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Date: 08 May 2007 19:49:57
From: Robert Harmon
Subject: I need a way to open & close a solenoid activated valve at 1 - 5 second intervals.
The subject pretty well defines my quest. "I need a way to open & close a
solenoid activated valve at 1 - 5 second intervals."

Here's some background; I bought a thermoblock to generate steam. I'd like
to mount a valve (solenoid?) between the water mains &
the thermoblock that can be opened/closed at varying intervals. Can someone
point me toward a VERY cheap way to do this?

Robert (I think when I tinker & tinkle when I drink!) Harmon
--
http://www.tinyurl.com/mb4uj - My coffee pages.
http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
http://www.tinyurl.com/2cr3e2 - I have things for sale here.






 
Date: 09 May 2007 12:32:01
From: Jack Denver
Subject: Re: I need a way to open & close a solenoid activated valve at 1 - 5 second intervals.
If you are driving off mains pressure instead of using the vibe pump I
wonder if a pulsed solenoid is really best or even necessary. First of all
one second pulses may flood the thermoblock. I recall from my old Krups
thermoblock that the pump was pulsed on and off very briefly (but
frequently) in less than one second pulses, at maybe 4Hz.

Maybe what would work better (and cheaper) is some kind of needle valve that
would let a constant trickle or drip drip into the block?

"Robert Harmon" <r_h_harmon@Zhotmail.com > wrote in message
news:Fv40i.7979$Ut6.722@newsread1.news.pas.earthlink.net...
> The subject pretty well defines my quest. "I need a way to open & close a
> solenoid activated valve at 1 - 5 second intervals."
>
> Here's some background; I bought a thermoblock to generate steam. I'd like
> to mount a valve (solenoid?) between the water mains &
> the thermoblock that can be opened/closed at varying intervals. Can
> someone point me toward a VERY cheap way to do this?
>
> Robert (I think when I tinker & tinkle when I drink!) Harmon
> --
> http://www.tinyurl.com/mb4uj - My coffee pages.
> http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
> http://www.tinyurl.com/2cr3e2 - I have things for sale here.
>
>
>




  
Date: 09 May 2007 16:56:13
From: Robert Harmon
Subject: Re: I need a way to open & close a solenoid activated valve at 1 - 5 second intervals.

Howdy Jack!
I hadn't thought of using a drip mechanism but I'll give it a try. I also
have a design for a small motor, cam, & micro-switch setup that someone
gave me.

As usual, I probably looked for the most 'elegant' (read: complex) solution
first. Typical Aggie 'til the day I die! The timer I'm looking at has a
"Maximum Time Range 10 seconds, Minimum Time Range .1 Seconds", which I
hope will be sufficient.

Robert (We don't need no stinkin' KISS principle!) Harmon
--
http://www.tinyurl.com/mb4uj - My coffee pages.
http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
http://www.tinyurl.com/2cr3e2 - I have things for sale here.

Remove "ZED" from address if replying by email.

"Jack Denver" <nunuvyer@netscape.net > wrote in
news:RemdnfkiPt0catzbnZ2dnUVZ_ualnZ2d@comcast.com:

> If you are driving off mains pressure instead of using the vibe pump I
> wonder if a pulsed solenoid is really best or even necessary. First
> of all one second pulses may flood the thermoblock. I recall from my
> old Krups thermoblock that the pump was pulsed on and off very briefly
> (but frequently) in less than one second pulses, at maybe 4Hz.
>
> Maybe what would work better (and cheaper) is some kind of needle
> valve that would let a constant trickle or drip drip into the block?
>
> "Robert Harmon" <r_h_harmon@Zhotmail.com> wrote in message
> news:Fv40i.7979$Ut6.722@newsread1.news.pas.earthlink.net...
>> The subject pretty well defines my quest. "I need a way to open &
>> close a solenoid activated valve at 1 - 5 second intervals."
>>
>> Here's some background; I bought a thermoblock to generate steam. I'd
>> like to mount a valve (solenoid?) between the water mains &
>> the thermoblock that can be opened/closed at varying intervals. Can
>> someone point me toward a VERY cheap way to do this?
>>
>> Robert (I think when I tinker & tinkle when I drink!) Harmon
>> --
>> http://www.tinyurl.com/mb4uj - My coffee pages.
>> http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
>> http://www.tinyurl.com/2cr3e2 - I have things for sale here.
>>
>>
>>
>
>
>


