The device is made of blue LEDs and acrylic plexiglass to create a fancy raindrop lamp. The device is made of blue LEDs and acrylic plexiglass to create a fancy raindrop lamp. During the construction ...

[Steven] had one of those musical gift cards laying around, and thought he might as well reuse the piezo speaker inside it. Without a particular project in mind, he soldered an LED to the piezo and ...

The droplet-based electricity generator has a high energy-conversion efficiency and power density thousands of times bigger than its counterparts. The developers hope the tech will help to tackle the ...