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Offlinemrlucretius
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is there interest in a temperature / humidity controller?
    #3844409 - 02/28/05 12:20 AM (11 years, 9 months ago)

Hello,

I searched far and wide for a low cost temperature / humidity controller device suitable for mushroom cultivation, but all solutions I found were very expensive and not easily applicable to a mushroom setup.

So, what I did was make one from scratch myself. Basically, it is a box that you plug into the wall, plug a heater into one outlet on the box, plug a humidifier into the other outlet, and attach the remote sensor to the final socket.

This allows for a very flexible setup, where most any humidifier and heater can be used. It seems to me that the main trouble with cultivation is temperature and humidity control. Thus, I imagine that there might be interest in a cheap humidity / temperature controller.

Here is the prototype (I am holding the wired sensor above the box):


However, the current cost for this device is about 160$ parts. I think that I could reduce this cost to $100 parts. So my question: Is there interest in a temperature / humidity controller that costs in the 150-200$ range? If this cost seems too high, it could be designed without an lcd, which costs ~40 of the parts. Please give me an idea what one might pay for this device, because then I can modify the design as best as possible to accomodate.

Please do not read this as a solicitation, but only as a request for comments. I think that the mycological community could benefit from a cheap humidity / temperature controller, and I am thinking of bringing this to public fruition. I certainly would have paid for this device had one been available when I needed it.

I am considering producing this device for sale, and if not, I will write up a detailed HOWTO, if there is interest. It is very accurate and fast. The temperature and humidity setting can be adjusted per degree, and what the box does is simply power on the heater or humidifier if the heat or humidity is too low, and turns them off if the heat or humidity is at or above the target level. Now my growing chamber stays at exactly the temperature and humidity I specify, thus allowing for brainless mushroom chambers. The last thing that I will implement is an exhaust system timer, that will allow a fan to be controlled on a certain cycle to do the fresh air exchanges needed at the fruiting cycle. That is what the little black plug in the bottom right of the picture is for. Currently it drives a 12vdc fan on a cycle to exchange the air on a 30 gallon aquarium 3 times per hour, so when the time is right in the growth cycle, you just plug in the fan and the air exchange is controlled and brainless.

So, the ultimate goal is to have air circulation, humidity, and temperature all controlled by one box, simply, not too expensive, and carefree.

What do you all think? Should I look into producing a retail version? Given the parts cost for this design, would anyone want to buy something like this in this price range? If not, how much would one want to pay for a device like this? Do you want a HOWTO to build one yourself? I really appreciate any feedback you may have.

Also notice, that this device is useable for small (terrarium) to large (greenhouse) grow operations. Also, this device can easily be expanded (one more sensor plus two more AC controll blocks per chamber) to control more than one chamber independently.

All this said, please look at the picture / writeup here:
http://www.rettc.com/projects.php

And please tell me what you think!

Thanks,
Alex Martin
Is this a good idea?
You may choose only one
Yeah, cool, keep working on this!
No. This sucks. Bad idea.
Would you want to buy one?
You may choose only one
Yes! Whatever the cost.
Yes, but less than 180$
Yes, but less than 130$
Yes, but less than 80$
No, it seems too expensive given the parts cost.
Would you like to see instructions on how to build your own?
You may choose only one
Yes, that would be cool
No, don't waste your time, I like to hope my perlite does the trick.


Votes accepted from (02/28/05 12:17 AM) to (No end specified)
View the results of this poll | Filter by response



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OfflineVALIS
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Re: is there interest in a temperature / humidity controller? [Re: mrlucretius]
    #3844441 - 02/28/05 12:28 AM (11 years, 9 months ago)

MS-2 Independant Temperature/Humidity Controller .... $145

I think it's super cool that you're making one of these from scratch.

But the one above seems to be in the price-range that you've estimated.


--------------------
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Offlinemrlucretius
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Re: is there interest in a temperature / humidity controller? [Re: VALIS]
    #3844513 - 02/28/05 12:39 AM (11 years, 9 months ago)

Darn.

I thought I looked far and wide for a device like this. Well, to match this device, that means I would use no lcd. That means that my cost to build one would be about 80$, is this still something that interests anyone? I guess it would be a ripoff of the device you pointed me too above, except it would cost more like 100$ retail.

Thanks,
Alex


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OfflineVALIS
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Re: is there interest in a temperature / humidity controller? [Re: mrlucretius]
    #3844862 - 02/28/05 01:29 AM (11 years, 9 months ago)

$100 would definitely be alot more affordable... but I would imagine that the sorts of people who would be interested in using one of those, aren't going to be too bothered w/ a "mere" $40-50 price difference on something they felt was going to be a robust, and reliable, professional grade piece of equipment from a well established vendor. Just a guess though.

