Subject:
|
Re: Cheap air flow sensor
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Mon, 15 Jun 1998 19:56:44 GMT
|
Original-From:
|
ED Spike, E&CE Dept. <spike@eestaff.watstar.uwaterloo.ca!Spamless!>
|
Viewed:
|
1518 times
|
| |
|
|
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.
----------------------------------------------------------------------
|
|
Message is in Reply To:
 | | Cheap air flow sensor
|
| 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)
|
6 Messages in This Thread:
 
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