 
Date: 09 May 2007 06:38:03
From: Dave b
Subject: Re: I need a way to open & close a solenoid activated valve at 1 - 5 second intervals.
On May 8, 4:22 pm, Randall Nortman <usenet8...@wonderclown.com > wrote:
> On 2007-05-08, Robert Harmon <r_h_har...@Zhotmail.com> wrote:
>
> > The subject pretty well defines my quest. "I need a way to open & close a
> > solenoid activated valve at 1 - 5 second intervals."
>
> > Here's some background; I bought a thermoblock to generate steam. I'd like
> > to mount a valve (solenoid?) between the water mains &
> > the thermoblock that can be opened/closed at varying intervals. Can someone
> > point me toward a VERY cheap way to do this?
>
> How cheap is "VERY cheap"? The solenoid itself can be pretty cheap,
> especially if it's going to be passing cold water. You can find these
> from appliance parts stores, as they're found in refrigerators with
> automatic ice makers. They're all over eBay for less than $10. The
> ones that can deal with hot water are found in dishwashers and are
> probably a little more expensive. Make sure also that the valve will
> pass the volume of water you require (which is a function of pipe
> diameter).
>
> Then you'll need a circuit to drive it. Are you handy with
> electronics? An old-school "555" timer, plus a potentiometer for
> cycle adjustment and a relay to drive the solenoid, and you're in
> business. You could even do a simple RC (resistor-capacitor) timing
> circuit, with the pot as the resistor, since it sounds like precision
> is probably not required. Could easily be < $20 in parts, all
> available at your local RadioShack. If none of that made sense to
> you, then you don't have the electronics know-how to DIY, and you'll
> need to find a ready-made controller of some sort. That probably
> won't be cheap.
>
> --
> Randall

LOVE the 555!!

dave



 
Date: 08 May 2007 18:48:40
From: Dan Bollinger
Subject: Re: I need a way to open & close a solenoid activated valve at 1 - 5 second intervals.
> The subject pretty well defines my quest. "I need a way to open & close a
> solenoid activated valve at 1 - 5 second intervals."

Use an interval or repeat cycle timer, about $55-70. See www.grainger.com

Dan


  
Date: 08 May 2007 23:14:53
From: Robert Harmon
Subject: Re: I need a way to open & close a solenoid activated valve at 1 - 5 second intervals.
Howdy Dan!
I'm ashamed to admit that I slept through the requisite courses in
electronics. Is this what you meant?
http://tinyurl.com/2ahzxd

http://tinyurl.com/2345th

Robert (Who you callin' cheap?) Harmon
--
http://www.tinyurl.com/mb4uj - My coffee pages.
http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
http://www.tinyurl.com/2cr3e2 - I have things for sale here.

Remove "ZED" from address if replying by email.
"Dan Bollinger" <danNObollinger@insightSPAMbb.com > wrote in message
news:956dnd1wr_PJY93bnZ2dnUVZ_jOdnZ2d@insightbb.com...
>> The subject pretty well defines my quest. "I need a way to open & close a
>> solenoid activated valve at 1 - 5 second intervals."
>
> Use an interval or repeat cycle timer, about $55-70. See www.grainger.com
> Dan




   
Date: 08 May 2007 21:25:01
From: Dan Bollinger
Subject: Re: I need a way to open & close a solenoid activated valve at 1 - 5 second intervals.
That looks like an on-delay timer. It doesn't say what amps and volts it will
power. What you want is something that repeats. In essence you need a double
timer, one that waits to turn the solenoid on, and one that then waits to turn
it off.

