That was the way I understood it... the transistor in the static air heated
to a "baseline" level and the transistor in the air flow temperature
fluctuated with the amount of air passing it.

Rich

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of
Dario Greggio
Sent: Saturday, February 06, 2010 3:51 PM
To: Microcontroller discussion list - Public.
Subject: Re: [PIC] Measuring flow using a temperature sensor (and maybe a
heater)

Richard Pytelewski ha scritto:
> This EDN article may give you some ideas using transistors ... idea is
> reasonable and could be updated to minimize popcorn parts.
> =

> http://www.edn.com/contents/images/91902di.pdf
> =


Thank you very much Rick! almost perfect!
Well, so the point is "keeping the difference between 2 sensors @50=B0C", =

so this will cancel out the changes in incoming air temperature... I =

suppose?
In fact, it was my point. Our needs are to measure some 0..40=B0C air flow.

-- =


Ciao, Dario
--
Cyberdyne
-- =

http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist


-- =

http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist