Subject:
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Re: Cheap air flow sensor
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 15 Jun 1998 19:56:44 GMT
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Original-From:
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ED Spike, E&CE Dept. <spike@eestaff.watstar.uwaterloo.caSAYNOTOSPAM>
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Viewed:
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1377 times
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We have used model boat propellers on a ballbearing and on a brass bushing.
Keep the bearing or bushing well lubricated for good sensitivity at low
air volume (ie: low speed of the propeller).
We used the propeller mounted in 1.5 inch and 2 inch PVC black plumbing pipe.
Optical encoder replaced an optical diode pair which the three blade
propeller tips moved through.
73,33
On Mon, 15 Jun 1998, Jonathan Swaby wrote:
Does anyone know of a cheap way to construct an air flow sensor? I was
> looking for an article in EDN on using a self-heated transistor to measure
> airflow, but Ican't find it.
>
> I was also wanting to know if there is a way to create a humidity sensor,
> or does anyone know of a low cost part?
>
> I am wanting to connect these to a miniboard.
>
> Thanks
> ___________________________________________________________
> ______________________________________________________
> Jonathan Swaby 305 Sparks Bldg
> Computer Support Specialist 814-865-0693
>
> Penn State University mailto:jfs10@psu.edu
> Department of Speech Communication http://cac.psu.edu/~jfs10
> Department of Philosophy
> ______________________________________________________
> ___________________________________________________________
---------------------------------------------------------------------
Ed Spike VE3TCK
E&CE Department, University of Waterloo. E2-3357
Communication and Microwave Area Laboratory Instructor.
(519)888-4567, x3716, FAX: (519)746-3077
URL: http://www.ece.uwaterloo.ca/~spike
IEEE Student Branch Computer Chapter Advisor,
Amateur Radio - Emergency Services Committee Chair for KW ARC Inc.
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Message is in Reply To:
 | | Cheap air flow sensor
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| Does anyone know of a cheap way to construct an air flow sensor? I was looking for an article in EDN on using a self-heated transistor to measure airflow, but Ican't find it. I was also wanting to know if there is a way to create a humidity sensor, (...) (26 years ago, 15-Jun-98, to lugnet.robotics.handyboard)
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