Another type is a percentage timer.

http://www.grainger.com/Grainger/categories/electrical/relays/time-delay-relays







"Robert Harmon" <r_h_harmon@Zhotmail.com > wrote in message
news:Nv70i.9241$j63.8671@newsread2.news.pas.earthlink.net...
> Howdy Dan!
> I'm ashamed to admit that I slept through the requisite courses in
> electronics. Is this what you meant?
> http://tinyurl.com/2ahzxd
>
> http://tinyurl.com/2345th
>
> Robert (Who you callin' cheap?) Harmon
> --
> http://www.tinyurl.com/mb4uj - My coffee pages.
> http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
> http://www.tinyurl.com/2cr3e2 - I have things for sale here.
>
> Remove "ZED" from address if replying by email.
> "Dan Bollinger" <danNObollinger@insightSPAMbb.com> wrote in message
> news:956dnd1wr_PJY93bnZ2dnUVZ_jOdnZ2d@insightbb.com...
>>> The subject pretty well defines my quest. "I need a way to open & close a
>>> solenoid activated valve at 1 - 5 second intervals."
>>
>> Use an interval or repeat cycle timer, about $55-70. See www.grainger.com
>> Dan
>
>



    
Date: 09 May 2007 02:53:31
From: Robert Harmon
Subject: Re: I need a way to open & close a solenoid activated valve at 1 - 5 second intervals.
Howdy Dan!
I appreciate your input. This time is a repeat model:
http://tinyurl.com/yosm3e. I'm doing this mod on the cheap so I'd prefer to
pick it up on eBay.

Robert Harmon
--
http://www.tinyurl.com/mb4uj - My coffee pages.
http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
http://www.tinyurl.com/2cr3e2 - I have things for sale here.

Remove "ZED" from address if replying by email.
"Dan Bollinger" <danNObollinger@insightSPAMbb.com > wrote in message
news:esGdnbkErfZnv9zbnZ2dnUVZ_r6vnZ2d@insightbb.com...
> That looks like an on-delay timer. It doesn't say what amps and volts it
> will power. What you want is something that repeats. In essence you need a
> double timer, one that waits to turn the solenoid on, and one that then
> waits to turn it off.
>
> Another type is a percentage timer.
>
> http://www.grainger.com/Grainger/categories/electrical/relays/time-delay-relays
>
>
>
>
>
>
>
> "Robert Harmon" <r_h_harmon@Zhotmail.com> wrote in message
> news:Nv70i.9241$j63.8671@newsread2.news.pas.earthlink.net...
>> Howdy Dan!
>> I'm ashamed to admit that I slept through the requisite courses in
>> electronics. Is this what you meant?
>> http://tinyurl.com/2ahzxd
>>
>> http://tinyurl.com/2345th
>>
>> Robert (Who you callin' cheap?) Harmon
>> --
>> http://www.tinyurl.com/mb4uj - My coffee pages.
>> http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
>> http://www.tinyurl.com/2cr3e2 - I have things for sale here.
>>
>> Remove "ZED" from address if replying by email.
>> "Dan Bollinger" <danNObollinger@insightSPAMbb.com> wrote in message
>> news:956dnd1wr_PJY93bnZ2dnUVZ_jOdnZ2d@insightbb.com...
>>>> The subject pretty well defines my quest. "I need a way to open & close
>>>> a solenoid activated valve at 1 - 5 second intervals."
>>>
>>> Use an interval or repeat cycle timer, about $55-70. See
>>> www.grainger.com
>>> Dan
>>
>>
>




     
Date: 09 May 2007 08:47:43
From: Dan Bollinger
Subject: Re: I need a way to open & close a solenoid activated valve at 1 - 5 second intervals.
Oops. I didn't see, the seller will add an octal base for $2.50.


