Calling out to Weezard for LED advice

[Crunchypants]

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 the Mastech 3010 you've talked about.

Hoping you'll see this,
Crunchypants

Crunchypants Reviewed by Crunchypants on 02-11-2009. 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

[khyberkitsune]

Looking great! So glad you bought pre-mounted LEDs because let me tell you IR or oven reflow soldering is a PAIN.

[mx4intx]

Thanks Weeze. You are awesome. You too Khyber.

Advice: Read a lot, learn to solder, plan, do.

I have some Jack Herer clones ready to go. They get da purp treatment starting today. I will have more pics later once everything is set up.

And thanks to DH for starting this thread and everyone who contributed.

[Weezard]

The screamin' bright, J-light?
Outta sight!
May your gals grow fat
an' your buds be tight.

Thanks for the photo's.
Any advice for the next DIY guy?

Aloha nui techie.

Weeze

[mx4intx]

the j-light 115, heh, no plans to commercialize, its a joke

10" high with the shroud (one power supply is the rail mount kind and sticks way up)

8.5" wide from the front and 6" deep

2" of shroud hang below the LEDs

Attachment 273239

[mx4intx]

Well the new LEDs arrived today. Building resumes tomorrow.

[mx4intx]

Well no microscope so I cant tell. It looks like a single emitter to me. The 10w ledengin LEDs look like they have 4 diff dies. The 5w look like one die.

edit to add: Three hours sleep last night combined with just getting back from babysitting means I probably wont work on the light today. Dont want to screw something up due to being tired.

[khyberkitsune]

You'll need a microscope to get a good look inside to tell if it's multi-chip or single-chip.

Have a pic of a 1w Nichia 460nm emitter, multi-chip, and an Osram 660nm single-chip emitter. Note the bonding wires inside of each die area and where they connect. Some single-die emitters use multiple bonding wires for better electrical saturation of the diode, but it should be fairly easy to tell if it's single or multi.

[mx4intx]

Are these true single-chip or multi-chip packages?

Pretty sure they are single chip. Multichip doesnt start until 10w with ledengin I think. Only ever see two wires going into the die also.

[mx4intx]

Wife came home with 18oz cups for tomatoes and peppers so the JH's got up-cupped. The other cups were 9oz.

Peace