You’re undoubtedly familiar with the clip-on blood oxygen sensor and meter that uses a pair of LEDs and a photosensor. This non-intrusive transmissive-light device—which took decades to develop, ...

[Patrick] was prepping for some future projects he had in mind, for which he will need a simple 2D array of addressable LEDs. While it is certainly possible for him to build his own LED array and ...

All too often component manufacturers are the unsung heroes behind a great product. It's easy to recognize the brand whose name is on the box, but a large part of the work that goes into making a ...

Arrays of vertical-cavity surface-emitting lasers boast properties such as narrow emission spectrum and a stable output wavelength. Jean-Francois Seurin and Chuni Ghosh of Princeton Optronics argue ...