Alt-BEAM Archive
Message #01548
To: Victor Snesarev vsn@eel.ufl.edu
From: Steven Bolt sbolt@xs4all.nl
Date: Tue, 16 Mar 1999 20:01:26 +0100 (CET)
Subject: [alt-beam] Re: `Green Thumb'
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 #
----------------------------------------------------------------------
------------------------------------------------------------------------
eGroup home: http://www.eGroups.com/list/alt-beam
Free Web-based e-mail groups by eGroups.com
Home