Alt-BEAM Archive
Message #01562
To: Steven Bolt sbolt@xs4all.nl, Victor Snesarev vsn@eel.ufl.edu
From: dennison dennlill@buffnet.net
Date: Tue, 16 Mar 1999 19:07:19 -0500
Subject: [alt-beam] Re: `Green Thumb'
Well, perhpas you don't even need a pump. What if the water supply was above
the pot, like haning from the celing or something. Then all you really would
need is a small valve. You CAN get VERY high quality valves, since they tend
to be used in so many sensitive applications. That would solve your problem.
You would only need to gather enough current to open the valve.
Dennison
>On Tue, 16 Mar 1999, Victor Snesarev wrote:
>
>> How about a solenoid (not sure of power requirements, but ought
>> to be less than 12 volts) pushing/pulling a plug of sorts? Maybe
>> not quite a plug, but a slab of plastic with a hole in it.
>---8<---
>> In the picture the solenoid is not pushing the slab; water flow
>> is interrupted. Once the solenoid pushes the slab, the hole
>> aligns with the water tube, and the water flows.
>
>You need to open the valve, and close it again after a certain
>amount of water has reached the plant. Might be more difficult than
>you think, especially since the valve must not be allowed to leak.
>
>Any system involving electromechanics, valves and water is likely
>to be about as complex as a pump, which has the advantage that it
>can use a reservoir on the floor.
>
>Best,
>
>Steve
>
> ----------------------------------------------------------------------
> # sbolt@xs4all.nl # Steven Bolt # popular science monthly KIJK #
> ----------------------------------------------------------------------
>
>
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