Pi for dimming Cree star LEDs: Check my build list? Also questions.

[Mekong]

I want to build a DIY LED lamp for a high tech planted aquarium, and have it PWM controlled for dimming with the Pi. Eventually I want to control as much as I can with the Pi on the tank, but starting with the light.

I am copying the LED setup that the AI Prime uses: Prime Freshwater » AquaIllumination® but upgrading to cree G3 instead of G2. Is there any reason I should stick with G2, I see the G2 are "up to" 1.5amp and the G3 are "up to" 2 amp.

For drivers, do I have the right ones selected? 1.5 and 1 amp high voltage.

How big of a power supply will I need?

Build list: https://i.imgur.com/WYEH6fI.png

I also want to put a temperature sensor on the heatsink to turn on/off and speed up a fan on the heat sink. I read something about a SCW driver to control this, can anyone give me some info on how that works?

 

[Mekong]

 

[oreo57]

24v 60W or better,, switching power supply...

 

[Mekong]

How many amps to drive the G3, E2, and E with?

 

[mcgyvr]

How many amps to drive the G3, E2, and E with?

Thats really up to you and how well you can heatsink them..

You can drive the G3's at 2A max (1500mA LDDs would be fine).
The E2/E are 1A max so 1000mA LDDs or 750mA would be fine..

 

[Mekong]

Thats really up to you and how well you can heatsink them..

You can drive the G3's at 2A max (1500mA LDDs would be fine).
The E2/E are 1A max so 1000mA LDDs or 750mA would be fine..

Thanks, how do I know what amperage to drive them with, from your comment I am guessing %75 of max? I am planning on the Makers heatsink, they claim "100-120W of cooling per foot".

Also more of a FW question, but should I consider adding a cyan and/or a hyper violet in addition to the RGB LEDs I have? I have been looking at the spectrum for chlorophyll and it looks like a wide blue spectrum and wondering if they would help expand on that, or just be useless. Again, not a reef, FW planted.

 

[oreo57]

Do you have a twin?
http://www.plantedtank.net/forums/2...-leds-check-my-build-list-also-questions.html

Not to discourage you here but there is more targeted info there...

 

[Mekong]

You got me! Yeah, I used to frequent this site a bunch when I was reef keeping. I found reef central people seem to know what they are talking about on a much higher level than other sites. I asked on various planted communities and got a less of response and guidance than I was hoping for, many questions were unanswered. I hope that my chances of coming across someone here who has built a DIY light would be greater here.

So spectrum aside, the technical aspects of building a light are not that really different.

 

[oreo57]

Problem is most will ignore fw...