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 ...

Developers, makers and hobbyists looking for a mini PC that is a Arduino compatible might be interested in the newly launched pcDuino3 Nano which is now available to purchase for just $39.