Re: Water control technology

Gardena manufactures a humidity sensor that, in conjunction with a computer box that sit's on your tap, regulates the water traffic.
dunno 'bout the temp. problem tho.
the humidity sensor is placed in the soil and thus triggers the water controller.
The Gardena water computer also can B programmed to operate at certain times.
Programmable up 2 16 cycles - depending on season.
Hope Gardena is available in the States or where-ever.
:-)
Cix
**SMILE**
PLUR


----------
> From: Mark Martinek <Always@home.com>
> To: Dan Shapiro <dgs@leland.stanford.edu>; Pumpkin Central <pumpkins@athenet.net>
> Subject: Re: technology
> Date: 12 November 1997 08:49
>
> Hi Dan,
>   I have been pondering the same problem myself for a while. Please let
> me know what you find out.
>   The only ideas that I have come up with are
>      1. locate an electronics whiz and make up a simple logic circuit
> that is tied in with an electronic thermometer and run it through some
> signal amplifiers to turn on and off the electronic valves at the
> poroper temperatures. The problem with this is that it is expensive and
> comlicated.
>      2. For my 7th grade science project I made a fire detecter. It
> consisted of a bell, a 6 volt lantern battery and a metal thermometer
> with a speedometer type needle. the way it worked was to drill a hole in
> the back of the thermometer at whatever temperature you wanted the alarm
> to go off at. then stuck a bare wire through at that point. that wire
> was then hooked up to the bell, the bell was hooked up to the battery
> and the battery was grounded to the base of the thermometer. When the
> needle reached the proper temperature the circuit was completed and the
> bell sounded. If no better ideas come up this is what I am going to try
> for my misters. I am going to set my automatic timers to come on in the
> morning and off in the evening but run the sprinkler wire through the
> thermometer so that they will only activate when the temperature is high
> enough.
>
> Wish me luck.
>
> Mark
>
>
> Dan Shapiro wrote:
> >
> > Here is a watering technology question:
> >
> > I'd like to set up a misting system for next year that automatically kicks
> > in in response to temperature in the patch.  Right now I am limited to your
> > regular 4 cycle a day timers.  Does anyone know what products are available
> > for this job?
> >
> >         Dan Shapiro

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