"Robert Harmon" <r_h_harmon@Zhotmail.com > wrote in message
news:LIa0i.13121$3P3.9721@newsread3.news.pas.earthlink.net...
> Howdy Dan!
> I appreciate your input. This time is a repeat model:
> http://tinyurl.com/yosm3e. I'm doing this mod on the cheap so I'd prefer to
> pick it up on eBay.
>
> Robert Harmon
> --
> http://www.tinyurl.com/mb4uj - My coffee pages.
> http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
> http://www.tinyurl.com/2cr3e2 - I have things for sale here.
>
> Remove "ZED" from address if replying by email.
> "Dan Bollinger" <danNObollinger@insightSPAMbb.com> wrote in message
> news:esGdnbkErfZnv9zbnZ2dnUVZ_r6vnZ2d@insightbb.com...
>> That looks like an on-delay timer. It doesn't say what amps and volts it will
>> power. What you want is something that repeats. In essence you need a double
>> timer, one that waits to turn the solenoid on, and one that then waits to
>> turn it off.
>>
>> Another type is a percentage timer.
>>
>> http://www.grainger.com/Grainger/categories/electrical/relays/time-delay-relays
>>
>>
>>
>>
>>
>>
>>
>> "Robert Harmon" <r_h_harmon@Zhotmail.com> wrote in message
>> news:Nv70i.9241$j63.8671@newsread2.news.pas.earthlink.net...
>>> Howdy Dan!
>>> I'm ashamed to admit that I slept through the requisite courses in
>>> electronics. Is this what you meant?
>>> http://tinyurl.com/2ahzxd
>>>
>>> http://tinyurl.com/2345th
>>>
>>> Robert (Who you callin' cheap?) Harmon
>>> --
>>> http://www.tinyurl.com/mb4uj - My coffee pages.
>>> http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
>>> http://www.tinyurl.com/2cr3e2 - I have things for sale here.
>>>
>>> Remove "ZED" from address if replying by email.
>>> "Dan Bollinger" <danNObollinger@insightSPAMbb.com> wrote in message
>>> news:956dnd1wr_PJY93bnZ2dnUVZ_jOdnZ2d@insightbb.com...
>>>>> The subject pretty well defines my quest. "I need a way to open & close a
>>>>> solenoid activated valve at 1 - 5 second intervals."
>>>>
>>>> Use an interval or repeat cycle timer, about $55-70. See www.grainger.com
>>>> Dan
>>>
>>>
>>
>
>



     
Date: 09 May 2007 08:47:08
From: Dan Bollinger
Subject: Re: I need a way to open & close a solenoid activated valve at 1 - 5 second intervals.
Yes, that will work. It is the same sort of unit I was pointing to at Grainger.
It's the two knobs that are the give away. One for the on-delay and one for the
off-delay. Keep in mind that the maximum time the solenoid can be off is 10
seconds and the minimum time it can be on is 1 second (and vice-versa). It that
will work for you might be able to pick it up for 1/3 the price. Note that you
will have to provide a 24VDC power supply to run the timer. The 10 amp contacts
will power your 110VAC solenoid just fine. You will need an Octal base (socket
with 8 pins). You can buy those at an electronic supply house or Grainger.

What the heck are you building anyway?

