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  1. M

    Arduino experiments - Datalogger for the grow room

    Great stuff! you just opened pandora's box for me. The tube with the ceramic tip is filled with water completely, even submerging the sensor? which would mean you sealed the housing between the sensor and the electronics? Does the water in the tube go above the actual soil line? I've never...
  2. M

    your avatar cracks me up, thanks fer the laugh dude.

    your avatar cracks me up, thanks fer the laugh dude.
    • mduke
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  3. M

    what would be the cost for something like this using active cooling? maybe passive cooling, but...

    what would be the cost for something like this using active cooling? maybe passive cooling, but cost and weight matter to me as I'd be building 4-6 LED fixtures did I actually make sense with all the that? Happy New Year Supra!
    • mduke
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  4. M

    I also would like to add some red spectrum to adjust the blended spectrum of the COB and red LED...

    I also would like to add some red spectrum to adjust the blended spectrum of the COB and red LED to 3500k without hopefully hurting efficiency more than a point or two. IDK, i think 660nm is the way to go. Could you tell me which 660nm(?)LEDs to use , and how many, driven at whatever current...
    • mduke
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  5. M

    First, I would like to design a light to cover a 4ft x4ft area, with at least 18 par/w per sq ft...

    First, I would like to design a light to cover a 4ft x4ft area, with at least 18 par/w per sq ft and with between 750-850 PPFD over the entire canopy. I would like to use 4000k 70CRi CXB 3590 DB bin, 36v at 1050 ma for 66.3% efficiency with KB reflectors (LEDIL mimics). What is the optimal...
    • mduke
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  6. M

    I was referring to the 36v. 4000k 70 CRi @ 66.3% sounds real nice. I've been lurking on the...

    I was referring to the 36v. 4000k 70 CRi @ 66.3% sounds real nice. I've been lurking on the led forum some time now and Im thinking of trying a build, been getting into arduinos and so this could all jive really well. A few questions about some light specs for ya.
    • mduke
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  7. M

    Hi Supra, I saw you mentioned needing the SPD of the 4000k CXB3590, and i believe that cutter...

    Hi Supra, I saw you mentioned needing the SPD of the 4000k CXB3590, and i believe that cutter does indeed have the info posted at this link: http://www.cutter.com.au/proddetail.php?prod=cut2811 And one question, what is the par/w or efficiency difference between a 4000k and 3500k CXB 3590 (both...
    • mduke
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