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Re: [Distillers] Re: Automation and ARC

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  • Andrew Forsberg
    There are thermostats that come with straps to fit them snugly to pipes. The models I ve seen aren t that accurate. Typically +-2degC. Still, low enough down
    Message 1 of 11 , May 31, 2005
      There are thermostats that come with straps to fit them snugly to pipes.
      The models I've seen aren't that accurate. Typically +-2degC. Still, low
      enough down the column they'd do the trick. One of those would easily
      trigger a solenoid on its own without the need for a relay. I remember
      finding one model in particular on NZ's RS electronics site. It wasn't
      overly expensive -- in the $30 region. I'm afraid I got sidetracked by
      house renovations before I could give it a go.

      My plan is to either write a java app to control one or more DS 18b20s
      from a blackberry via the onewire interface, or to preconfigure the
      thermostat variants of the 18b20 and let them control the whole
      distilling operation automagically. Ideally it'd be great to have both.
      i.e., to be able to 'dock' with one's still, check operations, fine tune
      settings, then remove the computer from the equation and leave the
      components to carry on with the new instructions.

      Anyhow -- I'm sure a good sparky could come up with a diagram for your
      steak thermometer + relay + solenoid idea! Sounds cheap, easy, and
      probably extremely reliable.


      On Tue, 2005-05-31 at 10:17 +0000, abbababbaccc wrote:
      > Another thing, you could probably use steak thermometer with alarm as
      > a controller. Just figure out a way to use the alarm signal to
      > trigger the solenoid to close the valve :) Oh, and let me know if you
      > do figure out that.
      > - Riku
      > --- In Distillers@yahoogroups.com, Andrew Forsberg <andrew@u...>
      > wrote:
      > > Hey Riku,
      > >
      > > I'm good! Busy, but good. How's it going up North? I do have a
      > number of
      > > questions for you regarding your latest ARC theory and experiments,
      > but
      > > first I need to set my mind at rest re: a few water bath issues...
      > > Anyway.
      > >
      > > You're probably right about the solenoids. What worried me was the
      > > sparks that fly from the clips to the terminals when I tested the
      > > solenoid valves. I'd have to dig the valves out and check, but I
      > think
      > > they are 6V, normally closed, and designed for petrol engine use.
      > As you
      > > can guess, I'm neither an electrical expert or a mechanical
      > expert...
      > > But I do enjoy worrying an idea to the bitter end. :>
      > >
      > > I think the models I have are designed to be mounted to an earthed
      > or
      > > neutral rail. That sounds like a great idea to me. Also, I'm pretty
      > sure
      > > there wouldn't be any sparking once the circuit was closed.
      > Otherwise
      > > they'd definitely be a problem for any petrochemical application...
      > >
      > > Butterfly valves look fabulous! Don't think I've ever seen anything
      > like
      > > that before. Super! They appear to have all the advantages of a gate
      > > valve, but without suffering from the sticking and knocking
      > problems the
      > > gate valves have at near open or near closed states. They look like
      > > they'd fit in VERY nicely with common VM still designs too.
      > >
      > > Might be a bit hard finding a solenoid with an ID large enough to
      > match
      > > though. Or not?
      > >
      > > Cheers
      > > Andrew
      > >
      > >
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