DIY Modular LED-Light

guod

guod

Well-Known Member
hey,

here is a short brief of my Projekt

First: Layout; Spectrum
Modul-Spec..jpg
24W for the LEDs, 1W for the Fan

a Look at the Prototyp
front.jpgBack.jpglight.jpg
it woks but soldering looks bad

Second: Case & Cooling
Parts - Air-Flow.jpgModul-Case.jpgModul-Fan.jpg

Prototype size with 37.0 x 10.5 x 7.0 cm
Heatsink Temp. stays below 5K over Ambient-Temp. /pretty coool
The Fan also work very silent.

some Ideas to Drive two Moduls
Power.jpg

nice Weekend to all
 
Rasser

Rasser

Active Member
guod said:
hey,

here is a short brief of my Projekt
First: Layout; Spectrum
24W for the LEDs, 1W for the Fan
a Look at the Prototyp
it woks but soldering looks bad
Second: Case & Cooling
Prototype size with 37.0 x 10.5 x 7.0 cm
Heatsink Temp. stays below 5K over Ambient-Temp. /pretty coool
The Fan also work very silent.
some Ideas to Drive two Moduls
nice Weekend to all
Click to expand...
Hi it looks great !
I especially like the quality of the drawings, and what is this spectrograph images you got embedded in the drawing , very interesting :-)
I got these 4 questions when looking at you post.

1. How many mA are used to run the fan?
2. What's the function of BD438 and the diodes when using a CCdriver ?
3. What's the function of the 4 effect resistors in the button and the transistor ?
4. where did you buy the LEDs ?

Edit: no.2 Cut the power if one module blows off, it could look like.
 
P

patrikantonius

Active Member
Excellent project guod!! Golden dragons, excellent thermal design, modular... I think we've got ourselves a winner!!
Some things don't really seem necessary as Rasser mentioned but maybe you can explain, other than that I am thrilled!
Keep us updated :)

bonus: see what wonders the GD+ can do here http://bit.ly/MNaM3R
 
guod

guod

Well-Known Member
I especially like the quality of the drawings, and what is this spectrograph images you got embedded in the drawing , very interesting


Thanks Rasser
for the spectrograph images google after "LedEngin Proposal and Tools" and Download the Excel-sheet.
table cw5500 cell D102 is linked to table All_spectra_101212 cell O11 thats wrong change this to cell O13. same for table ww2900: D102 O13 > O11


1. How many mA are used to run the fan?
roundabout 70 mA,

2. What's the function of BD438 and the diodes when using a CCdriver ?
Edit: no.2 Cut the power if one module blows off, it could look like.
your answer is correct.

3. What's the function of the 4 effect resistors in the button and the transistor ?
"current-mirror"

4. where did you buy the LEDs ?
reichelt.de # they have only the Emitters
leds.de # StarMCPCB & premounted Leds
some specials
http://www.conrad.de/ce/de/product/180825/DOPPELKLEBEPAD-F-HEXAGON-LEDS-28ER-SET/0205065&ref=list
http://de.rs-online.com/web/p/led-zubehoer/7208933/

and some pics from my other light
http://s1073.photobucket.com/albums/w399/guvoo/
 
S

staf82

Member
Looking forward to seeing this up and running, i was thinking of making a modulad diy led light so im glad i get to see other peoples attempts first, by the way it looks GREAT!
 
guod

guod

Well-Known Member
the Moduls are now in a state that i can go for some tests.
m50front.jpgm50back.jpg

running at 200 mA to get this Pic.
m50lighttest.jpg
full load is no problem as long as you wear sunglasses.

the color of light ´for growers
lightcolor.jpg
25cm from the wall
 
FranJan

FranJan

Well-Known Member
Lookin good Guod! Is it time to put a plant under it yet :weed:?

I think what's great about little panels like this is they don't cost a fortune and have a simple design that's easy to make. Start by making one and then just keep adding them until you have enough to cover your full grow. No need to lay out any big bucks to get started, which is a big plus since cost seems to be one of the main reasons many people don't get into LED growing right now. Any chance these panels can be designed to be daisy-chained Guod? Or does that introduce a load of design issues?
 
guod

guod

Well-Known Member
Lookin good Guod! Is it time to put a plant under it yet
?
Click to expand...
Yes,and as fast as possible, believe me!!!

in the meantime some pics from a plant that lives under the other Lamp.

30W Led-Power; 37W from the Powerline
6. Week; 16/8; only water, soil and Light

plant -height: 30cm, -diameter: 50cm max; 45cm min.
m33plantv.jpgm33plant.jpg

I think what's great about little panels like this is they don't cost a fortune and have a simple design that's easy to make. Start by making one and then just keep adding them until you have enough to cover your full grow. No need to lay out any big bucks to get started, which is a big plus since cost seems to be one of the main reasons many people don't get into LED growing right now.
Click to expand...
kudos, the right words of some of the ideas behind my projekts. :clap:


Any chance these panels can be designed to be daisy-chained Guod? Or does that introduce a load of design issues?
Click to expand...
I have concept in my sketchbook for 4 daisy-chained dimmable moduls.(200W max.)
Beyond 6 we run into trouble with the input current for all moduls. you have to deal with AWG 10 or better Wire.

more off them in some of my next posts.

stay tuned,
 
IlovePlants

IlovePlants

Well-Known Member
I'm not sure if anyone else made a point of downloading that ledengin spectrum tool, but it is very fun to mess with and easy to develop great ideas.
+Rep to guod for introducing me to this little treat.
Sincerely,
Iloveplants
 
guod

guod

Well-Known Member
So, I´m back from my secret lab with good news.
let me start with the cooling-test

general settings for all 3 tests:
current: 700 mA
voltage: 35 - 36 V
room-temp.: 23°C (73°F)
the second Modul in the prototyp works at 75% fanpower (for a little bit more drama)

1. 100% fan-power (0.9 W)
Temperature for all Leds are below 40°C this means also that the light-Output is > 90%
at higher room-temperature up to 30°C only the red leds(630 nm) goes down to 85 - 80%

2. 75% fan-power (see it as an old dusty fan)
no dramatical change here, plus 2-3°K for the leds.
for this test i change the 27 Ohm to 56 Ohm.

3. defect fan (worst case)
heatsink goes up to 50°C
the temp. of the leds is near 70°C (up to 85°C will be no problem for Leds)
the output for the 630 nm leds is now at 65%. all other leds are over 85% (little shift in the spectrum)
as you see the modul works w/o a fan and we get enough time to fix the fan.


patrikantonius
Golden dragons, excellent thermal design, modular... I think we've got ourselves a winner!!
Click to expand...
 
PetFlora

PetFlora

Well-Known Member
Have you thought about rotating one 180 degrees so that the red line of leds is on opposite sides?
 
guod

guod

Well-Known Member
PetFlora said:
Have you thought about rotating one 180 degrees so that the red line of leds is on opposite sides?
Click to expand...
you,ve got me,
missed that point in the prototype and don´t see it for 2 weeks.

here are some of my findings about light blending for this modul

the light mix; minimal aeras with only one color
M25-mix0.jpg

minimal distance and spread

M25-mix1.jpg M25-mix3.jpg

layout for 2 and more moduls

M25-mix2.jpg
 
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