So maybe Hornady already had this in mind when I built mine, but at the very least it shows I was on the right track. For those who don't remember, or care, I designed and built a "control panel" for my Hornady Lock-n-Load press. It counted primers, warned when they were out and also reminded me when I forgot to prime a case. Here's a picture of my setup from August, 2011.

WELL? Guess what Hornady introduced at SHOT Show?
The Lock-N-Load® Control Panel.http://www.hornady.com/store/Lock-N-Load-Standard-Control-Panel

Of course their model does so much more and has a number of other functions. Plus they have the "standard" model and the "deluxe" model and a number of optional sensors.
Wonder if they applied for a patent on their system?