From March 21-23, 2024, the Arduino community is set to celebrate its 11th annual Arduino Days, a gathering that promises to be a hub of innovation and learning.

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 ...