This is an easy tutorial showing how you can control the brightness of an LED or adjust the speed of a DC fan using Arduino Board, a small BC547 transistor and a potentiometer. In my example the whole ...

As before, the LED is connected to the Arduino via a resistor. We define the pin of Arduino that is connencted to the common contact of the switch, as INPUT_PULLUP, which means that this pin is an ...

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A (10K) potentiometer attached to each axis provides proportional feedback of the up/down and left/right positions. The joystick is spring-loaded, so that it always returns to its centered position ...