I currently have an AC motor and want to control its speed using an Arduino. I also have a 220v voltage regulator (http://goo.gl/tbkxuN), which has a mechanical 100k potentiometer and can control the speed of the motor.
... However, when I connected the original terminals from the mechanical pot to the digital pot (which are two different circuits), the speed of the motor would not change.
The deliverable for this project is Arduino Code and a circuit diagram. I would like to use the components I already have, but I am open to purchasing new components if they achieve the goal better.