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Invisiblenoxy
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Thermoelectric cooler/warmer Advanced TEK
    #3240680 - 10/10/04 11:37 PM (13 years, 2 months ago)

Im wondering if there is enough interest out there to warrent
putting together an advanced tek explaining the construction
of an environmental chamber using a thermoelectric cooler/warmer,
advanced electronic construction and programing using a Basic Stamp
microcontroller.
Its a project Ive been working on and will put all my documentation
together in a way that might make sense if there is enough interest.


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OfflineCryogeniczV
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: noxy]
    #3241249 - 10/11/04 01:51 AM (13 years, 2 months ago)

Why not just use thermostats... much easier.


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Offlinemorian
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: Cryogenicz]
    #3241368 - 10/11/04 02:14 AM (13 years, 2 months ago)

Thermoelectric would be super cool, and with a microcontroller interface you have the opportunity to log data and hook into a PC for remote access over the internet. WAY COOLER than a thermostat cryo.

Lets see what you got noxy, I wouldn't personally use a basic stamp (maybe a microchip pic) but I'd be very interested in seeing everything you've got in terms of IO and digital interface.


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InvisibleSam1912
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: morian]
    #3241420 - 10/11/04 02:28 AM (13 years, 2 months ago)

Most of what you need are already available if you want to invest in a bit of money into it. The technology for remote monitoring and control via computer is available for under couple of hundred bucks. I have my whole house rigged with it so every lights, stereo, AC, etc. can be controlled using remote control or from my wife's computer. It's called X10. Skip through all the cameras and you'll find all the gizmos you need.

Sam


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Invisiblenotsloth
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: Sam1912]
    #3243734 - 10/11/04 05:26 PM (13 years, 2 months ago)

I'd be interested in any info on cooling a fruiting chamber.

I'm not as concerned with automation side of things as much as just the basics of how its done. Has anyone had any experience with this, or can point me towards the relevant resources ?

EDIT:
I've changed my mind.

After browsing the web for a while and coming across some very cool automation projects, I've decided I want one for myself. Any and all info you could provide on EITHER subject would be most appreciated. :smile:


Edited by notsloth (10/11/04 09:50 PM)


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Offlinewds
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: notsloth]
    #3245952 - 10/12/04 02:12 AM (13 years, 2 months ago)

are ya'll talking about incorporating peltier chips?


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Invisiblenotsloth
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: noxy]
    #3246713 - 10/12/04 11:56 AM (13 years, 2 months ago)

That was how I was planning to do it, yeah :smile:

At the moment though, I'm still just trying to work out how it'd all go together, so any info from someone who has some practical experience would be great. I was able to find 2 options, a Swiftech CPU Cooler that costs about $100, or these little things which are looking promising, assuming I could work out how to use them.

I figure if I'm gonna be messing around with a soldering iron in order to make the peltiers work, I might aswell automate at the same time :smile:

Labjack looks promising, but at $100 for the basic unit its a little expensive, and I'd still have to build or purchase relays ?


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InvisibleSam1912
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: notsloth]
    #3246736 - 10/12/04 12:10 PM (13 years, 2 months ago)

Ask the guys at X10 about automation. They'll help you come up with ideas.

Sam


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Invisiblenotsloth
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: Sam1912]
    #3246868 - 10/12/04 12:57 PM (13 years, 2 months ago)

I did have a quick look at X10, but they were so busy trying to sell me spy cams and making me look at adverts (when I was already on their site) that I was unable to find any actual information about that their products are, and what they can do. I got frustrated and left.

Presumably theres X10 Temp/RH sensors, I'd assume that would be pretty common .. But is there an X10 thermoelectric heater/cooler ?

The budget committee (comprising solely of my lovely wife) has set the budget for this project at $200, so cost is another factor that might work against an X10 system :smile:


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Offlinediscman1
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: notsloth]
    #3246881 - 10/12/04 01:03 PM (13 years, 2 months ago)

Very good idea. Don't buy it from Swiftech, way overpriced. The peltier you linked is only 9$. :wink:

The most important thing is getting adequate heat sinks. Heating/cooling will be greatly compromised if either side can't dissipate it's heat/cold.

Keep us updated! I have been trying to find a cheap, reliable thermostat to control electronic devices for a long time.


