LED and other Lighting
DIY LED panel not working properly, need advice. in the
Indoor Growing forums; I finally got my PCB and 3w leds for it, soldered them on, connected the driver, plugged it in and ...
DIY LED panel not working properly, need advice.
I finally got my PCB and 3w leds for it, soldered them on, connected the driver, plugged it in and not much happened. They barely lit up. I checked the voltage from the driver to the board and every thing was fine. I also noticed that when i touched the edge of the pcb they light up a slight bit more but still no where near what it is suppose to be. Does anyone have any ideas.
Just curious, but how many LEDs, and why a PCB instead of mounting them to a heat sink?
Im running 24 x 3w leds. I went for a pcb because it is neater and im not using a heat sink, im just going to mount a 120mm pc fan to the back of it.
Originally Posted by brotherjericho
Maybe someone else can chime in, I'm still a noob to LED, but that many 3w LEDs on a pcb sounds like a recipe for thermal disaster.
Do you have a multimeter?
Sounds to me like the thermal slug might not be isolated or sometihng like that. If you have a multimeter (which you should as they cost pennies and are hella useful) you can do some diagnostics.
Originally Posted by kinddiesel
I run 24x 1W led pcbs bare with 120mm fan only, 24x 3w may be too hot as brotherjericho mentioned. That said, it wouldn't be what is causing you the problem at hand. What are the specs on the driver? did you test the LEDs individually with some AA batteries?
Originally Posted by caretak3r
No i havent tested the leds yet, ill give that a go. As for the heat issues, i already have a 50w ufo (25x3w) and that only runs a tiny 80mm fan and its not even warm to the touch. Im hoping to run a similar setup to that but if i find it is running too hot i can get a heatsink like on the astir grow lights. I bought the same pcb from Merry so i definately think its either my bad soldering or maybe a couple of dodgy chinese leds. I got my leds for about $3 for 10 so you can only imagine how good they are. I re-ordered another pcb from Merry and decided to get her to supply and solder the leds on for me so hopefully no more problems but it would be nice to know what i have done so i can learn for next time.
The specs of the driver are output voltage is 50-100v, 630mA current
Last edited by jimjim2609; 07-03-2013 at 03:47 PM.
The 'Snot brother' is onto it....i had troubles without a multimeter to isolate the problem......
There is alwayz the 'Franjan'...get a foil pie plate (not sure what they are called) mount the PCB on that, with the fan on the back....it also doubles as a reflector...
So I take it from this info that you need a minimum of 50V forward. Do you have that?
Originally Posted by jimjim2609