Celebrating Pi Day With A Ghostly Calculator

For the last few years, [Cristiano Monteiro] has marked March 14th by building a device to calculate Pi. This year, he’s combined an RP2040 development board and a beam-splitting prism to cre…

HUD-Like Clock Is A Transparent Time Display

While we have all types of displays these days, there’s something special about those that appear to float in the air. This HUD clock from [Kiwi Bushwalker] is one such example. The build rel…