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[on:]

Hello, everyone.

I would like to know, when I breath in with some air flow sensor. The idea is simple, for now, I put sensor near my lips and breath in, sensor should sense my breathing and send so data to Arduino.

I would like to know, does anybody know anything about using air flow sensors? If so, I would like to know more information (URL, circuits, etc.) about air flow sensors compatible with Arduino controller.

Thank you in advance.

Best regards,
Simas

[Reply #1 on:]

It could be something like breathing sensor.

[Reply #2 on:]

Looong time back I saw a system which had 2 sensors - tiny thermistors - placed in a pipe, few inches from each other. When the medium (gas, liquid) flown through the pipe the temperature fluctuations were  measured by both thermistors and a computer calculated a correlation of the both signals. A proper math may give you the speed of the medium as the output. A nice weekend project..

[Reply #3 on:]

Thanks for your advice, but I need more information, how to do this, some useful URL or pdf for doing this.

[Reply #4 on:]

http://arduino.cc/forum/index.php?topic=103044.0

[Reply #5 on:]

Try http://shop.moderndevice.com/products/wind-sensor for a thermal example.

[Reply #6 on:]

Thanks for all your advices, but I need some sensor that would sense when I breath in and breath out.

[Reply #7 on:]

Sorry, I hadnt watched all URLs you posted, guys. I found one, that does fit for me. Thank you all!

[Reply #8 on:]

so could u post what u are looking at then please.

some one else might gain from the info

[Reply #9 on:]

Here's the URL http://arduino.cc/forum/index.php?topic=66695.0