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 ...

ESP8266 ( wifi arduino) make http-server wich is connected to L298N h-bridge). Motor controller can start, stop , change rotation direction and pwm speed. Like I did in previous project 3 where L9110 ...