DIY LEDs - The write-up
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HeneryH
Henery Hawk
No, but I should. that would be pretty easy to do and be a great test case.
Yes, it sure is. My original goal was to pretty it up and use the heatsink itself as the primary visual for a hanging fixture. It got a little uglier than I'd hoped. I will still tinker with options for prettying it up. I didn't think $215 shipped was a bad price for it.
chathaway417
New member
Thanks, I'm not sure where my math was off, I thought it was pretty close, but obviously missed something somewhere!
Ebay is where I found the PSP-600-27, also where I found the PSP-500-24 for $40 more (but is still $50 less than a new PSP-600-24). Here is a link to datasheets for both:
http://wattsupply.com/s.nl/sc.30/category.2256/.f
Would the PSP-500-24 work for 96 LED's running at 700mA on two of the 8 driver CAT4101 boards?
What about running 3 boards with 120 LED's? Would the PSP-600-27 or the PSP-500-24 work in that situation?
Thanks!
Please forgive my ignorance but I really want to try LEDs. My question is that when I look at retro fit kits from rapidled I see that for 48 LEDs I need four drivers. I believe I need around 150 LEDs for my 180 so that means I would need 12 drivers. I don't have nearly that many plugs available. I'm assuming there is a better way to do this. Not to mention how do I dim all those drivers at one time? Can someone please point me in the right direction? Thanks. If I need to start reading this thread from the very beginning I can do that, but if there is someting a little more condensed out there that would be great. Thanks.
chathaway417
New member
You are in basically the same situation I was in (120 LED's for a 125g), check out the DIY driver thread
http://www.reefcentral.com/forums/showthread.php?t=1759758
I am using the 8 driver boards, you can run 8 strings of 6 LED's for 48 per board, so you could use 3 or maybe 4 boards, power supply, and controller if wanted.
TheFishMan65
New member
500 watts at 24 volts can supply 20 amps. Going wiht 80% sadtey means 16 amps. So 16 string at 1 amp or almost 24 at .7 amps. 16 * 6 is your 96 or 144 at .7.
kcress
New member
Hi chathaway417. (Got your pm)
That "500" is more than enough. Nice supply too.
As Fish sez you must limit the voltage being controlled thru your chosen controller to below 25V. So a 24V supply makes way more sense. Use the 500-24.
If we assume your average Vf is going to be 3.4V (Gs are 3.3V and Es are 3.5V) and you want 700mA, the total load you need to supply is about:
3.4V x 0.7A x 120LEDs = 285W
You don't typically want to exceed the supply's rating by more than about 80% of its maximum or cooling and lifetime become issues.
285/500 ~ 57% It's actually a little bit of overkill but I'd use it. A three hundred watt supply would probably provide a little more system efficiency but without the supply's curves to look at I can only speculate that you're giving up some eff. Use it.
chathaway417
New member
Thanks FishMan and kcress, just made an offer on that PSP-500-24 power supply and got it for $75, now I have the bulk of my materials for my build on hand or ordered, so on to figuring out which controller to use and hopefully will start my build thread next week sometime. Thanks for all your help! :bounce3:
S2minute
New member
Virtual LED Prog...
Virtual LED Prog...
Just an idea...maybe already thought of but....what if there was a Virtual LED Prog that had ALL the current standard tank designs plus a way for custom designs to be pluged in. Then for the demensions of that tank, the ability to enter all the data for your light system, drivers, led types, lens size ect,(and all the parameters of those devices). Then have it give you a virtual video of what that tank would look like exactly with the paramaters you want and what you want it to do? Not only that but it can be used for ANY lighting scheme,(MH,VHO,T5,LED,PC), you want for your tank, and even do comparisons? Or maybe i`m just ...ummm in the dark here and a prog already exists for this?
Virtual LED Prog...
Just an idea...maybe already thought of but....what if there was a Virtual LED Prog that had ALL the current standard tank designs plus a way for custom designs to be pluged in. Then for the demensions of that tank, the ability to enter all the data for your light system, drivers, led types, lens size ect,(and all the parameters of those devices). Then have it give you a virtual video of what that tank would look like exactly with the paramaters you want and what you want it to do? Not only that but it can be used for ANY lighting scheme,(MH,VHO,T5,LED,PC), you want for your tank, and even do comparisons? Or maybe i`m just ...ummm in the dark here and a prog already exists for this?
S2minute
New member
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Oh you do, do you? Well, i surely would if i was a programmer. However, there`s nothing like a positive attitude right
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Oh you do, do you? Well, i surely would if i was a programmer. However, there`s nothing like a positive attitude right
.Found one, thanks.
Will just come and check with you guys if it will work with the driver I want to use
and applying power to everything.
Do I need a seperate PSU for my pwm and driver or could I make them work of 1?
Just asume it is the CAT driver.
S2minute
New member
Led
Led
Dave that looks awesome, can`t wait to see the progress. I just bought the soldering station and Multi-meter lol. HSs are next!
Led
Here's a small update.
300 LED build. HLG meanwell's.
-Dave
Dave that looks awesome, can`t wait to see the progress. I just bought the soldering station and Multi-meter lol. HSs are next!
hello people, i'm dimitri and i write you from italy, i would really apreciate if you can help me chose right for my next led build, i was planning to do it with the 3w powerleds, but i also saw online we can find 10w powerleds with the same characteristics of the 3w, so i guess they would fit a reef needs. what i don't know is how many leds do i need for my 72inch x 28 x 28 ? can you help me with this? i mainly want to grow lps with some sps. thank you in advance!
der_wille_zur_macht
Team RC
dr.v, the only way for us to provide good answers to your questions are if you can point us to the specific LEDs you are interested in using. 90% of builds discussed here are using Cree XP-G, XR-E, or XP-E, so our answers are usually based on those LEDs - but if you're interested in some other (10 watt) LED, you need to let us know the specifics of those LEDs so we have a basis for our answers.
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