If you could somehow get the retail price down to $60-80, even if it meant a lower-quality/less-accurate device, it may possibly attract people who are a little more casual about their cultivations, but who would still love to have a more automated setup.

I dug the lcd though, I thought that was a pretty cool addition. (c8=


Beers!


--------------------
Nature is the Technology of the Divine.


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OfflineIGnosticAbhorI
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Re: is there interest in a temperature / humidity controller? [Re: VALIS]
    #3844893 - 02/28/05 01:35 AM (11 years, 9 months ago)

I Agree 100% with VALIS, price is the main reason for my manuel labor...If my funds weren't so short, I'd be totally automated, It's kool that you built your own, props to you :thumbup:

Good luck on building something Cheap and affectice, I'll def. hope that you achieve your goal, it'd be nice to have an automated system :wink:

-Gnostic


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Re: is there interest in a temperature / humidity controller? [Re: mrlucretius]
    #3844911 - 02/28/05 01:39 AM (11 years, 9 months ago)

I think thats very nice! I would most definitely like a schematic or write up of how to build this. Personaly, I think the sensors need to be as accurate as possible. And keep the LCD screen.


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OfflineDem_Bones
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Re: is there interest in a temperature / humidity controller? [Re: MrMaddHatter]
    #3845064 - 02/28/05 02:21 AM (11 years, 9 months ago)

just because their is one on the market already does not mean you should not go for it, i look far and wide i could not find any thing ether,so the m2 deal is not that easy to find, i made a post on this in the advanced forum justa few days ago here is what think you should do. build a box that you mount to the out side of a working full size stand up freezer or refrigerator and set it up so you plug the heat-lamp or heater , humidifier , and freezer in to it and set the temp you want like say 75? if its hotter in the room than than that it kicks on the cooler if its cooler and turns on the heater, i have not seen any humastats that work past 98% humidly no you may want to add a timer for the humidifier hell add two or 3 timers the other two could be used for lights and air exchanges, this is a great idea i had the same one if you put this out there and made a switch on the humidity part to add or remove that way it could be plugged in to a dehumidifier too that way this same product could be sold to people growing plants


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OfflineDem_Bones
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Re: is there interest in a temperature / humidity controller? [Re: Dem_Bones]
    #3845098 - 02/28/05 02:36 AM (11 years, 9 months ago)

man i just have to say i would buy one, the people playing with cake and tuperware may not but when thay move up the the nest step that will growing trays in a stand up freezer works great i wired my up by hand but ther are alot of people out there that cant or dont want too what is the rs-232 port on the bottom for does it conect to the computer to program a basic stamp ? or some remote control ? i have these deals at my shop that you put on both both ends of a serial rs232 conetion and it lets you extend the cable to like 20 feet thay are used to for cell towers, big genarator or any big equtment that may need to call home if its broken or need service that hook a exturnal modem to them


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Re: is there interest in a temperature / humidity controller? [Re: mrlucretius]
    #3845119 - 02/28/05 02:47 AM (11 years, 9 months ago)

GREENAIR
Very high quality, but a bit spendy if you are on a budget.

There certainly is a market, if one could get the price of multifunction controller into the fairly inexpensive range.

Bud growers would also jump on them.


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InvisibleMrMaddHatter
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Re: is there interest in a temperature / humidity controller? [Re: agar]
    #3845140 - 02/28/05 02:59 AM (11 years, 9 months ago)

A friend of mine has one of those greenair THC-1 and it didn't work very well for keeping the rh at 80-85%. When set at 80 the thing just kept running, over-saturating everything. Could be he had it setup wrong. Sometimes he's real high on weed :stoned: :grin:

Seems like it was built for plants mainly.


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Offlinedjcube
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Re: is there interest in a temperature / humidity controller? [Re: MrMaddHatter]
    #3845479 - 02/28/05 06:08 AM (11 years, 9 months ago)

Im very interested. FYI, American Science and Surplus are currently offering assorted LCD displays at five for $5.00.


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Offlineonetime
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Re: is there interest in a temperature / humidity controller? [Re: djcube]
    #3845740 - 02/28/05 10:17 AM (11 years, 9 months ago)

http://www.control3.com/4190p.htm



this is the one i got there are better ones that have temp too but i didnt have the money at the time i figure since mush fruits at my room temp 70-75F that i didnt need one


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Offlineonetime
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Re: is there interest in a temperature / humidity controller? [Re: onetime]
    #3845746 - 02/28/05 10:19 AM (11 years, 9 months ago)

oh and one thing i dont like about mine is that i have to keep it in the rh tent i would like one that i could use that just had a sensor that went in to the rh tent and not the whole unit i picked mine up for like 80$


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Re: is there interest in a temperature / humidity controller? [Re: mrlucretius]
    #3845797 - 02/28/05 10:39 AM (11 years, 9 months ago)

An analog hygrometer can be gotten wholesale for <$2. They have a little hand like a clock that goes around and back according to the humidity.


