Maintain a variable (for this project, the distance between a ball and a proximity sensor on a tilt) about a predefined setpoint value via a PID (Proportional-Integral-Derivative) Controller ran on an ...

Connect the resuting 4.5V battery plus terminal to the tilt-switch. Connect the other pin of the tilt-switch to piccolino pin 28. Connect the battery minus terminal to piccolino pin 27. Tools: ...