A big part of my extreme home office makeover was setting up ambient lighting around my desk and keyboard using inexpensive LED ... green line is the wire connecting the push button switch, the ...

However, if you do own a Raspberry Pi, you'll know of the red and green LED lights on the mini-computer's board. But what do these lights mean? Using a Raspberry Pi offers more delicate work than ...

The biggest stories of the day delivered to your inbox.

But to create a white LED, red, blue and green light need to be combined. While the first two colors have been relatively easy to manufacture, researchers have struggled to produce a green LED.