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16  Using Arduino / Displays / Re: helper program for designing graphical interface on: August 30, 2013, 01:09:26 am
Thanks Billroy,

That was exactly what I need(ed). Sorry for the late reply, but since I've ordered another 3.2" TFT for a new project I was again in need for this application and saw your reply. I'm using the wonderful 'UTFT_Buttons' library Henning Karlsen wrote and this will fit the bill! smiley-grin

With kind regards,

17  Community / Exhibition / Gallery / Re: Billie's Hydroponic Controller on: August 11, 2013, 02:24:40 pm
Its pretty awesome!
And the PH reader is really accessible, I had trouble finding one when I was doing something similar.

Great work!
Thanks! smiley

Any chance we could get the code on github or such?
It already is on github --> link smiley-wink
18  Using Arduino / General Electronics / Re: Arduino + 5V DC relay + 6V DC pump on: August 06, 2013, 12:25:16 am
A sort of lubricant for silicone would do the trick. Used the peristaltic pumps in my setup and had the same sort of problem. First disassembled the pump head and the tubing was jammed in between the rollers... When I fixed that the pump started to turn, but very slowly. Though the motor runs very fast when removed from the pump head... After injecting the pump head with a lubricant the motor ran at a nice speed smiley-wink
See if that works...
19  Community / Exhibition / Gallery / Re: Billie's Hydroponic Controller on: July 29, 2013, 01:30:13 pm
Thanks! smiley-grin
I agree! I've also seen some great projects out there which deserve a thumbs up smiley-wink
Edit: Just found out that there's a system like that on this forum. There's a button/link beneath your avatar that called Karma... Press on it and it's like a 'thumbs up' smiley-wink
20  Community / Exhibition / Gallery / Re: Billie's Hydroponic Controller on: July 29, 2013, 01:13:56 am
Thank you for the interesting input smiley
The temp/humidity sensor is mounted on the side of the controller, which isn't the best solution...But this is a prototype so I knew there would be problems I would run in to...

Yesterday I made a new movie inside the greenhouse. The plants are growing wild at the moment... Harvested about two kilo's of Jalapeno's and there are more to follow smiley-wink

With kind regards,

21  Community / Exhibition / Gallery / Re: Billie's Hydroponic Controller on: July 23, 2013, 04:16:45 am
Oh I see...Here's a new link smiley-wink

With kind regards,

22  Community / Exhibition / Gallery / Re: Billie's Hydroponic Controller on: July 22, 2013, 04:13:11 am
Thx! smiley
The latest one that's workable is already on-line smiley-wink
Since the controller is doing it's job in the greenhouse I haven't updated it to check if the code is working properly...
23  Community / Exhibition / Gallery / Re: Billie's Hydroponic Controller on: July 20, 2013, 06:20:55 pm
Hey DX,

Thanks for your kind reply!! The purpose of this project was to create a low budget, open-source controller which could be used all over the world so people could improve their crop yield and have more money to spend on other things other then food...
Though this project is still in it's infancy I hope one day it will be used by many people.
And off course I'm interested to see your code so you'll soon get a pm from me smiley-grin
The screen shots from your web interface look very promising, though implementing CO2 wasn't initially in my plan. I looked it up for some idea's about it and one could build a CO2 generator for a very low budget...So thanks for pointing this out to me smiley-wink
Will be looking out for some cheap CO2 sensors out there...

With kind regards,

24  Community / Exhibition / Gallery / Re: Billie's Hydroponic Controller on: July 17, 2013, 05:21:27 am
Hey everybody,

It's been a while since my last update.
I was currently busy developing a shield for my controller. Since Eagly CAD doesn't agree with me it's taking quite some time...
In the meantime I found a cool website with lot's of information about the subject. He (Andrew) calls this the 'Arduarium Controller', but since this shield has everything my controller needs I'm trying to build it myself. You can buy the shield ready made, the bear PCB and Andrew even put the Eagle files on Github for people to use. The Eagle files are licensed under the TAPR Open Hardware License.

Meanwhile I have another short movie ready for you guys and gals to see the results from my controller. I foresee that the plants will reach the sealing within a month or so...

