Although that comes with a few downsides as well, with plenty of people feeling that the smart phone makes it a little too easy to waste ... take a look at this DIY cell phone which takes care ...

A circuit always has a battery (cell) but it can also contain other electrical components, such as bulbs, buzzers and motors. When drawing circuit diagrams, rather than drawing detailed components ...

Emma Majury: Hi. How do you see yourself? Well, now's your chance to show people because I'm going to show you how to draw a self-portraitusing lots of different techniques and materials.