I can't think of a better word to describe what i'm on about that touch.
With a touch sensor, you can use the capacitance to determine if it's been touched or not, but what about human skin? how would one go about
triggering a circuit from merely blowing on a sensor? I thought about using a microphone to detect the sound of someone blowing, touching is easy
but feeling the pressure on your skin from air flow...
Has anyone ever come across a sensor that actually detects low air pressure movement? would it even be possible? or we in the realms of startrek here...
There are a couple of apps for the iPad which mimic candles, when the iPad is blown on the candle flickers - using the microphone as you have suggested... and works very well!
I sensed air movement (unintentionally) using a tmp35 to measure temperature. It was an annoyance because I didn't want it to be that sensitive, but it did a really nice job of sensing a casual breeze when I walked by it.