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 ...
//#include "secret.h" // <<--- UNCOMMENT this before you use and change values on config.h tab #include "my_secret.h" // <<--- COMMENT-OUT or REMOVE this line before you use. This is my personal ...