25  Community / Exhibition / Gallery / Re: Billie's Hydroponic Controller on: June 24, 2013, 01:04:09 pm
It's actually a 5V adapter for the relay module. I made a mistake before smiley-wink
You connect the VCC and GND from the relay to the + and - of the 5V adapter and the inputpin and GND from the relay to the Arduino GND and outputpin. That way your ground (GND) becomes what's called 'common'...
The output from the relay are 3 connectors per channel (NC and  NO) and are isolated from the input circuit. So you can even switch 120/230V AC if you like (But be careful if you do. Electricity is dangerous smiley-wink )
You connect the peristaltic pumps to each channel per pump on the NO (normally open) connections together with the adapter in series... When you put your Arduino outputpin high the relay switches and current will flow making the pump turn...
26  Community / Exhibition / Gallery / Re: Billie's Hydroponic Controller on: June 23, 2013, 09:01:31 am
My pumps where 12V, so that's why i needed a 12V power supply.
The relay and Arduino need two separate power supplies because when the relay switches on/off then a tiny current goes back to the Arduino and disrupts the pH reading the Phidgets 1130 makes...You'll see smiley-wink
27  Community / Exhibition / Gallery / Re: Billie's Hydroponic Controller on: June 23, 2013, 04:08:04 am
The relay should have it's own power supply. Both grounds from the Arduino and the power supply from the relay should be connected. You can run the relay with the power from the Arduino, but the pH shield is so sensitive that the on/off action from the relay messes the measurements from the pH shield. Also the peristaltic pumps need their own power supply because they need more current then the Arduino can deliver...
So in total you would need three power supplies -->1x 5V (relay); 1x 9V (Arduino); 1x 12V (Peristaltic pumps)
I bought my Phidgets 1130 in Germany last year. Because of the soccer world cup (or something) the owner of the shop would send it free of charge smiley-grin
28  Community / Exhibition / Gallery / Re: Billie's Hydroponic Controller on: June 22, 2013, 03:01:25 pm
Hi Billie,

Thanks for the quick reply :-)

Is the pH Meter all the time into the water to measure the pH?

I had some information which sad that letting the ph probe all the time in the liquid will cause damage?

Perhaps this is wrong I only want to confirm it.
The pH probe is constantly in the nutrient tank. I haven't seen no degradation on the probe...

And second question : basically I only need one ph Probe and two peristaltic Pumps to setup a pH measure and adjustment station?
I have a Arduino UNO Board with max. 5V on the Digital Output with max. 30mA
I think you will be able to get that on the Uno. I don't have one, but since you are not using the TFT display and touch I think it will work...

Those look ok to me. Another tip: When using silicone tubing (as in your pump) you have to use nitric acid instead of sulfuric acid. Because the latter will corrode the silicone tubing smiley-wink

Do I can connect them directly to the board or do I need a extra power supply ?
No don't connect the pumps directly to the Arduino. You'll need a relay for that...Something like this one -->

And as I have rad you divided the code so I can just take the part that fits?
Yes, it is modular, but you still need to think and debug for yourself smiley-wink

And last but not least  smiley-mr-green : Why do you use a DC 9V plug for your arduino ? I thought 5V is max

The Arduino needs a power supply with a minimum of 6V and a maximum of 12V. So 9V is just in between smiley-wink
29  Community / Exhibition / Gallery / Re: Billie's Hydroponic Controller on: June 22, 2013, 04:48:17 am
Hello aarondc,

Thanks for the nice comment smiley-wink
To answer your first question...I make my own nutrient mix with the help of HydroBuddy. This program makes all sort of calculations and returns me a list of Macro and Micro nutrients and their weight in grams needed to make a predefined amount of nutrient mix...
If you understand Dutch, I've made a basic usage tutorial here
I have all sorts of recipes in HydroBuddie's database. So I can make a nutrient mix for almost every crop you can imagine...

You probably have some experience with hydroponics...Because of your second question smiley-wink
Yes, singular nutrients (macro or micro) can get depleted. To measure one single substance one would need fairly expensive probes and that's beyond my hobby budget smiley-wink
You could measure the EC value of a mix, but that still wouldn't tell you which substance is getting low. I do measure the EC value (with a pen for the moment, but I'm working on a improved version of my controller), but this is to know how much concentration of nutrients are in my 200L tank...
To make sure I always have the right amount of singular nutrients in my tank (read: the recipe is still as it should be...) I do a nutrient change every 14 to 30 days. The waste goes to my conifers and grapevines...They also like the readily available nutrients smiley-wink
30  Community / Exhibition / Gallery / Re: Billie's Hydroponic Controller on: June 22, 2013, 04:14:58 am
Hello Tonno,

Reading the pH is fairly simple as the Phidgets 1130 outputs an analog signal which can be converted to a pH. You just do an anologRead on the pin which connects to the Phidgets and run this calculation --> 0.0178 * sensorValue - 1.889
What outputs is the current pH value at a constant temperature of 25°C...

Dosing is not that easy. I work with a Setpoint and a Hysteris. The setpoint is the pH I would like to have and the hysteris is the amount the pH can deviate from this point.
Explaining how the code works is not that simple, but here goes...
I first check if the pH is above or below the setpoint. Then change a variable according to that so the program knows if it's a base or acid that needs to be added. Note: If your plants are healthy and absorbing nutrients the pH can only go up. That's because plants use the negative ions for nutrient absorption...
Let's assume the pH is above the setpoint. The program now checks if the pH is above the hysteris. If so, dosing will start (which is a small peristaltic pump) until the pH reaches the setpoint. If the setpoint is reached then dosing will stop and the variable is set to 0 again.
This repeats constantly...

I hope this helps smiley-wink
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