If one of those were designed to be particularly accurate in the 90%-100% range, and you attatched it to a circuit that would switch on and off according to the position of the hand, I would think you could build a 110v switch for under $20 that way.

The user would need to be able to take the dial out and calibrate it using the standard technique (metallic salt calibration, table salt = 75%)


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OfflineTantalus
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Re: is there interest in a temperature / humidity controller? [Re: mrlucretius]
    #3845949 - 02/28/05 11:33 AM (11 years, 9 months ago)

If it comes down to you not being able to profit/not worth your time and writing up the plans for everyone, you could always charge a few bucks for plans if they're good enough and replicable enough.  Emphasis on good enough.  People would have to be honest and not spam your plan, but priced at a few $'s most people would be honest if it was worth it.  You could even give it away & make it open to donation... some charities purposly have no 'suggested donation' so that some people give more.

Doesn't sound like much, but you wouldn't have to make the things and if you could get even a few dozen people to paypal a few bucks...

But if you did want to make them, you may be able to get bulk parts cheaper.  But then you'll have people complaining about them breaking, assembly time, ect...

Another thought, if these do all you say they do to an exact degree, most people that would need one would have the money.  :smile:  Most items like this are geared towards bud, so inefficient or imprecise for shrooms.  (That's probably why you didn't find them, the only uses I can think of off the top of my head are shrooms and bud.)

Oh, I just noticed your post count and reg date.  If you're going to take any kind of payment, even if they have a 'safe' address, you'd have to find a way to make it anon.  (I can't remember what paypal's rules for that are.)

If you just wanted good karma, you could post free plans, but I'm not sure that would even be best.  If you were going to make $ off this (unit or plans), you'd probably be willing to put more work into it & do a better job.  That's the way most people work anyway. :rasta:

Sorry for all this rambling, I hope it helped spur some thoughts.  :cool: :mushroom2:


--------------------
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Every gun that is made, every warship launched, every rocket fired signifies, in the final sense, a theft from those who hunger and are not fed, those who are cold and are not clothed... The cost of one modern heavy bomber is this: a modern brick school in more than 30 cities. We pay for a single fighter with a half million bushels of wheat. We pay for a single destroyer with new homes that could have housed more than 8,000 people..."

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Offlinemrlucretius
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Re: is there interest in a temperature / humidity controller? [Re: Tantalus]
    #3852334 - 03/01/05 03:51 PM (11 years, 9 months ago)

Here is the spec for the sensor:

http://www.parallax.com/dl/docs/prod/datast/shtx.pdf

It is acccurate enough in the 80-100% range, look at the specs.

More later...


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Re: is there interest in a temperature / humidity controller? [Re: mrlucretius]
    #3852458 - 03/01/05 04:20 PM (11 years, 9 months ago)

Quote:

mrlucretius said:
Here is the spec for the sensor:

http://www.parallax.com/dl/docs/prod/datast/shtx.pdf

It is acccurate enough in the 80-100% range, look at the specs.

More later...




Here's a moneymaker for ya, if you can work it out... That sensor seems to be very accurate as well as have a wide temp range (-40 - 254.9 F)...  If you could make it submersible, you could wire your box to a hotplate as well and create automated pateurization....  Bulk growers would eat that shit up!!!

:bow:


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which we must fear most. And that is... the indifference of good men."
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OfflineDarkie
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Re: is there interest in a temperature / humidity controller? [Re: NeedMoreSleep]
    #3854089 - 03/01/05 09:41 PM (11 years, 9 months ago)

At the very least this final explained why those nifty thing are so damn pricy. I got all the parts to put together a recycle timer (although i have been too lazy to even look at it yet) for about $25. That would be a more viable solution for people who are only concerned about controlling one variable. You could make and sell those too.


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Offlineggent001
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Re: is there interest in a temperature / humidity controller? [Re: mrlucretius]
    #12096607 - 02/25/10 06:00 PM (6 years, 9 months ago)

I noticed one on ebay today for under 100 w a  remote sensor. An igs 030. I don't use them personally, but coul come in handy for folks less experienced.


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Re: is there interest in a temperature / humidity controller? [Re: ggent001]
    #12096675 - 02/25/10 06:09 PM (6 years, 9 months ago)

This thread is 4 years old >_<


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