Integrated circuits, chipsets, memory modules, and all kinds of other transistor-based technology ... full-sized PCs from a few decades ago. The Arduino is no exception to this trend, either ...

We all know, at least intellectually, that our computers are all built with lots of tiny transistors ... around various inscrutable integrated circuits. On the other hand, this computer goes ...

In this quick Arduino tutorial I will explain how you can control a relay using the Arduino Board, one 1K and one 10K resistors, 1 BC547 transistor, one 6V or 12V relay, one 1N4007 diode and a 12V fan ...