TIP: Click on subject to list as thread! ANSI
echo: science
to: Jasen Betts
from: mark lewis
date: 2004-07-13 13:51:46
subject: Relative Humidity

DW>> kind of strip with paper glued to metal), and hook a small
 DW>> potentiometer to it, so the resistance will change with the
 DW>> humidity. Then digitize the signal and feed it into your
 DW>> computer.

 JB> a regular potentiometer will have too much friction to get a
 JB> good reading

not to mention that the common ones are audio taper and not linear taper :(


this is audio taper (roughly)...


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this is linear taper...

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linear is much harder to manufacture...

)\/(ark

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