Imagine a teacher handing back exam papers. One student sees a page full of green ticks and smiles. Another notices a warning note highlighted in red and immediately pays attention. Colours do more ...

The Raspberry Pi is a super fun gadget used by many creatives and DIY enthusiasts. There's a project for every room in the house, and there are several Raspberry Pi starter kits if you've never used ...

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.

Mobile Green Light: Does your mobile phone have a green light on the side when you're talking? You've probably wondered what it is. As much as the use of technology is making our lives easier, it is ...

Sachin Bahal is a freelance tech writer. He has a bachelor's in journalism from Toronto Metropolitan University and studied journalism and photography at Durham College. A tech geek since childhood, ...