Dan


"Robert Harmon" <r_h_harmon@Zhotmail.com > wrote in message
news:LIa0i.13121$3P3.9721@newsread3.news.pas.earthlink.net...
> Howdy Dan!
> I appreciate your input. This time is a repeat model:
> http://tinyurl.com/yosm3e. I'm doing this mod on the cheap so I'd prefer to
> pick it up on eBay.
>
> Robert Harmon
> --
> http://www.tinyurl.com/mb4uj - My coffee pages.
> http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
> http://www.tinyurl.com/2cr3e2 - I have things for sale here.
>
> Remove "ZED" from address if replying by email.
> "Dan Bollinger" <danNObollinger@insightSPAMbb.com> wrote in message
> news:esGdnbkErfZnv9zbnZ2dnUVZ_r6vnZ2d@insightbb.com...
>> That looks like an on-delay timer. It doesn't say what amps and volts it will
>> power. What you want is something that repeats. In essence you need a double
>> timer, one that waits to turn the solenoid on, and one that then waits to
>> turn it off.
>>
>> Another type is a percentage timer.
>>
>> http://www.grainger.com/Grainger/categories/electrical/relays/time-delay-relays
>>
>>
>>
>>
>>
>>
>>
>> "Robert Harmon" <r_h_harmon@Zhotmail.com> wrote in message
>> news:Nv70i.9241$j63.8671@newsread2.news.pas.earthlink.net...
>>> Howdy Dan!
>>> I'm ashamed to admit that I slept through the requisite courses in
>>> electronics. Is this what you meant?
>>> http://tinyurl.com/2ahzxd
>>>
>>> http://tinyurl.com/2345th
>>>
>>> Robert (Who you callin' cheap?) Harmon
>>> --
>>> http://www.tinyurl.com/mb4uj - My coffee pages.
>>> http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
>>> http://www.tinyurl.com/2cr3e2 - I have things for sale here.
>>>
>>> Remove "ZED" from address if replying by email.
>>> "Dan Bollinger" <danNObollinger@insightSPAMbb.com> wrote in message
>>> news:956dnd1wr_PJY93bnZ2dnUVZ_jOdnZ2d@insightbb.com...
>>>>> The subject pretty well defines my quest. "I need a way to open & close a
>>>>> solenoid activated valve at 1 - 5 second intervals."
>>>>
>>>> Use an interval or repeat cycle timer, about $55-70. See www.grainger.com
>>>> Dan
>>>
>>>
>>
>
>



      
Date: 09 May 2007 13:07:22
From: Robert Harmon
Subject: Re: I need a way to open & close a solenoid activated valve at 1 - 5 second intervals.
Howdy Dan!
I'm stealing the idea from the Baby Twin & adding a thermoblock to a
Gaggia Classic. It already had a direct plumb connection (mains to the
pump with a pressure regulator & a solenoid activated valve) so the water
to the TB will be continuous feed, thus the need for the timer..

I want the solenoid valve to interrupt the water flow so the TB can
generate steam. This particular Classic is one I helped a friend cobble
together. Between the two of us & a bottle of 20 YO single-malt, nothing
is safe or sacred.

Robert (Not every idea has to be a great idea!) Harmon
--
http://www.tinyurl.com/mb4uj - My coffee pages.
http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
http://www.tinyurl.com/2cr3e2 - I have things for sale here.

Remove "ZED" from address if replying by email.



"Dan Bollinger" <danNObollinger@insightSPAMbb.com > wrote in
news:GfKdnRShEONFX9zbnZ2dnUVZ_sSmnZ2d@insightbb.com:

