My compliments to you for choosing a relevant area for research. Automated greenhouse (plant growth chamber) which require controlled temperature and humidity for optimal plant growth and therefore to measure these parameters and control them there is need of standard greenhouse machinery. I am providing you a link for your study.

https://www.pc-control.co.uk/greenhouse.htm

My compliments to you for choosing a relevant area for research. Automated greenhouse (plant growth chamber) which require controlled temperature and humidity for optimal plant growth and therefore to measure these parameters and control them there is need of standard greenhouse machinery. I am providing you a link for your study.

https://www.pc-control.co.uk/greenhouse.htm

Dear Malhotra sir , I thank you for your link

and I am still trying to define my boundaries in research , and I will highly appreciate for valid approach guidance

I've never gone into electronic complex systems but I have used simple, cheap tools like paraffin wax filled, vent openers for temperature, and simple home made wetleaf for humidity. Let me know if you want more info on these.(don't come here often anymore, every few weeks)

There are now so many ways to build your own, using single board computers costing as little as $5. Look at arduinos, raspberry pi, and the like along with addon boards like this https://www.96boards.org/product/linkspritesensorkit/

Thanks Jacob Simons, can you please share the sensor modeling which you mad on your own like temperature and humidity factor .

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We're doing a fully automated aeroponic grow system using computer controlled sensors and actuators. Here is a link in case it interest you: http://nextfood.co.

Dear Mr. Rasmus, it really interesting to see your work.

i am interested to know more technical details , can you please share the technical studf going in your organization.

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The design is open source. We are a bit short on time in regards to documenting things but there is an explainer video in the works. Please feel free to follow us on our facebook page that will be updated when it is released: http://facebook.com/nextfood.co.

The wetleaf is really basic.

Things you need:

1250mm x 6mm galvanised rod

210mm x 160mm shadecloth

350mm x 40mm plastic pipe for pivot upright

Plastic base for pivot

Mercury switch (Encapsulated in glass)

Adjustable weight

10 metres light twinflex (needs to be able to handle 24v)

24v watering solenoid

24v irrigation plug pack (for whatever your local voltage is)

Piping and fittings

Misters or foggers (for whatever your pressure is)

Start with the length of rod, bend a circle or a rectangle. Weld where it joins. (One in photo is about 200mm x 150mm) Cut a 50mm piece. Weld the 500mm piece to the centre of one of the 150mm ends so the whole thing is flat. Weld the 50mm piece at a right angle about 150mm from the rectangle to the main arm. Make a pivot point. Mine is vertical plastic pipe attached to a round disk with 2 deep notches (for the main arm to move freely) and two shallow notches (for the right angled 50mm piece to sit in). Stitch shadecloth to rectangle using fishing nylon. Solder 2 to 4 metres of twinflex to mercury switch. Encapsulate soldered joins with silicone mastic. Attach mercury switch to main arm with cable ties so that when shadecloth end tilts down, mercury is NOT on the contacts. Attach the weight so the dry shadecloth end tilts on an upward angle.

Connect the solenoid to the water supply. Attach pipe to outlet of solenoid and fit misting or fogging over the bench where you need it. Place wetleaf in the middle of your bench.

Connect one wire to one of the solenoid wires, connect the other wire to the plug pack, connect the remaining wire from the solenoid to the plug pack. Turn on water supply, switch power on, adjust weight on arm to have wetleaf cycling for the right moisture. On a hot sunny day it might come on every 20mins and on a cold overcast day every 3hrs.

I have used basic homemade tools like this for my cuttings in my tunnels, for many years. I find the mercury switches need replacing about every 2 years as the terminals inside corrode from arcing. The shadecloth needs cleaning with bleach if algae builds up.

For the automatic openers have a look here http://www.window-openers.com/greenhouse-auto-openers/

Usually $50 to $70 AUD, no wiring involved. The device is completely self sufficient. Adjust a knob on the end of the ram to get the desired opening temperature. One comment though. Make sure you attach a chain to the window and the frame, to prevent the window from flying up too far and ripping the device apart. I learned the hard way :-(

I have also used one of these to open a centre pivot vertical window as well.