Xref: utzoo sci.electronics:4393 rec.models.rc:1108 Path: utzoo!utgpu!watmath!clyde!att!pacbell!ames!mailrus!ncar!boulder!tramp!ciciora From: ciciora@tramp.Colorado.EDU (Ciciora; Steven joseph) Newsgroups: sci.electronics,rec.models.rc Subject: Re: pressure transducers Keywords: airspeed, R/C models Message-ID: <5084@boulder.Colorado.EDU> Date: 6 Dec 88 04:01:43 GMT References: <848@earvax.UUCP> <2810@kitty.UUCP> Sender: news@boulder.Colorado.EDU Reply-To: ciciora@tramp.Colorado.EDU (Ciciora) Distribution: na Organization: University of Colorado, Boulder Lines: 22 In article <2810@kitty.UUCP> larry@kitty.UUCP (Larry Lippman) writes: >In article <848@earvax.UUCP>, sbcd@earvax.UUCP (Scott Dynes) writes: >> I'm looking for help on the following: I would like to get/make an >> airspeed sensor for R/C models. This would require 1) a small >> accurate (and light!) pressure sensor that would run off a small set >> of batteries, and 2) a similarly small, light, low-power way to get >> the information down to earth. I'm thinking of having the output be >> a tone whose frequency is proportional to the airspeed. Does anyone >> know of such a system, or where to look for the individual pieces? -a) Bust a small light bulb. -b) Run a constant current through it. -c) Measure the voltage accross it vs air speed. I once wanted to measure air speed and this was the method sugested. Never really calabrated it, though. Not sure how. It was interesting to send the output to a O'scope and look at the fluctuations of a fan, person walking by, blowing, etc. Made a nice lunch-break hack. Hope this helps, Steven Ciciora