Re: Automatic watering

["Rob Lamb" <rjl@xxxxxxx>]

Tried that but to no avail. Can't think of what to do next!

Rob

--- In ukha_d@xxxxxxx, "Tim Fletcher" <timfletcher@b...>
wrote:
> reverse the polarity to close the valve?
>
>   ----- Original Message -----
>   From: Rob Lamb
>   To: ukha_d@xxxxxxx
>   Sent: Wednesday, December 03, 2003 11:48 AM
>   Subject: [ukha_d] Automatic watering
>
>
>   I need a little help with a new project. Up until now I've used
a
>   standalone Gardena water computer to control my irrigation
system
>   but as this now seems to have failed and I now also have
Homevision
>   I thought I try to control the valve part of the water computer.
>   Taking the water computer apart there are just a pair of wires
that
>   lead to what looks like an electromagnet on the valve. Connect
9V DC
>   to these leads (that's the same as the battery the computer
used)
>   and hey presto water flows through the valve. But here's the
>   problem. Disconnect the power and - the water still flows! Any
ideas
>   on what I'm doing wrong or what to do next?
>
>   Regards,
>
>   Rob
>
>
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