Arduino Forum

Using Arduino => General Electronics => Topic started by: cjdelphi on Jan 08, 2013, 02:21 am

Title: Detecting "Touch"
Post by: cjdelphi on Jan 08, 2013, 02:21 am
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...
Title: Re: Detecting "Touch"
Post by: Magician on Jan 08, 2013, 03:07 am
It could be as simple as hot wire. Other way is to install temperature sensor and hot resistor in close proximity
Title: Re: Detecting "Touch"
Post by: cjdelphi on Jan 08, 2013, 03:40 am
interesting thoughts, thanks.... 
Title: Re: Detecting "Touch"
Post by: Docedison on Jan 08, 2013, 06:35 am
There are also "Force Sensing Resistors" that change resistance when bent.

Bob
Title: Re: Detecting "Touch"
Post by: fungus on Jan 08, 2013, 09:56 am
Here's a sculpture that responds to blowing...

http://vimeo.com/40904471


Title: Re: Detecting "Touch"
Post by: jtw11 on Jan 08, 2013, 02:28 pm
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!
Title: Re: Detecting "Touch"
Post by: fungus on Jan 08, 2013, 03:17 pm

Here's a sculpture that responds to blowing...

http://vimeo.com/40904471



That link doesn't seem to work for me, try this: http://technolojie.com/pu-gong-ying-tu-dandelion-painting/
Title: Re: Detecting "Touch"
Post by: draythomp on Jan 08, 2013, 06:26 pm
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.