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 poke smot!
floccinocci floofinator
Registered: 01/08/03
Posts: 5,248
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 Re: Terrarium control system *DELETED*  [Re: jorneyer]
#1575182 - 05/24/03 08:10 PM (20 years, 4 months ago) |
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Post deleted by poke smot!Reason for deletion: x
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 amyloid
Stranger
Registered: 03/08/03
Posts: 980
Last seen: 9 years, 8 months
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Re: Terrarium control system [Re: poke smot!]
#1575226 - 05/24/03 08:31 PM (20 years, 4 months ago) |
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im in the process of creating my own automated system, but im hooking mine up to a nice lcd, and im trying to code a menu system, to change temps, humidity, etc... well just thought you should know, your project inspired me; so please share as much as u can =)
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"A human being is part of a whole, called by us the Universe, a part limited in time and space. He experiences himself, his thoughts and feelings, as something separated from the rest--a kind of optical delusion of his consciousness. This delusion is a kind of prison for us, restricting us to our personal desires and to affection for a few persons nearest us. Our task must be to free ourselves from this prison by widening our circles of compassion to embrace all living creatures and the whole of nature in its beauty."
-Al Einstein
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zeronio
Stranger
Registered: 10/16/01
Posts: 2,349
Loc: Slovenia
Last seen: 7 years, 28 days
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Re: Terrarium control system [Re: poke smot!]
#1575798 - 05/25/03 01:52 AM (20 years, 4 months ago) |
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I have a question for your FAQ. 
I just got the necessary parts and I'm preparing to assemble it.
I have a question about wiring sensors. I got a SHS A3 humidity probe which is good for measuring high levels of humidity. It changes resistance like this: 75%<30kO, 93%<100kO & 100%>200kO
The temperature probe is KT100 ( http://www.infineon.com/cmc_upload/0/000/012/047/kt_10_.pdf ) and is declared to have 1630 O at 0C, 2000 O at 25C & 2080 at 30C.
How should I wire them to get the maximum resolution from the 8 bit A/D in the ranges needed for mushroom growing (RH 75%-100% & Temp 0C-30C)?
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poke smot!
floccinocci floofinator
Registered: 01/08/03
Posts: 5,248
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Re: Terrarium control system *DELETED* [Re: zeronio]
#1576551 - 05/25/03 03:39 PM (20 years, 4 months ago) |
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Post deleted by poke smot!Reason for deletion: x
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poke smot!
floccinocci floofinator
Registered: 01/08/03
Posts: 5,248
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Re: Terrarium control system *DELETED* [Re: poke smot!]
#1576554 - 05/25/03 03:44 PM (20 years, 4 months ago) |
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Post deleted by poke smot!Reason for deletion: x
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Rustik
Where am I?
Registered: 04/17/03
Posts: 289
Last seen: 8 years, 10 months
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Re: Terrarium control system [Re: poke smot!]
#1576732 - 05/25/03 05:53 PM (20 years, 4 months ago) |
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wow poke, you are quite the tinkerer here.
All in all, awesome setup!
So, I'm right in assuming your program also uses the input from the temp/RH gauges to turn humidifiers/heaters on and off as needed?
THAT would be the shit. 
Next you would have to add a small fan and a CO2 sensor to regulate CO2 levels. This would work so much better than trying to do it manually, and IMO you would get some badass results in a chamber run by your device.
If you are ever planning on selling any, let me know!
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The blue... the blue!!!
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40oz
Registered: 01/18/01
Posts: 30,119
Loc: Sandy Eggo. Ca.
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Re: Terrarium control system [Re: Rustik]
#1577905 - 05/26/03 07:21 AM (20 years, 4 months ago) |
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i dont know if anyone covered this (it would take me dayz to read this entire thread anda good nights sleep to try and 'think' i understand the logistics of this neat little invention  )
but as far as the software part maybe you could add selectable preset
growing parameters for different species..
for example: ([]<--brackets denote givin preset/drop menu boxes]
[what species] in which [phase](spawn run,post casing/pre-pinning, primordia formation,cropping,etc)
each phase has pre-programmed parameters...let it take it from there...
kinda like set n forget...
thats my insomniated 2 cents
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tiny_rabid_birds said:
"your avatar is dirty."
