Rain Detector
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From: scilent-project on 29 May 2006 23:19 Hey u all , thank you very much for supporting me. I hav gone inside the problem and found something similar which you ppl suggested. How about achieve this by considering the way of fual level detection of auto mobiles ? (simply it's a floter with a potentiometer). And the bottem line It is recommended to implement the project with C++. (should be work under kernal and user mode OS in the samw way) Thanks a lot for your ideas.
From: Gerald Bonnstetter on 30 May 2006 14:44 Steve wrote: > On Mon, 29 May 2006 22:43:55 +0000 (UTC), Hul Tytus <ht(a)panix.com> > wrote: > > >>Steve - what are inverts? >> > > > Ah, a bit OT I guess, but invertebrates, as in non-vertebrate > organisms, include corals and other non-fish marine things - hence > the need for precise level (== water specific gravity) control to keep > them. Copper in greater than trace concentrations is highly toxic to > marine invertebrates, hence you need to avoid same in any electronics > in contact with aquarium saltwater. > > Steve How about trying two heavy gauge wires in glass or plastic tubing that is sealed on one end. Make two probes a couple of inches (5 cm or so) long and see how much capacitance you get with different spacings and water depths. The glass or plastic would make the metal choice irrelevant and will prevent electrolysis. If needed, you could go to a flat plate design by sealing the conductors between insulating material. Remember to use fish safe glues. Gerald Bonnstetter
From: Steve on 1 Jun 2006 13:16 On Tue, 30 May 2006 13:44:07 -0500, Gerald Bonnstetter <bonnsoft(a)anitspamstuffnetins.net> wrote: >If needed, you could go to a flat plate design by sealing the conductors >between insulating material. Remember to use fish safe glues. I like the flat plate idea, lots of capacitance, might go that way! Steve
From: Rocky on 1 Jun 2006 15:25 Steve wrote: > Ah, a bit OT I guess, but invertebrates, as in non-vertebrate > organisms, include corals and other non-fish marine things - hence > the need for precise level (== water specific gravity) control to keep > them. Copper in greater than trace concentrations is highly toxic to > marine invertebrates, hence you need to avoid same in any electronics > in contact with aquarium saltwater. I think the idea was that the copper was completely covered in insulating materials and conductive effects were used. Rocky
From: Everett M. Greene on 1 Jun 2006 18:53
"Oscar" <oscar(a)nospam.com> writes: > > For final year project,I want to design a rain measurement device which > > can be read through parelle port of a PC. > > All ideas on this topic are cordially welcome. > > > > thanks in advance. > > Look at web sites for commercial irrigation systems. Most of them have a > rain detector nowdays to prevent watering when its raining or has rained > recently. Get some ideas from them and then design a better one. > Conductivity through collected water and periodic cup dumping are common. Related topic: Some irrigation systems have ground moisture sensing so as to more precisely control when watering is performed. Anyone have any idea how this is done? I thought electrical conductivity would be a reasonable method until someone mentioned that the conductivity will change from fertilizing, etc. |