Here's the "first look" at an assembled PCB for this unit. I have to say, works pretty well! It's closest range appears to be 3-4 inches and the longest range was around 3 feet. This was strictly preliminary testing saving a boxcar around. Plug-n-play, it ran right out of the box.
I used Stan's choice for the relay, it's a 3A model. You'll note the blank space for a 10A relay, you can mount either one. I'm using a 5V 500ma switching module that I use on a number of products, but you can also use the LM7805T regulator in that spot as well.
I give a big hand to Stan, it worked as advertised just copying his schematic and plopping it onto a PCB.
