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Yeah why not? Open source needs funding too. You think Linux was all built for free? Concept of open source is that the design is free to copy as long as credit is where credit due. It can be sold but you pay for the work not the idea. Example: I build a team and get grow light 1.4 ready and we...

puppy linux on live booting microSD/reader stick/combined wifi dongle. you can install all the usual tor and stuff. even better it can totally encrypt your drive, or not write anything to disc at all as it can run in RAM and when you switch off its cleared. never use the built in network...

cambrian genomics will do it for you for $1000 but you need to modify the source code yourself. theres lots of open source free software to do that in linux. you need to download the dna of the plants you want to fk with and identify the genes that do your bidding (luckily teams of biologists...

I have been working on a modern cheap efficient growlight system that anyone can build or hack. Please if anyone can add to this get in contact. I have a good base design but need some help with PIC microcontroller that will run the PWM to the power supply, temperature control, timers, colour...

heres a few of the lights that i built. prototypes at the moment but getting better each time. the cooling system on the long bars is rather complex and involves a fair bit of fiddly metalwork as the heatsinking is all done inside then ducted to the driver module. all the units are running at...

here are my new ones for grow period. consisting of 2 100w white cobs, 1 100w red phosphor, 1 100w blue 450nm, a 660nm 10x10w bar, and a blue 435nm 10x10w bar. all the led cobs were cheap as chips (pun) except the 660nm reds which were premium stuff. now thats a real full spectrum! no gaps and...

http://spectralworkbench.org gives you all the info needed to make an accurate spectrometer from black paper or plastic and an old cd/dvd disc. comes with all software, calibration by cfl mercury bands. seriously takes less than an hour and no money as the device can tape to the camera on your...

<iframe width='500px' height='200px' border='0' src='http://spectralworkbench.org/sets/embed/2111'></iframe> i hope this works, should show swims ladies sunbed

Interesting. I have just kicked the last conventional light out and now just running led.made a spectrometer today so I will be able to check later. Would be great if a few more people here went on spectral workshop and posted results. The device costs nothing to build. Really interested to see...

does anyone know deeply about the chlorophyll action and if the sugars produced etc all mix up in the plant? what i am getting at is how would a plant react if half were lit in the spectrums for chlorophyll a and the other half in b. or max out the top canopy with reds and under/side light the...

ok SWIM is fully into flower with nice scrog colas starting to form. currently in 90cm tent with 250w cfl 90(?)w ufo and diy leds: 100w true 660nm 100w true 625-635nm and pink led tape sidelighting @40w . now he has a big bag of led chips of all sorts and can throw oodles more power in. how much...

apologies if i am cheeky by posting in advanced. i am about to start autos for the first time and i had a thought that i would like some pro opinions on: as autos dont give decent time to recover from topping and training, and considering the way scrog works, i thought about a possibility to...

Thanks for setting me straight on that. I thought for a moment I had struck a cheap way out. Have you found any 'industrial dry mix' nutes that are suitable? Something I can get a sack of...hopefully in UK or Europe.

Thanks for the heads up. So it could be used with some additives to make a good brew? Phosphorus and magnesium I think they sell bulk as well. No to water here but fair soft Cornish tap water. If I were to start experimenting should I always stick to ec 2.0 for flood n drain or is that...

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If anyone is wondering why I had remote its to kill all the noisy stuff if there was an unexpected guest. I also have now started modding them to work in reverse and avoid this happening again: plug in remote control sockets are all generic. 4 Chan's and 4 buttons on remote. To mod for DEFAULT...

Yesterday there was a malfunction on the pump. In fact a small power outage had allowed the remote control to drop back to an off position at 1900 stopping the timer. Just discovered this at 1000. Capillary root mat died. Bone dry and brown. Plants still ok and happy with h enough moisture from...

Just came across this stuff. Professional quality and cheap buying bulk direct. Anyone tried it or can compare to overpriced dope nutes?

Its actually ok with cfl. I would think a his would make a death ray in this.

Just made a great cfl shade! Here's how. Get a cooking oil drum from the local takeaway. 20 litre metal one. Cut lengthways with grinder leaving fill hole central to one half. Punch 2 holes for hanger. Place bulb ( I'm using 125w cfl) inside with base poking out fill hole. Screw lampholder on...