Micro CXB3070 build - Arduino controlled - HELP NEEDED!!

hey guys! yet another dutch guy who wants to do something with LED

Because i`m new to LED, and also have an 600w HID setup allready i first like to try a micro setup, just to see if i like it better than HID. To be honest after the first LED-panels and grow logs i`d never thought that LED would make a difference in growing cannabis until a mate pointed me out to you guys. After reading some hours here, i think i`m convinced that it works.

after two nights staring at the ceiling it`s time to share my thoughts with you and hopefully get some help/answers.

so i started with a list:
* Has to be micro setup - size still to determine
* Has to yield 30-50grams
* Has to be stealth

i still have a hard time figuring everything out, especially with the calculations for heatsinks and ppdf so i surfed trough some grow logs and came up with the following.

the CXB3070 BB

LED supply 40W 40V 1050mA CC Dimming Driver

COB LED HolderAssy 28MM X 28MM RECT 700

Arctic Cooling Alpine 11 PLUS or Arctic Cooling Alpine M1-Passive 45w





The CXB3070 BB does it fit running on the chosen driver??

should run on 36w which should give me a yield of 30g + ??

and will it fitt on the 45w passive heatsink??


If i got this right so far, than i still like to know a few things. As i've seen in some logs with cxb3070 cobs that the most of you prefer 1 cob per sq feet (30,48cm x 30,48cm) so i thought to build a cabinet with inner size of

35cm x 35cm x ??? 70cm ???

from projects i did before with cfl i know i can fit a plant with pot and scrog and lamp within 70cm height but is it also possible with led!?

Can anyone tell me how much distance to the canopy is needed when running a cob at 36w?


would be really cool to get some answers!! i`m getting really exited about this and can`t wait to start building!! I`m also playing around with arduino, and like to implent this to the project. Controlling the fans rpm, monitor/log temp and humidity, light control dimming and timing.


so i still got some things to figure out... mayby a lot.. not sure anymore ghehehe but hopefully with some help and pointers i hope to start soon. And ofcourse share the build en grow with you guys!


weeew thats more text than i thought it would be sorry my english isn`t always that good, but i hope it`s somewhat understandable.

Greetings the Dutch Man

It will all work.
Those MX passive coolers are not very good at all. They barely fit a 3070 too. Spend for a better sink.

I would look into mounting the heatsink on top/outside the box with a hole cut to let light in. You could seal it with heat resistant silicone. Will help give you max vertical space to work with, and keep heat out of your box.

In a box that size, mounting it any where is fine, 6" or even less is fine for bare cobs. Mounting to the ceiling is perfect too. Your box will keep all the light hitting your plants.

You might consider samsung hard strips for a micro grow -- there's several nextlight mini grows in the works here (neither complete yet) -- that light utilizes the same LEDs. You can get 33W strips @ 135lm/w for $11. You could run at half power and should get 160-170 lm/w based on the specsheet. See this thread for more info and links if interested:

http://rollitup.org/t/samsung-hard-strips.908616/
http://rollitup.org/t/nextlight-mini-150w-grow.904028/

The title suggests you plan to use an Arduino for dimming this driver. But the driver is 0-9.3v dimming circuit So you will have to build a circuit to up Ardiunos 5v pwm signal to 10v. I don't know how electronics savy you are, but you are going to need a 12v supply, an op amp or NPN transistor and some other components to get the arduino dimming to work.
Stardustsailor details the components HERE.

I would just get a meanwell LDD1000HW and run the whole thing off 36v DC power supply. same price, comparable driver efficiency, and will PWM dim at 5v.

Greengenes707, caretak3r, thanks for the reply!

