Driving LEDs with PWM driver and power source - The Planted Tank Forum
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post #1 of 2 (permalink) Old 04-15-2020, 01:03 AM Thread Starter
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Driving LEDs with PWM driver and power source

So I have my LED build all set up but I want to add a few more color options

I have 3 CREE XP-E HE Photo Red (660nm) LEDs and 2 CREE XP-E Green 3W LEDs that I want to add on my fixture

I have a MEAN WELL LDD-1000H DIMMABLE DRIVER


and a CORALUX STORM LED CONTROLLER that I want to use to PWM control the lights from sunrise to sunset.

The issue I'm having is that I used to have the MEAN WELL LRS-350-36 power supply but got rid of it now

I only want to run 3 LEDs, 1 red(forward voltage 2.36 at 1000mA), 2 green (forward voltage 3.7 at 1000mA) in series and want to drive them at 1000mA

my question is, I have these brick power supplies from old electronics. Can I just wire these to the LDD dimmable driver and it'll work since it's DC-DC? I'm guessing the 12V 1A will be able to hopefully handle the 3-4 LEDs?




I'm a mechanical engineer so I can get it all together but fail at electrical engineering. any smarter folk can provide some guidance?
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post #2 of 2 (permalink) Old 04-15-2020, 02:20 AM
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Originally Posted by monkeyruler90 View Post
So I have my LED build all set up but I want to add a few more color options

I have 3 CREE XP-E HE Photo Red (660nm) LEDs and 2 CREE XP-E Green 3W LEDs that I want to add on my fixture

I have a MEAN WELL LDD-1000H DIMMABLE DRIVER


and a CORALUX STORM LED CONTROLLER that I want to use to PWM control the lights from sunrise to sunset.

The issue I'm having is that I used to have the MEAN WELL LRS-350-36 power supply but got rid of it now

I only want to run 3 LEDs, 1 red(forward voltage 2.36 at 1000mA), 2 green (forward voltage 3.7 at 1000mA) in series and want to drive them at 1000mA

my question is, I have these brick power supplies from old electronics. Can I just wire these to the LDD dimmable driver and it'll work since it's DC-DC? I'm guessing the 12V 1A will be able to hopefully handle the 3-4 LEDs?




I'm a mechanical engineer so I can get it all together but fail at electrical engineering. any smarter folk can provide some guidance?

"IF" those voltages are correct at 1A..LED voltages change w/ mA's and heating..
9.76V @ 1000mA = 9.76 Watts


Your little converter is capable of 12W though, to be honest, "I'd" prefer more leeway like 1.5- 2A in the ps.. but that's me..
or a 700mA driver


As long as the voltage out is stable (it should be) you should be fine..

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