> Yes, that will work. It is the same sort of unit I was pointing to at
> Grainger. It's the two knobs that are the give away. One for the
> on-delay and one for the off-delay. Keep in mind that the maximum
> time the solenoid can be off is 10 seconds and the minimum time it can
> be on is 1 second (and vice-versa). It that will work for you might be
> able to pick it up for 1/3 the price. Note that you will have to
> provide a 24VDC power supply to run the timer. The 10 amp contacts
> will power your 110VAC solenoid just fine. You will need an Octal base
> (socket with 8 pins). You can buy those at an electronic supply house
> or Grainger.
>
> What the heck are you building anyway?
>
> Dan
>
>
> "Robert Harmon" <r_h_harmon@Zhotmail.com> wrote in message
> news:LIa0i.13121$3P3.9721@newsread3.news.pas.earthlink.net...
>> Howdy Dan!
>> I appreciate your input. This time is a repeat model:
>> http://tinyurl.com/yosm3e. I'm doing this mod on the cheap so I'd
>> prefer to pick it up on eBay.
>>
>> Robert Harmon
>> --
>> http://www.tinyurl.com/mb4uj - My coffee pages.
>> http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
>> http://www.tinyurl.com/2cr3e2 - I have things for sale here.
>>
>> Remove "ZED" from address if replying by email.
>> "Dan Bollinger" <danNObollinger@insightSPAMbb.com> wrote in message
>> news:esGdnbkErfZnv9zbnZ2dnUVZ_r6vnZ2d@insightbb.com...
>>> That looks like an on-delay timer. It doesn't say what amps and
>>> volts it will power. What you want is something that repeats. In
>>> essence you need a double timer, one that waits to turn the solenoid
>>> on, and one that then waits to turn it off.
>>>
>>> Another type is a percentage timer.
>>>
>>> http://www.grainger.com/Grainger/categories/electrical/relays/time-de
>>> lay-relays
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> "Robert Harmon" <r_h_harmon@Zhotmail.com> wrote in message
>>> news:Nv70i.9241$j63.8671@newsread2.news.pas.earthlink.net...
>>>> Howdy Dan!
>>>> I'm ashamed to admit that I slept through the requisite courses in
>>>> electronics. Is this what you meant?
>>>> http://tinyurl.com/2ahzxd
>>>>
>>>> http://tinyurl.com/2345th
>>>>
>>>> Robert (Who you callin' cheap?) Harmon
>>>> --
>>>> http://www.tinyurl.com/mb4uj - My coffee pages.
>>>> http://www.tinyurl.com/2tnv87 - My 'Guidelines For Newbies' page.
>>>> http://www.tinyurl.com/2cr3e2 - I have things for sale here.
>>>>
>>>> Remove "ZED" from address if replying by email.
>>>> "Dan Bollinger" <danNObollinger@insightSPAMbb.com> wrote in message
>>>> news:956dnd1wr_PJY93bnZ2dnUVZ_jOdnZ2d@insightbb.com...
>>>>>> The subject pretty well defines my quest. "I need a way to open &
>>>>>> close a solenoid activated valve at 1 - 5 second intervals."
>>>>>
>>>>> Use an interval or repeat cycle timer, about $55-70. See
>>>>> www.grainger.com Dan
>>>>
>>>>
>>>
>>
>>
>



 
Date: 08 May 2007 20:22:22
From: Randall Nortman
Subject: Re: I need a way to open & close a solenoid activated valve at 1 - 5 second intervals.
On 2007-05-08, Robert Harmon <r_h_harmon@Zhotmail.com > wrote:
> The subject pretty well defines my quest. "I need a way to open & close a
> solenoid activated valve at 1 - 5 second intervals."
>
> Here's some background; I bought a thermoblock to generate steam. I'd like
> to mount a valve (solenoid?) between the water mains &
> the thermoblock that can be opened/closed at varying intervals. Can someone
> point me toward a VERY cheap way to do this?

How cheap is "VERY cheap"? The solenoid itself can be pretty cheap,
especially if it's going to be passing cold water. You can find these
from appliance parts stores, as they're found in refrigerators with
automatic ice makers. They're all over eBay for less than $10. The
ones that can deal with hot water are found in dishwashers and are
probably a little more expensive. Make sure also that the valve will
pass the volume of water you require (which is a function of pipe
diameter).

Then you'll need a circuit to drive it. Are you handy with
electronics? An old-school "555" timer, plus a potentiometer for
cycle adjustment and a relay to drive the solenoid, and you're in
business. You could even do a simple RC (resistor-capacitor) timing
circuit, with the pot as the resistor, since it sounds like precision
is probably not required. Could easily be < $20 in parts, all
available at your local RadioShack. If none of that made sense to
you, then you don't have the electronics know-how to DIY, and you'll
need to find a ready-made controller of some sort. That probably
won't be cheap.

--
Randall