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 ...

Automate your home with a universal ESP32 Arduino script. Set up 2, 4, or 8-channel relay modules for offline switches and ...