The Arduino development platform lends itself to many other activities and one of these is the world of amateur radio. You can create simple projects such as automatic CW keyers to antenna tuning systems - and one example of this has been demonstrated by K3NG Anthony Good.
The tuner is based around a large network of capacitors and inductors, switched with a bank of relays - and the Arduino can detect the standing-wave ration (SWR) using two analogue input pins. And as you can see in the video below, the system can be controlled neatly from an LCD keypad shield.
Although still in "beta" stage his tuner shows much promise, and there's enough information provided to work on your own version, so to get started visit his interesting website. And for more, we're on facebook, Google+, and twitter - so follow us for news and product updates as well.
If you're an experienced Arduino user and interested in more advanced Arduino projects - get yourself a copy of "Practical Arduino" by Jonathan Oxer and Hugh Blemings:
Create your own Arduino-based designs, gain an in-depth knowledge of the architecture of Arduino, and learn the easy-to-use Arduino language all in the context of practical projects that you can build yourself at home. Get hands-on experience using a variety of projects and recipes for everything from home automation to test equipment. For more information and to order, click here.