An Arduino with 40 lines of code ... ridiculously simple and we’re wondering why we didn’t have a similar setup on our blisteringly cold office AC system before seeing it.

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 ...

To that end he’s created a rig for characterising a potentiometer ... s a simple enough set-up in which a voltage controlled current source feeds the pot while an Arduino with a motor controller ...