Hi Roman,
do those dew sensors measure RH or condensed moisture (wet tape)?
Allan

Roman Black wrote:
>
> Dale Botkin wrote:
> > I know, my $29 Radio Shack thermometer/hygrometer has a sensor in it that
> > could not possibly have cost more than $.50 in any sort of quantity.  All
> > I want is to sense temp and humidity in my humidor, feed it to a PIC and
> > keep it at the right temperature and humidity with a Peltier element.  is
> > that asking so much??  ;-)
>
> Hi Dale, I'm good at cheap solutions! ;o)
> Go see your local TV/VCR repairer, ask or beg for a
> "dew" sensor from just about ay old VCR. If he is friendly
> he will find one from an old scrapped VCR and probably
> donate it to you, or just charge a couple of bucks.
> They are resistive, about 1200 ohms at normal room
> humidity if I remember right.
> -Roman
>
> PS. If you can get an old scrapped VCR I can tell you
> where the sensor is, heck you can even pull the sensor
> from your own VCR and replace it with a resistor, most
> of the newer VCRs don't bother with a sensor anyway. It
> is one of those older "quality" features.
>
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