Quote Originally Posted by DreadedHermie
Cause I cooked them, too. Both of 'em. :sadcrying

They were working fine, although they wern't too close electrically.
Blue#1: 15.2V gave 1.5A, 14.7V gave 1.2A
Blue #2: 15.6v gave 1.5A, 15.1V gave 1.2A

A .48 ohm resistor in series with Blue #1 would have balanced the two emitters in parallel at 15.1 V.

I ran them singly, and together, and let 'em burn in for awhile. Here's where I must have made a mistake, but then I'm still not sure how these CC / CV supplies are "bending" the "law." It seemed like the pair should be able to handle 3A between them. 14.8V gave 2.2A when I dialed it in. I played around near those parametersfor awhile, disconnected them (spike there somehow?) and when I tried to reignite them, they too had one "corner" out.
So the blues are history, too. :i feel stupid:

Not really sure why I've had such a destructive night. I've still got 3 working reds, but now I don't want to hook them up as a group without some advice. Should 3 of them be able to take 3.6A at 10.8V, or will this PS somehow feed 3.6A to each of them?
If they draw 1.2A at 10.8V within .1 V. each, then 3 in parallel should divide the 3.6 A. draw almost equally.
I'm wondering if you are getting zapped by static electricity.
These pups will not tolerated much reverse bias. and should be treated like cmos when handled.
That means no shoes and/or a wrist strap.
Never did ask where you are from.
Most of the mainland is cold and low humidity in February.
Perfect conditions for zapping LEDs.
Weezard Reviewed by Weezard on . Calling out to Weezard for LED advice My friend, I've read your stuff here and at Steve F.'s site. I want to build a dedicated flowering lamp using Ledengin 15 watters. (4 reds, 1 blue, and possibly 1 warm white; LM 317's so I can tweak the ratios.) Essentially, a copy of your 4+1 cake pan lamp but built on a 4 x 18" finned heatsink so I can see what's going on under it.) If I were to post my picks for power supply, resistor ratings / values, etc., would you critique and perhaps offer some guidance? I have already purchased Rating: 5