For quite a few hackers out there, it’s still hard to find a decently powerful Raspberry Pi for a non-eye-watering price. [Rupin Chheda] wanted to build a magic mirror with a web-based frontend, and a ...

Windows and mirrors embedded with liquid crystals can hide images that appear only when the right kind of light is shined on them. The technique, inspired by a 4000-year-old trick for building “magic ...