I wired my Cree LEDs positive neg throughout, and connected the positive to the red wire on my Meanwell and ran a brown extension cord to the brown and blue wire on the ac side of the meanwell. I turned the plastic knob all the ways counterclockwise and plugged in. I am getting no light. I don't have a multimeter at this point, but shouldn't I get some light? I am using the red and white 20 gauge wire from Home Depot. What's strange is that after I unplugged, after about 3 seconds all the lights flashed. Any thoughts?
Can't get LEDs to light up
- Thread starter Sloanhaus
- Start date
Jerzey
New member
rapid diy wiring info
http://www.vinnymarini.com/pictures/rapid_docs/Using Your Dimmable Driver.pdf
http://www.vinnymarini.com/pictures/rapid_docs/Using Your Dimmable Driver.pdf
I have read this and done all the steps, except the multimeter. I have 15 blue LEDs hooked up and I have tried 3 different ELN-60-48Ds. I should be seeing something. All LEDs
I tested all 15 LEDs at the solder point and they all lit up.
I tested each one and they all lit up.
mcgyvr
New member
you need to have the dimming signal or they might not light up..
or you have a short.. testing each individually is not a suitable "short checking" method.
use a multimeter on continuity mode from each soldered pad to the heatsink
and whats the forward voltage of each LED?
try removing 1 led from the series string and see if that works.
or you have a short.. testing each individually is not a suitable "short checking" method.
use a multimeter on continuity mode from each soldered pad to the heatsink
and whats the forward voltage of each LED?
try removing 1 led from the series string and see if that works.
Rapid LED said you don't have to have a dimming signal.
I glued them down.
I will get a multimeter today. Thanks.
fishpureluck
Member
Take a piece of wire and jump across the LEDS one by one, you may have a dead one. The LED may have failed open, so shorting across the failed LED should make the others light up. Just touch the wire to the + and -. One at a time.
SGT_York
New member
Did you retest the led's after soldering? solder connecting a lead to the heatsink may have shorted them out, retest with a battery, each one individually. If they work then you know you have a connection problem somewhere, a multimeter will help show you where.
(beware running a full driver through a few LED's will fry them)
(beware running a full driver through a few LED's will fry them)
fishpureluck
Member
(beware running a full driver through a few LED's will fry them)[/QUOTE]
That's why you do one at a time, short one, no light, pull shorting wire and move to the next.
That's why you do one at a time, short one, no light, pull shorting wire and move to the next.
Could be the LEDs are not getting enough voltage. You have 15 LEDs on a 48V supply. If they require over 3.2V each (which is quite possible depending on drive current and LED chip) then you are not giving them enough voltage to light them. Drop the current down (SVR2 internal screw potentiometer in the ELN) and see if they light then.
Tim
Tim
letoan
New member
As far as I know, if no voltage go to the dim wire on the driver = no light.
If dimmable drivers are being used, this is correct. Take a 9v battery to the white/blue dimming wires so it actually outputs some power to the LEDs. Assuming this is using the 1-10v dimming.
I've done everything, and no lights. I made a video of the setup, this is my last effort.
http://youtu.be/bGBoBzOnD1Y
http://youtu.be/bGBoBzOnD1Y
Aqualund
New member
first off as a previous poster said, 15 leds is too much on your 48vdc psu. I would drop to 14 and try that.
If it still doesnt work, I would switch to the "ohm" symbol on your multimeter and t4est every solder point you made to ground and see if you get anything else beside "OL," if you do, then you have a short somewhere...meaning one of the wires somewhere is either touching the aluminum on the starboards or the heatsink itself or even screws if you have any.
also just double check that your + and -'s are right. Ive made that mistake many times.
If it still doesnt work, I would switch to the "ohm" symbol on your multimeter and t4est every solder point you made to ground and see if you get anything else beside "OL," if you do, then you have a short somewhere...meaning one of the wires somewhere is either touching the aluminum on the starboards or the heatsink itself or even screws if you have any.
also just double check that your + and -'s are right. Ive made that mistake many times.
Rapid led told me I could do 15, that's why I did it. I will try what you recommended. Thanks for the reply.
letoan
New member
Like others said:
Start with checking for short and all the solder points.
Make sure you set the output current on the driver correctly.
Whatever power source you use as a dimming signal, make sure they works. I would bypass the pots and connect it straight to the driver until thing sorted out.
Reduce the total of LED (usually if you have 1 extra the string would still lit, just very very dim, remove 1 or 2 just in case).
BTW, do you have another driver?
Start with checking for short and all the solder points.
Make sure you set the output current on the driver correctly.
Whatever power source you use as a dimming signal, make sure they works. I would bypass the pots and connect it straight to the driver until thing sorted out.
Reduce the total of LED (usually if you have 1 extra the string would still lit, just very very dim, remove 1 or 2 just in case).
BTW, do you have another driver?
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