Re: Re: Moisture

[Jamie Bennett <jamie.bennett@xxxxxxxxx>]

It may be poo-poo'ed but I saw one of their hobby kits when I was
in=20=20
Maplin's yesterday that may do this. From the website:

"If the resistance of the soil (dependent on its moisture
content)=20=20
drops below a pre-set level, an LED flashes to indicate the plant=20=20
needs watering".

You could take the input from the LED as a signal into HomeVision?=20=20
Maybe worth a try for =A35?

http://www.maplin.co.uk/Module.aspx?ModuleNo=3D219974

Regards,
Jamie
--
http://www.linuxuk.org

On 22 May 2009, at 17:25, Bov wrote:

>
>
>
> So do you have to keep it constantly topped up with water for it
to=20=20
> work?
>
> --- In ukha_d@xxxxxxx, "Steve Morgan" <steve@...>
wrote:
> >
> > I've bought one of those (thank for the recommendation).
> >
> > Opened it up and it's basically a pressure switch that shorts
a=20=20
> resistor
> > across to terminals.
> >
> > You fill it up with water and, presumably, as the soil dries,
it=20=20
> tries to
> > 'suck' the water through a porous ceramic tip under
osmosis,=20=20
> reducing the
> > pressure.
> >
> > It should be simple enough to wire to virtually anything.
> >
> > Good find, Steve.
> >
> > Steve
> >
> >
> > -----Original Message-----
> > From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On=20=20
> Behalf Of
> > Steve
> > Sent: 19 May 2009 10:23
> > To: ukha_d@xxxxxxx
> > Subject: [ukha_d] Re: Moisture
> >
> > --- In ukha_d@xxxxxxx, "Bov" <bov@> wrote:
> > >
> > >
> > > What is the best way to measure soil moisture using a
HomeVision=20=20
> unit?
> > Anyone tried this and have recommendations? I want to adapt
my=20=20
> garden
> > watering schedule when the ground is already damp to save on
water.
> > >
> > > Cheers.
> > >
> > > Bov.
> > >
> >
> > Have you considered a hack of one of the moisture sensors
from=20=20
> Gardena
> > automatic watering systems?
> >
> > eg: http://tinyurl.com/r3tmpu ? (it isn't
my auction!)
> >
> > Steve
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
> > Checked by AVG - www.avg.com
> > Version: 8.5.339 / Virus Database: 270.12.32/2118 - Release
Date:=20=20
> 05/18/09
> > 17:55:00
> >
>
>
>=20



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