User Tag List

Informational! Informational!:  0
Likes Likes:  0
Page 4 of 18 FirstFirst 1234567814 ... LastLast
Results 25 to 32 of 141

Thread: White LED experiment

  1. #25

    Join Date
    May 2010
    Location
    NY
    Posts
    14
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Well, I had an older one of these laying around from a PC:

    http://www.zalman.com/ENG/product/Pr...ad.asp?idx=356

    Like I said...overkill. The heatsink is barely warm to the touch, even with my LM317 epoxied to it.

    I get all my parts from either www.mouser.com or www.digikey.com. You can get an LM317 and the appropriate resistor(s) for less than $2 not including shipping. Led driver ICs like the CAT4101 are available for a few bucks a piece too.

    Let me know how the passive cooling works for you, I plan on converting to something with a lower dB rating eventually.

  2. #26
    Av8tor1's Avatar
    Join Date
    Jan 2007
    Posts
    4,811
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    well that definitely has the wow factor
    very cool.... can you post pics of your set up

  3. #27
    mobile's Avatar
    Join Date
    Nov 2007
    Location
    Aberdeenshire, Scotland
    Posts
    1,070
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    My first LED growlight used an LM317 as the current regulator. It was a 3 x 1W LED setup. I remember calculating the wattage dropped across the LM317 (Vin - Vout x If) and the number was quite low but I was amazed on how hot the regulator got. Initially I only had it on a small heatsink but had to re-design the lamp housing so that I could fit a larger one and a small fan!

  4. #28
    Av8tor1's Avatar
    Join Date
    Jan 2007
    Posts
    4,811
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    I gave the 317 serious consideration, but the buckpack came from the same source as the tristar so little to no extra shipping... plus its adjustable (at least the model i selected), 95% efficient and pretty much just "plug and play"

    If I had ordered anything from a different source... after the additional shipping I would have been closer to the same price, so In my specific case it just made sense.

    And no additional heatsink required.

    But there are a lot of ways to skin a cat

    ---------- Post added at 11:38 AM ---------- Previous post was at 11:36 AM ----------

    Did you two do any experimentation with aux optics?

  5. #29
    mobile's Avatar
    Join Date
    Nov 2007
    Location
    Aberdeenshire, Scotland
    Posts
    1,070
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Av8tor1 View Post

    Did you two do any experimentation with aux optics?
    I've only made a couple of LED growlights. To be honest I haven't been too impressed with the results so far so have left it to others, like you, to exeriment with the newer stuff. My growlights were 1W red and blue Luxeon stars, so I used wide angle optics to combine the colours as close to the source as possible so that I didn't have to increase the distance between plant and light.

  6. #30

    Join Date
    May 2010
    Location
    NY
    Posts
    14
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'm not using any optics because the widest angle ones I could find for my leds were around 20 degrees. My lights are about 1' above the plants, so for the time being I'm using polished aluminum flashing to redirect the 120 degree emittance down to around 45.

    You guys might be interested in taking a peek at the led discussions going on in the reef aquarium community.

    http://www.reefcentral.com/forums/forumdisplay.php?f=3

    Leds have recently become the best option for corals, and there's a wealth of discussion on DIY led fixtures.

  7. #31
    Av8tor1's Avatar
    Join Date
    Jan 2007
    Posts
    4,811
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    very cool.... thanks,

    another good resource: http://www.candlepowerforums.com/vb/index.php

  8. #32
    Av8tor1's Avatar
    Join Date
    Jan 2007
    Posts
    4,811
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Zero View Post
    Av8tor1,
    What plant are you going to experiment on?
    The luxeon LED's are REALLY bright.
    OMG these things are bright.... I was playing around with mine for the firs time today. I was trying not to look at it too much and thought I was doing a decent job. That is until I turned it off, then I saw freaking spots everywhere LMAO.... better now but my oh my LOL

    mental note, be much more careful sheesh....

    trust me when I say respect these babies

Page 4 of 18 FirstFirst 1234567814 ... LastLast

Similar Threads

  1. White Brugmansia - White Angel Trumpet dustin $2
    By kamiljablo in forum 2009 NASC Benefit Auction
    Replies: 7
    Last Post: 06-06-2009, 11:11 AM
  2. VFT Experiment
    By b.t. in forum Venus Flytrap (Dionaea ) Care Information & Tips
    Replies: 24
    Last Post: 10-25-2007, 06:51 AM
  3. experiment...
    By CP_dude in forum General Discussions
    Replies: 12
    Last Post: 07-07-2007, 02:38 PM
  4. New Experiment
    By jimscott in forum General Discussions
    Replies: 6
    Last Post: 05-05-2006, 06:38 PM
  5. Just an experiment
    By Mondo in forum Venus Flytrap (Dionaea ) Care Information & Tips
    Replies: 1
    Last Post: 03-06-2002, 09:46 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •