Did you notice an odd light flashing or shining when trying to charge your Tesla? It may be an indicator of a problem ...

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 ...

If you have ever closely observed a helicopter, you must have noticed the red and green lights. In fact, these lights are not only present on helicopters but also on commercial and private airplanes.