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poke smot!
floccinocci floofinator
Registered: 01/08/03
Posts: 5,248
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Re: Terrarium control system *DELETED* [Re: 40oz]
#1578136 - 05/26/03 10:49 AM (20 years, 4 months ago) |
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Post deleted by poke smot!Reason for deletion: x
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jorneyer
Stranger
Registered: 04/12/03
Posts: 12
Last seen: 20 years, 2 months
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Re: Terrarium control system [Re: poke smot!]
#1584495 - 05/28/03 10:06 AM (20 years, 4 months ago) |
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A few thoughts so far;
I do not see why you need the computer to be involved at all. It makes the project beyond the scope of most potential users. I can see why you would want to sell them software, but that is two things, not one thing. The logging is a great feature, to be sure, but I think it is unecessarily complicated. To say "Just code it yourself" is fine but I am not in tech school anymore, with all the resources that go along with that. I cannot burn a PIC for that reason.
What I see happening here is a very simple {to use} system. You plug it into the wall, and plug your humidifier and heater into it. It would be up to the user to decide how big of a heater etc to use, based on his application.
Take linear sensor voltage and run it into the A/D. May want to op-amp first, not sure. Run a reference voltage to be user-adjustable for tuning, with two sets of LED displays. When they don't match, the humid. kicks in. All parts are off-the-shelf. That way plans and lists can be made available to any shroom grower, if they want to build one.
Does anyone know a good free circuit design software we could use for collaboration? I used to use electronic workbench, or PSpice might be good too.
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shroomologist
member
Registered: 09/29/02
Posts: 161
Loc: SouthEastern US
Last seen: 18 years, 7 days
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Re: Terrarium control system [Re: jorneyer]
#1585626 - 05/28/03 04:25 PM (20 years, 4 months ago) |
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I thought this thread died.
I recently got a little gadget for home-robotics.
Its called SV203, its from Pontech
Its basically a pic, with an A/D converter, used to control servos. But its able to set pins as high or low instead of using a PWM signal. SO basically, it has 5 a/d ports, 8 servo outputs/inputs 2 unused input outputs....and its all done serially.
Right now i have a few programs for IR distance sensors/servos and a temp sensor. I have some H-bridges i'm going to be using as well for some possible Peltier cooling and heating.
I programmed it using Hotpaw basic for the palm pilot. Its standalong, and you can LOG whatever your data is, to a memory card.
SO far, i set it to read values from the IR sensors, log them to the memory card, and control a motor's speed depending on the distance (which is what you would literally do if you had a humidity or temp sensor and a heater/cooler)
Best of all, its around $60 and you can build it even cheaper. Its not hard, just takes a little coding. There is a standalone (onboard EEprom) that lets you run a program off it, and use an LCD etc, so it doesn't need to be tethered to the computer.
let me know if anyone is interested.
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shroomologist
member
Registered: 09/29/02
Posts: 161
Loc: SouthEastern US
Last seen: 18 years, 7 days
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oh, zeronio
can you link the Humidity sensor? i'm interested!
also, i found peltier modules for $5 a piece with heatsink
here's a rundown of cost that i've seen thus far for my design:
$5-$10 - pic processorwith onboard a/d
$2 - temp sensor
$10 for two - peltier module for cooling and heating
free - fan
free - old computer power supply
$20 - high power fets to regulate PWM signal to peltler junction for incremental heating and cooling, and also to the fan motor
$10 - LCD
a relay per humidifier
add another 10 or so for wire, some buttons for navigation, enclosure..etc
code is easily done, i have most of it already. It would be serial so things could be logged, or run alone via LCD and buttons.
it would most definately be under $100 including software, but also the serial interface code so you could code it as you want on any platform with a serial connection.
i also found SBC Pentium 200MHz computers for $25 if thats also an option, onboard ethernet, IDE controller, LCD controller, serial, parallel, VGA port, keyboard, mouse...think about the standalone system that you could build! *drools*
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jorneyer
Stranger
Registered: 04/12/03
Posts: 12
Last seen: 20 years, 2 months
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as far as i can tell, the best humid. sensor type would be linear. Does anybody know the part number for an A/D that will accept this input? In the 0-4v range. I am using the latest free electronic workbench software but can't find how to search for specific parts. If anybody wants to burn a PIC for me that is cool too.
