See, I don't know if they were really "Devices"...
It now seems that the whole "circuit board" business may have been simply the actual appearance of the mooninite (which is basically like one of the alien enemies in the ancient "Space Invaders" video game.)
I was looking at post 9 which I thought had a picture of the "device" and then seeing where Turner was talking about billboards. Do you know if the billboards made reference to the "devices" scattered around the different cities? Or did they reference mooninite appearances but not let local authorities know where and when the mooninite's would pop up?