday

Volumetric Display With Lasers And Bubbly Glass

There’s a type of dust-collector that’s been popular since the 1990s, where a cube of acrylic or glass is laser-etched in a three-dimensional pattern. Some people call them ...