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zeronio
Stranger
Registered: 10/16/01
Posts: 2,349
Loc: Slovenia
Last seen: 7 years, 28 days
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I cannot link directly to the page for my sensor. Go to www.conrad.de, enter SHS A3 in the "suche" field and press "go". After the find press "anzeigen".
It's non-linear (logaritmic) resistance sensor. It's working voltage is 0.8V. Any ideas on how to interface it?
The linearity is not a problem. If I understand it right I'll get more accurate readings in the right range (RH 75-100%). Of course I'll have to do some software signal conditioning.
Quote:
also, i found peltier modules for $5 a piece with heatsink
Wow, that's really cheap. What's their power?
If you're going to use the same element for heating and cooling it would be nice to see the circuit that does the switching! 
I got an old freezing cabinet that still works so for now I won't play with peltiers. However they would be great for smaller high-tech pods.
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poke smot!
floccinocci floofinator
Registered: 01/08/03
Posts: 5,248
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Re: Terrarium control system *DELETED* [Re: zeronio]
#1588186 - 05/29/03 07:57 AM (20 years, 4 months ago) |
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Post deleted by poke smot!Reason for deletion: x
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jorneyer
Stranger
Registered: 04/12/03
Posts: 12
Last seen: 20 years, 2 months
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Re: Terrarium control system [Re: poke smot!]
#1588268 - 05/29/03 08:57 AM (20 years, 4 months ago) |
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Would you want to have a pot on the Vref for drift adjustment? From the literature it seems that humidity sensors 'drift' after a while.
Here is another issue- when does the humidity turn off? The humiid [H] in the chamber drops, so the [H]er kicks in. With my [H]er, it puts out a real blast of fog. This boosts [H] too high, so it shuts off. I see a sort of oversaturation effect happening.
We have set a point, not a range.
Poke, yours is up and running, do you observe this effect? It is probably nothing.
I would like to see this thing workable like a heathkit... just connect the dots with a soldering iron.
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mattch1
Monseur
Registered: 05/16/03
Posts: 126
Loc: WV
Last seen: 19 years, 29 days
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Re: Terrarium control system [Re: jorneyer]
#1588885 - 05/29/03 01:29 PM (20 years, 4 months ago) |
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Ive also made a similar-automated system. I simplified mine alot by using Parallax BASIC Stamps. I can control 2 terrariums (all monitored and automated seperately) and it works perfectly. It only cost me about $100 to get all the parts and the programming was incredibly simple (for people not as versed in computers/programming). If anyone is looking in to making one of these, I would suggest using the BASIC stamps, they simplify the process greatly, with minimal cost.
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Everything I ask is for informational purposes only. There is no truth to what i say. I am lying.
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Anno
Experimenter
Registered: 06/17/99
Posts: 24,162
Loc: my room
Last seen: 1 day, 22 hours
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Re: Terrarium control system [Re: mattch1]
#1589072 - 05/29/03 02:20 PM (20 years, 4 months ago) |
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any links?
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shroomologist
member
Registered: 09/29/02
Posts: 161
Loc: SouthEastern US
Last seen: 18 years, 7 days
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Re: Terrarium control system [Re: Anno]
#1589977 - 05/29/03 05:37 PM (20 years, 4 months ago) |
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poke smot!
floccinocci floofinator
Registered: 01/08/03
Posts: 5,248
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Re: Terrarium control system *DELETED* [Re: shroomologist]
#1591382 - 05/29/03 09:57 PM (20 years, 4 months ago) |
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Post deleted by poke smot!Reason for deletion: x
Edited by poke smot! (05/29/03 09:57 PM)
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shroomologist
member
Registered: 09/29/02
Posts: 161
Loc: SouthEastern US
Last seen: 18 years, 7 days
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Re: Terrarium control system [Re: poke smot!]
#1592318 - 05/30/03 06:58 AM (20 years, 4 months ago) |
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I think i'm going to mess around with the pic tonight and try some code.
basically: (AD1 is pot setpoint, and AD2 is sensor)
start
setpt = AD1
If AD2 less than setpt,
turn on
else,
turn off
goto start
similar for humidifier
LCD subroutines are everywhere, serial subroutines are everywhere
so i could have a standalone unit, or a tethered unit easily
I scored some Graphic LCD's from work
*yoink*
and some character (2*16) LCDs too!
I even *yoinked* an SBC to play with, not sure if it works tho.
what RH sensor works best for high humidity without saturating/failing in 100% RH?
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