This DIY gas leakage detector is designed for educational and basic monitoring purposes. For critical safety applications, ...

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 ...

Potentiometers, or variable resistors ... up in which a voltage controlled current source feeds the pot while an Arduino with a motor controller turns it through a stepper motor, and takes ...