That’s because brushless DC motors require carefully timed signals used in a process called Electronic Speed Control (ESC). [Fileark] built and ESC using an Arduino and has a couple of posts ...

This Arduino Uno-powered project is designed to automatically change the speed of a DC motor depending on how hot or cool your room is. If your room's temperature is below 29 degrees Celsius (84.2 ...

The sensor sends “hit” signals to a small Arduino Uno via a PC817 optocoupler. The headcount is then displayed on a small LCD screen positioned above the speed bag, allowing you to keep track ...