pastelball
New member
can you use a 12v power supply to power leds? I have one from I think its a lap top one it is putting out 12V. I want to wre up some leds for a 4gallon I am building.
led power
- Thread starter pastelball
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pastelball
New member
ok, thanks. Don't have a driver will order this.Mean Well LDD-1000HW dimmable driver. This should do the trick.
With a 12V supply, that will only run a 9V string of LEDs. Depending on what LEDs they are, at 1000mA that may be just 2 LEDs in a string!
Tim
pastelball
New member
Well that sucks. looks like I might more oney wrapped up in this than want to. Might as wel buy a light.
You may be able to only run 2 or 3 in a strong, depending on what they are, but you can run multiple strings from the one PSU with multiple drivers or even (not ideal, but technically possible) run multiple strings in paralell from one driver.
Tim
oreo57
Well-known member
You can run a ton if you go "driverless" and use current limiting resistors after each 3 in series..
Up to the power supply amps/ind amps x # of 3 diode strings in series..
CAUTION:
Besides the heat and asst. other things it is fairly inefficient..Well that is part of the heat thing
http://led.linear1.org/led.wiz
you forgot to mention the current decrease..
Say they get a 1500mA LDD and put 3 in series/3 parallel groups.
Each group will run at 500mA approx
Due to th V(f) decrease at 500mA 3 is "possible" in series, or 6 parallel groups at 250ma
Each should be fused as to prevent a "cascade failure" if one or more strings fails open
pastelball
New member
Would I be ok to go with thishttp://www.rapidled.com/0-10v-dimmable-nano-driver-with-potentiometer/
I have 2 cool white leds and 4 royal blue
I have 2 cool white leds and 4 royal blue
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oreo57
Well-known member
pastelball
New member
I will go with that then. Started looking at the mr 60 led light on ebay. Looks good just color doesn't seem to be to good.
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