LED Drivers question

[danielsn]

I have the PWM version of RA, is there any way to control a 0-10 V ANALOG driver? Just to be sure before buying a DIY kit.

Thanks !!

[rimai]

Although is does work, you will have non-linear dimming

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[danielsn]

Hi Roberto the driver is a 700mA Hyperon from ReefLEDLights, is there a way to have a linear response with these?

Thanks!

[rimai]

If the driver is analog type, the only way to get a linear response is the analog version of relay box.


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[danielsn]

Roberto, is there any info (curves perhaps) of how much non-linearity one could expect using a 0-10 analog with the PWM output? I asume that 100% input on the driver vía de PWM signal gives 100% output for the leds (is that right?), what about 50% or 15%?
The reason for all this is because the seller dont have the PWM option in his store, and I really dont want to buy LEDS and drivers to differents sellers

Thanks!

[rimai]

I don't have it, but I would think it would look like a logarithm
http://en.m.wikipedia.org/wiki/Logarithm#_

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[Sebyte]

Hi Danielsn

If you have not yet bought your kit, I would recommend MeanWell drivers.

Also if you have not read this post http://forum.reefangel.com/viewtopic.php?f=2&t=788 have a read.

I have no connection with the company mentioned only bought componants from them when designing my own DIY LED system.

[danielsn]

Hi Steve, thank you for your help on this ..

I´m planning to have 2 units with a total of 96 LEDs as follows (in 2 heat sinks about 18" each):

30 XP-G cool white
48 XT-E Royal blue
16 XP-E Blue
2 Violet UV


I was thinking using Meanwell ELN 60-48P, which can have between 8 and 12 leds per driver, so I will need 8 drivers (4 in channle white and 4 in channel actinic)

-----------------Channel
-----------------W---W---W---W----Ac----Ac----Ac----Ac
-----------------Dv1-Dv2-Dv3--Dv4--Dv5---Dv6--Dv7--Dv8
Cool White-----12---12---3----3----0-----0-----0-----0
Royal Blue-------0-----0---1----1---11---11----12---12
Blue--------------0-----0---8----8----0-----0-----0-----0
Violet UV---------0-----0---0----0----1-----1-----0-----0


I know from your post that you are using the LPF 90D-48 with led in parrallel strings and is working Ok, any opinion is apreciated

Thanks!

Daniel

[Sebyte]

Big setup!

Good choice if you can afford that many drivers, my approach is more economic thats all

There are many roads to Rome, the straightest gets you there the quickest (quote from some long dead traveler )

[danielsn]

You are absolultelly right, thanks Steve!