I've been wanting to do this project for quite some time but have been waiting for the cooler weather, that's when I do most of my projects. This was one of the first projects on my list because I want to use what I learned here in another more ambitious project that I'll be starting shortly. The picture below shows the finished product and as you can see there are very few parts and a very simple layout. I'm a software guy if I can do it anyone can. The total price of materials for this project was right around $11 and it took maybe 1-1/2 to do everything with the only thing remainingis to find some kind of enclosure for it, but it works and that is not a show stopper.