Growmau5 i`m not super into electronics but some basics i understand. Correct me if i`m wrong but if i take a look at the spec sheet of the driver they talk about dimming function by resistor 0 - 91K Ohm. So i just thought about the dimming function as follow

to take those resistor values as in the picture 23K , 45K, 68K, 91K, en let the arduino decide which one to use if let say the temp get to high. Probably this way of doing this is kind of strange??

was my first thought anyway. i`ll take a look at what you told.

greetings

thedutchman said:

Greengenes707, caretak3r, thanks for the reply!

Growmau5 i`m not super into electronics but some basics i understand. Correct me if i`m wrong but if i take a look at the spec sheet of the driver they talk about dimming function by resistor 0 - 91K Ohm. So i just thought about the dimming function as followView attachment 3684983

to take those resistor values as in the picture 23K , 45K, 68K, 91K, en let the arduino decide which one to use if let say the temp get to high. Probably this way of doing this is kind of strange??

was my first thought anyway. i`ll take a look at what you told.

greetings

Click to expand...

that is a completely acceptable way of doing it using 4 or more analog pins on the Arduino. but that is a $40 driver that really isn't suited to what you want to do and its 88.5% efficient man, I don't mean to be blunt or rude, but its just a terrible choice here.

Grab a 36v DC power supply that you can mount remote, where ever you want. 3 options are:
MW PWM-40-36 ($28 ) 90% eff (typ)
MW CEN-60-30 ($36) 90% eff (typ) 60w capable allows you to expand later with monos, far red, reds, whatever just add another $6 mw LDD driver.
MW HEP-100-36 ($78 ) 93% eff (typ) most efficient, most expensive option, but allows for expansion up to 100w. might be larger than you want.?

Use a Meanwell LDD bucking driver LDD1000HW (97% eff) has wires already attached and ready to go. $6 from anywhere

with this kind of setup, you can scrap the resistors and breadboarding. The ldds are controllable down to 0% (off) with the 5v pwm signal from the arduino.
-with 2 arduino temperature probes you can have built in safety to dim the leds based off of heatsink or cabinet temps.
-a simple sketch allows you the ability to dynamically dim the leds 1% at a time as the temp increases.
-these options give you the same, or slightly better driver efficiency, ability to expand, is slightly cheaper, and allows for more seamless arduino integration, and better control.
winwinwinwin..

cheers.

Growmau5 thanks again!

first time i see this configuration, but it makes all sense. The MW CEN-60-30 driver i like, just what you said it`s cool to have to possibility to expand later on.


it sounds like your already working with arduino. I`m still a newby with the arduino but got the most things i want running. lcd, temp&humidity, sd logging, rtc, gsm, it`s just that pwm makes my head hurt i was trying to pwm a pc fan, the specs tell me that i needed 24khz but couldn't find a way to get the arduino produce 24khz its now on 31khz and that works fine for this fan. So i`m not so sure how to pwm-control the driver correctly. Any place you can point me to?

if i can figure the pwm part out, than i definitely take this tour!

greetings!

thedutchman said:

Growmau5 thanks again!

first time i see this configuration, but it makes all sense. The MW CEN-60-30 driver i like, just what you said it`s cool to have to possibility to expand later on.


it sounds like your already working with arduino. I`m still a newby with the arduino but got the most things i want running. lcd, temp&humidity, sd logging, rtc, gsm, it`s just that pwm makes my head hurt i was trying to pwm a pc fan, the specs tell me that i needed 24khz but couldn't find a way to get the arduino produce 24khz its now on 31khz and that works fine for this fan. So i`m not so sure how to pwm-control the driver correctly. Any place you can point me to?

if i can figure the pwm part out, than i definitely take this tour!

greetings!

Click to expand...

a good place to start would be post #71 on page 4 of this thread: https://www.rollitup.org/t/meanwell-led-drivers-3-in-1-dimming-function.838760/page-4

for an entire grow room controller adapted from a fish tank controller there is Meepduino 2.0
http://www.nano-reef.com/topic/324859-meepduino-20-released/

and this is worth reading: http://coralux.net/?page_id=45

http://forum.arduino.cc/index.php?topic=155985.0