The humble piezo element is often used as little more than a buzzer in many projects. However, you can do more with them, as [Something Physical] demonstrates with their nifty piezo noise box.

Most humans with two ears have a pretty good sense of directional hearing. However, you can build equipment to localize audio ...

Nature Photonics - Flexible optoelectronics. Fabrication of the device starts with the growth of microscale LEDs, each measuring 100 μm × 100 μm × 2.523 μm, using the etch-and-release scheme.