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 ...

You will need an Arduino board, a potentiometer (I have used a 50K one), as ... Then store this value inside the speed variable that is used in the delay() to control how much time to wait until the ...

[Christian] wrote in to tell us about his third-generation Arduino MIDI sequencer (translated ... components seen above include the slider and potentiometer band, as well as the repository ...

Once his son showed him an Arduino ... calls knob steering, a potentiometer drives the existing hydraulic pump, which he controls with a Polulu Qik serial DC motor controller.