Hi guys....since someone came up with FILD...Y not rig up a micro switch...a small tiny switch used in door closed sensors in lifts..etc if you can get one from radioshack. But problem with micro switches is that the connection requires soldering work and is bare so you can't use mains voltage. Basically when we fall asleep the muscles relax and yes the switch is normally closed or in the ON position. When the finger presses it is off you can fall asleep but when the switch is released the light or WILD aid (light or audio) comes on. For those who know electronics you could put a delay to turn on say like 5 minutes after releasing the switch to allow your fingers to rest a bit on and off before really dozing off.

IMJ