In this video, I created a blood oximeter by using the MAX30105 particle sensor to figure out the changes in color of passing ...

Many people base huge swaths of their lives on foundational philosophical texts, yet few have read them in their entirety.

You can buy all kinds of conventional clocks that have hands and numbers for easy reading. Or, like [Fabio Ricci], you could build yourself something a little more esoteric, like this neat shadow ...