I had an idea about the carbon fiber rings. Could you place the carbon fiber as it's own stand alone inlay or covering on the sections of the ring outside the chips? It could be a center band or outside edge band. Maybe extend around the chip inlays in the case of the wider alpha rings. I imagine such a ring would go for a premium price on the store site.
Carrunstate is just an arbitrary counter for which mode the arduino should be in. Handbrake state is the only input that's of any importance in that sketch - but wasn't working properly. Possibly my code is crap.
I'd imagine you could set up the arduino to rotate states so that the first read + delay will log you in and the next read + delay will log you back out again. @Nairod785 is looking into doing this with a beetle and PN532 V3 board. The PN532 V3 should work well with the ring and the whole package using the beetle would be tiny. thread here
Heh, I guess that'd do it too!
I just got my microview units so I'm going to be altering the car starter to incorporate one of those instead of the microduino, the microview has an inbuilt oled display, so I'll be able to do something nifty with that instead of the big string of LEDs across the dash to show mode.
I don't see why the ring itself couldn't be tapped at checkout in the very same manner as a phone/tablet. Logistically, with the right internals this shouldn't be a problem, and would provide the ideal solution.