Please, see documentation on Magnetic Loop Antenna controlled by Android and Arduino.
This repository contains the source code and schematics about Antenna Tuner with two capacitors (Servos) controlled by Android and Arduino with new user interface for Android.
Access Magnetic Loop Antenna controlled by Android and Arduino for more detail. This documentation has more information about how can you start building an Antenna Tunner controlled by Arduino.
You can see about this project on my youtube channel:
Antenna Tuner with two capacitors controlled by Arduino (https://www.youtube.com/watch?v=Rwl3G2ET7Jw) and Part II Tuner Magnetic Loop Antenna for two capacitors and Arduino (https://www.youtube.com/watch?v=Fv-IV88IJV4).
Suggestions are welcome.
73 PU2CLR
Ricardo Caratti - 17 / 11 / 2013