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Invisiblenoxy
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: discman1]
    #3247142 - 10/12/04 02:11 PM (13 years, 2 months ago)

Well, I started with a cooler / warmer like a coleman but it was an older unit. It uses a peltier device. I first rewired it, using a
heating/cooling thermistat. Humidity was supplied with a "TropicAir"
which is for a reptile terarium. Simple device really, an air pump pumping air into a resivoir of water and its output feeding the
cooler through tubing.

By utilizing a Basic Stamp and a few Dallas single wire addresable devices. I replaced the thermostat with a temp/humidity sensor, turn on heat or cool depending on what part of the grow cycle i am in.
The automation is great, just let it go. Data logging is possable.
I used a Basic Stamp because i had one available. I am working on schematics now, and the program is really very simple.

check out parallax.com for basic stamp info


Edited by noxy (10/12/04 02:24 PM)


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Invisiblenotsloth
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: noxy]
    #3247406 - 10/12/04 03:18 PM (13 years, 2 months ago)

>> The most important thing is getting adequate heat sinks.

I was thinking of using some leftover Swiftech watercooling gear - I have a nice copper waterblock and pump spare. I was planning on sandwiching that cheap peltier between the waterblock and a big passive heatsink. I figure if the pump moves water between the peltier/waterblock and a tub-in-tub PMP then I should be able to use the peltier to heat/cool as needed. My biggest concern though is the electronics that would control the peltier. I was intimidated by the basic stamp due to my complete lack of electronics knowledge :smile:

Anxiously awaiting Noxy's schematics!


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Invisiblenoxy
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: notsloth]
    #3247672 - 10/12/04 05:03 PM (13 years, 2 months ago)

The peltier chip uses a 12 volt 4 amp power supply
quite simple black (negitive) to Black and red (positive) to red
one side of the chip will heat the other will cool
to reverse the heat flow just reverse the polarity
(black to red......etc)
the copper water block sounds like it will work fine
the other side of the peltier chip will also need a heat sink and a fan

I will post schematics soon


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OfflineAnand
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: noxy]
    #3365505 - 11/15/04 07:57 PM (13 years, 30 days ago)

Quote:

noxy said:
The peltier chip uses a 12 volt 4 amp power supply
quite simple black (negitive) to Black and red (positive) to red
one side of the chip will heat the other will cool
to reverse the heat flow just reverse the polarity
(black to red......etc)
the copper water block sounds like it will work fine
the other side of the peltier chip will also need a heat sink and a fan

I will post schematics soon




Any updates?


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Offlinediscman1
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: Anand]
    #3365523 - 11/15/04 08:00 PM (13 years, 30 days ago)

I still have it in mind. I just don't have any extra money to experiment right now. :frown:

Damn bills...


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OfflineAnand
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: discman1]
    #3365645 - 11/15/04 08:18 PM (13 years, 30 days ago)

I have been thinking about using a Computer Bong cooler:

http://www.overclockers.com/articles389/

http://www.subzerotech.com/index/module/sz_articles_display/id/2/page/3

Normally they are used for overclocking and stuff but since they cool the water to under room temps they might be great for indoor Azure or Ps Cyan. With a small radiator fitted at the other end blowing cool air into my growroom without bringing in contams.


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InvisiblePeterthinks
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Registered: 11/10/04
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: Anand]
    #3365765 - 11/15/04 08:37 PM (13 years, 30 days ago)

This is going on in another thread about a stealth grow chamber
-------snip-----------
Build it into an old gutted computer tower case you'll have room for a light too to fruit them.Nobody will ever look in it.
and just keep it in the closet.
loads of ideas...has a power supply for led lights...pieltzer cooler on mother board...fan
Hmmmm....
block the holes so the light doesn't show or pretend it's wired up call it an independant server and tell everyone it has case lighting inside.
-------snip------------
thought you'd be interested


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Edited by Peterthinks (11/15/04 08:38 PM)


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OfflineFirstAvailable
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Re: Thermoelectric cooler/warmer Advanced TEK [Re: Anand]
    #3366827 - 11/16/04 12:17 AM (13 years, 29 days ago)

Evaporative (bong) coolers do not reduce water temps to below ambient temp.

Assuming 100% efficiency, you will get water temps that are equal to ambient temps. Usually you get slightly higher than ambient.


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